Acromag BusWorks 900EN Series User manual

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BusWorks® 900EN Series –Modbus TCP/IP
10/100MB Industrial Ethernet I/O Modules
Model 963EN-4012 12 Channel DC Current Input
Model 964EN-4012 12 Channel DC Voltage Input
USER’S MANUAL
ACROMAG INCORPORATED Tel: [phone]
30765 South Wixom Road Fax: [phone]
Wixom, MI 48393-2417 U.S.A.
Copyright 2003-2014, Acromag, Inc., Printed in the USA.
Data and specifications are subject to change without notice. 8500718K

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
__________________________________________________________________
_______________________________________________________________________________________
Acromag, Inc. Tel:[phone] Fax:[phone] Email:[email protected] http://www.acromag.com
2
IMPORTANT SAFETY CONSIDERATIONS
You must consider the possible negative effects of power, wiring,
component, sensor, or software failure in the design of any type of
control or monitoring system. This is very important where property
loss or human life is involved. It is important that you perform
satisfactory overall system design and it is agreed between you and
Acromag, that this is your responsibility.
GETTING STARTED
MOUNTING AND DIMENSIONS………………………
3
CONTROLS & INDICATORS..…………………………
3
ISOLATION BARRIERS..……………………………….
3
CONNECTIONS………………………………………….
4
DIN-Rail Mounting And Removal………………
4
Network……………………………………………..
4
Power………………………………………………..
6
Analog Inputs……………………………………..
6
Earth Ground..………………………………….….
7
WEB BROWSER………………………………………...
7
Home Page…………………………………………
7
Password Configuration Page.………………...
8
Network Configuration Page……………………
9
Test Page…………………………………………..
11
Calibration Page…………………………………..
13
TROUBLESHOOTING…………………………………..
15
Diagnostics Table……………………………..….
15
Trouble Browsing Your Module?.....................
16
Getting Out Of Trouble…………………………..
16
TECHNICAL REFERENCE
KEY FEATURES…………………………………………
17
HOW IT WORKS………….……………………………..
18
ABOUT MODBUS TCP/IP….…………………………..
19
IP Addressing…………..………………………….
19
Dynamic Host Configuration Protocol………..
21
Domain Name System (DNS)……………………
21
MODBUS REGISTERS…………………………………
21
Register Functions……………………………….
21
Register Mirroring……….………………………..
22
Data Types…………………………………………
23
Register Map………………………………………
24
SPECIFICATIONS……………………………………….
32
Model Numbers….………………………………..
32
Analog Inputs..………………....…………………
32
General Specifications…………………………..
33
Enclosure and Physical………………………….
33
Agency Approvals…..…………………………….
34
Environmental……………………………………..
34
Ethernet Interface…………………………………
35
Controls & Indicators…………………………….
36
ACCESSORY CABLES..……………………………….
37
REVISION HISTORY……………………………………
39
TABLE OF
CONTENTS
Symbols on equipment:
Means “Refer to User’s
Manual (this manual) for
additional information”.
The information of this manual
may change without notice.
Acromag makes no warranty
of any kind with regard to this
material, including, but not
limited to, the implied
warranties of merchantability
and fitness for a particular
purpose. Further, Acromag
assumes no responsibility for
any errors that may appear in
this manual and makes no
commitment to update, or
keep current, the information
contained in this manual. No
part of this manual may be
copied or reproduced in any
form without the prior written
consent of Acromag, Inc.
For additional information,
please visit our web site at
www.acromag.com and
download our whitepaper
8500-765, Introduction To
Modbus TCP/IP, or 8500-648,
Introduction to Modbus.
Windows® is a registered
trademark of Microsoft
Corporation.
!

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
___________________________________________________________________
_______________________________________________________________________________________
Acromag, Inc. Tel:[phone] Fax:[phone] Email:[email protected] http://www.acromag.com
3
TB1
11
46
13
44
14
43
16
41
TB4
21 22 24
33
25
32
IN00 RTN
RTN IN10
IN02 RTN
RTN IN08
TB4
IN04 IN05 IN06 GND IN07 DC-
TB3
C
R S TD FT
LIN K
12
45
TB2
15
42
23 26
31
LA C T
ST
3.75 (95.3)
IN01
TB1
IN11
3.90
(99.1)
IN03
TB2
IN09
RTN RTN
P W R
DC+
1.05
(26.7)
4.68 (118.9)
RUN
TB3
2.34 (59.4)
"T"RAILDINMOUNTING
DIN EN 50022, 35mm
E THE R NE T
Acromag
A N A LO G IN P U TS : 4-7
4.35
(110.5)
NOTE:Dimensions AreINCHES (MILLIMETERS).
MODEL 963/964EN ENCLOSURE DIMENSIONS
A N A LO G IN P U TS : 0-3
Model 964EN-4012 Shown
(963EN-4012 Sim ilar )
A NA LOG INP U TS : 8-11
RST
11
46
12
45
14
43
15
42
22 23 25
32
26
31
ACT
ST
IN00 RTN IN01 IN11 IN02 RTN IN03 IN09
TB4
TB2
IN05
RTN
IN07 DC-
RTN DC+
LINK
TB1
13 16
44 41
21 24
33
TB1
RTN RTN
IN10 IN08
TB4
IN04 IN06 GND
PW R
TB3
TB3
ETHERNET
DFT
RUN
TB2
(PLUG-INTYPE)
TERMINALBLOCKS
RJ45ETHERNET
CONNECTOR
ETHERNETACTIVITY
LED(YELLOW)AND
LINK LED (GREEN)
Acromag
RUN/PWRLED(GREEN)
ANA LOG INP UTS: 4-7
REMOVABLE
RESET/DEFADDRESS
TOGGLE SWITCH:
TOGGLE RIGHTTORESET
TOGGLE LEFTTOSET
DEFAULTADDRESS
MODULE STATUS
LED(YELLOW)
ANA LOG INP UTS: 0-3
Model 964EN-4012 Shown
(963EN-4012Similar)
ANALOG INP UTS : 8-11
44 41 33
P W R
NETWORK
13
RTN
16
RTN
21
IN04
24
IN06
TB3
TB1
IN10 IN08
GND
46 4345
RX
42
DC-
DC+
32 31
TB1
11 1412
IN00 IN02 IN01
TB2
2215
TX
IN05 IN03
5V/3V
TB4
TB4
2523 26
IN07
RTN RTN
DC
PWR
RTN RTN IN11
TB2
IN09
ANALOGI/O
A NA LOG IN P UTS : 8-11
ANALOGI/O
A N A LO G IN P U TS : 0-3
ANALOGI/O
A N A LO G IN P U TS : 4-7
TRANSFORMER
TB3
963/964EN
ISOLATION
DIAGRAM
TRANSFORMER
The toggle switch is used to toggle the module into or out of Default Mode
(toggle left), or to reset the module (toggle right). In Default Communication
Mode, the yellow ST LED blinks slowly and the module assumes a fixed
static IP address of “128.1.1.100”, a default subnet mask of “255.255.255.0”,
a default username of “User”, and a default password of “password00”.
MOUNTING AND
DIMENSIONS
Unit mounts to “T” type DIN
rails (35mm, type EN50022).
Units may be mounted side-
by-side on 1-inch centers.
WARNING: IEC Safety
Standards may require that
this device be mounted within
an approved metal enclosure
or sub-system, particularly for
applications with exposure to
voltages greater than or equal
to 75VDC or 50VAC.
CONTROLS &
INDICATORS
Green Run LED is ON if power
is on and will blink in “wink” ID
mode.
Yellow ST LED blinks ON/OFF
if module is in default
communication mode and
stays ON if one or more inputs
are over/under-range.
Green LINK LED ON if auto-
negotiation has successfully
established a connection.
Blinking Yellow ACT LED
signals PHY network Activity
(busy).
ISOLATION BARRIERS
Dashed Lines denote isolation
barriers.
The input circuit, network, and
power circuit are isolated from
each other for safety and noise
immunity.

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
__________________________________________________________________
_______________________________________________________________________________________
Acromag, Inc. Tel:[phone] Fax:[phone] Email:[email protected] http://www.acromag.com
4
45 44 42 41 33
DC+
31
12 13 15 16 21 23 24 26
TB1
GND
46 43
P W R
DC-
32
11 14 22
TB4
25
TB3TB3
PUSH
TB2
"T"TYPE
DIN RAIL
AnySeries9XXEN EthernetModule
PUSH SCREWDRIVER AS SHOWN
TO TILTAND LIFTMODULE OFFRAIL
RemoveTerminal BlocksOnThis
SideToProvideClearance
MODULE REMOVAL
FROM DIN RAIL
PRY WITH SCREWDRIVER
INSERTED IN SLOTHERE
(DO NOTTWISTTO AVOID
DAMAGING PLASTIC TAB)
USE YOUR FINGER TO APPLY
DOWNWARD PRESSURE HERE
AS YOU LIFTAND TILTMODULE
TOREMOVE ITFROMRAIL
8
7
6
4
3
1
1
18
8
5
2
PIN
100M
100M
CLIP
CABLE
10Base-T CAT 5UTP/STP
Not Used
Transmit -
Not Used
Transmit +
Receive+
MDI-XWIRING
RJ-45CONNECTOR
SPEED
Not Used
DISTANCE
Not Used
Receive-
100Base-T CAT 3, CAT 4, orCAT 5 UTP/STP
NoteCrossoverConnections
MINIMUMRECOMMENDEDCABLE
Not Used
Receive-
Not Used
Receive+
Transmit + ETHERNET PORT
MDI WIRING
Not Used
Not Used
Transmit -
RJ45MDI ANDMDI-X CONNECTIONS
When attaching the module to the
T-type DIN rail, angle the top of the
unit towards the rail and locate the
top groove of the adapter over the
upper lip of the rail. Firmly push the
unit towards the rail until it snaps into
place. To remove, first separate the
input terminal block(s) from the
bottom side of the module to create a
clearance to the DIN mounting area.
Next, while holding the module in
place from above, insert a
screwdriver into the lower arm of the
DIN rail connector and use it as a
lever to force the connector down
until the unit disengages from the rail
(do not twist the screwdriver to avoid
damaging plastic).
The Ethernet port of this module is wired MDI and does not include
automatic crossover. The Ethernet port of your PC is also wired MDI and
may not include automatic crossover. As such, you must use a crossover
cable like that shown below when connecting this device directly to a PC.
1
1
3
6
1
6
2
3
1
8
281
8
8
1
PINS: 1TO3
2TO 6
3TO 1
6TO 2
RJ45(ClipSideDown) RJ45(ClipSideDown)
FOR DIRECTPC TO
ETHERNETMODULE
CONNECTIONS
CROSSOVER CABLE
FOR MDI TO MDI
OR MDI-X TO MDI-X CROSSOVER
CONNECTIONS
CONNECTIONS
DIN-Rail
Mounting & Removal
Network
For 100Base-TX systems, use
data grade Unshielded
Twisted-Pair (UTP) wiring that
has a 100Ω characteristic
impedance and meets the
EIA/TIA Category Five wire
specifications.
It is recommended that you
use a crossover CAT-5/5E
cable to connect this device to
your PC.
For 10Base-T systems, you
may use Category 3, Category
4, or Category 5/5E UTP/STP
cable.
In either case, you are limited
to 100 meters between any
two devices.
A crossover cable simply
connects the differential
transmit pair on each end, to
the receive pair on the
opposite end.
Use a standard (direct) cable
when connecting to a hub or
switch port, which are
generally wired MDI-X.

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
___________________________________________________________________
_______________________________________________________________________________________
Acromag, Inc. Tel:[phone] Fax:[phone] Email:[email protected] http://www.acromag.com
5
910
5 6
1 2
CH. I/O STATUS
ACT
8
4
0
RUN
DA
11
7
3
ST
ETHERNET
Acromag
RS
LINK
HOST PC
(Use Crossover Cable)
CAT-5 UTP CABLE
UP TO 100 METERS
Order Acromag Cable Model 5035-360
Note: This MDI-to-MDI connection requires the use of a crossover cable.
HOST PC CONNECTED DIRECTLY TO A MODULE Acromag 983EN-4012
Ethernet Module.
The ethernet port of this
module is not automatic
MDI/MDI-X crossover
and is wired MDI.
S1 S2
DC-
33
DC+
32
RS
109
65
21 3
98
54
10
DA
11
7
2 3
ST
8
4
0
10
76
2 3
ST
98
54
10
DA
11
7
2 3
ST
100M
LK /
P1
X3 X4
TB 3
CH. I / O STATUS
ACT
ACT
CH. I / O STATUS
RUN
X5
X5
X4
X1
GND
34
DC+
31
8
4
0
RUN
DA
LI NK
11
7
ST
LI NK
10
6
DARS
LI NK
911
5
1
RS
LI NK
10
6
RUN
COL
ACT
X5
X3
X2
X1 X2
PG M
PO RT
PUSH TO RESET
ACT
ACT
ETHERNET
Ac r o m a g
CH. I / O STATUS
CH. I / O STATUS
PO WER
RS
RUN
RUN
ETHERNET
SW I TCH
Ac r o m a g
ETHERNET
ETHERNET
Ac r o m a g
Ac r o m a g
ETHERNET
Ac r o m a g
HOSTPC
Acromag9xxEN-4012
EthernetModules.
Theethernetportofthese
modulesarenotautomatic
MDI/MDI-Xcrossover,but
theuseofanauto-crossing
switcheliminatestheneed
tomakeadistinctionbetween
straight-throughandcrossover
cables.
(Straight-ThroughorCrossoverCable)
CAT-5UTP CABLE
UPTO100METERS
(Straight-ThroughorCrossoverCable)
OrderAcromagCableModel 5035-355
CAT-5UTP CABLE
UPTO100METERS
ETHERNET
SWITCH
DI P SW S1/ S2
CFG O PTIO NS
CAT-5UTP CABLE
UPTO100METERS
(Straight-ThroughorCrossoverCable)
(Straight-ThroughorCrossoverCable)
CAT-5UTP CABLE
UPTO100METERS
CAT-5UTP CABLE
UPTO100METERS
TheethernetportofthePCis
generallynotautomaticMDI/MDI-X
crossoverandiswiredMDI.
BecausetheAcromagethernetswitch
900EN-S005isautomaticMDI/MDI-X
crossover,useofadirect(straight-through)
orcrossovercableispermissible.
IMPORTANT: IFTHE HOSTPCCONNECTS DIRECTLY TOTHE MODULE,
YOU MUSTUSE A CROSS-CONNECTCABLE (MDI-X), AS BOTHTHEPC
AND THE 9XXENMODULE ETHERNETPORTS ARE WIREDMDI.
ETHERNETSWITCHES AND HUBS ARE WIRED MDI-X.
THE ACROMAGETHERNETSWITCHIS AUTOMATICMDI/MDI-X AND
ELIMINATES THE NEED FOR MAKINGA DISTINCTION BETWEEN
THE USE OFSTRAIGHT-THROUGH (MDI)ANDCROSSOVER(MDI-X)
CABLE CONNECTIONS.
Acromag900EN-S005
5-PortEthernetSwitch
orequivalent.
Theethernetportsofthis
switchareautomaticMDI/MDI-X
crossinganddonotrequire
crossovercables.
USE OF AN ETHERNET SWITCH TO NETWORK
A HOST PC TO MORE THAN ONE MODULE
Acromag offers a straight-through patch cable (Model 5035-355), or a
crossover cable (Model 5035-360) for use with Series 9xxEN modules.
Refer to the Accessory Cables section at the back of this manual for more
information on accessory cables, including patch and crossover cables
available from Acromag and other vendors.
TIP: You can significantly enhance the EMI/RFI performance of your
network connections by using Category 5E STP cable (Shielded Twisted
Pair) with shielded RJ45 plug connectors. This will also help to protect your
installation from damage due to ESD (Electro-Static Discharge). The use of
shielded cable is strongly recommended for installations in harsh industrial
environments and/or in the presence of strong electrical fields.
You can use an Ethernet switch or switching hub to build a network of
Ethernet modules, similar to that shown below. This drawing shows how to
network-connect Acromag Series 9xxEN modules to a 5-port Ethernet
switch (Acromag Model 900EN-S005). Note that the 900EN-S005 switch
includes automatic MDI/MDI-X crossover and a straight-through or
crossover cable(s) may be used to connect to the modules and the PC.
CONNECTIONS
Network

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
__________________________________________________________________
_______________________________________________________________________________________
Acromag, Inc. Tel:[phone] Fax:[phone] Email:[email protected] http://www.acromag.com
6
R50
-
+
TB1
16
RTN
13
RTN
TB1
-
15
IN03
12
IN01
14
IN02
11
IN00
DCmA
+
ToA/D
ANALOG INPUTS: 0-3
5020-350
SENSOR
BLACKWIRE(-)
REDWIRE(+)
AC CURRENT
963ENSIMPLIFIED
INTERNALCONNECTIONS
(ONECHANNEL)
-
+
R50
TB1
14
IN02
11
IN00
16
RTN
13
RTN
15
IN03
TB1
12
IN01
DCmA
-
ToA/D
+
ANALOG INPUTS: 0-3
2-WIRE
(963EN)
XMTR
DC
PWR
963ENSIMPLIFIED
INTERNALCONNECTIONS
(ONECHANNEL)
+
16 13
RTN
TB1
-
-I
15 12
14 11
IN03
IN01
IN02
+
ANALOG INPUTS: 0-3
TB1
RTN
IN00
R50DCmA ToA/D
DC
(mA)
CURRENT
(963EN)
SHIELDED
CABLE
963ENSIMPLIFIED
INTERNALCONNECTIONS
(ONECHANNEL)
15 12
IN03
IN01 +
14
16 13 11
IN02
RTN
TB1
-
ANALOG INPUTS: 0-3
-RToA/D
TB1
RTN
IN00
100K
R
DC V
+
(964EN)
(Volts) 10.5K
VOLTAGE
SHIELDED
CABLE
964ENSIMPLIFIED
INTERNALCONNECTIONS
(ONE CHANNEL)
✓Connect 15-36V DC to the power terminals labeled DC+ & DC-.
Observe proper polarity. For supply connections, use No. 14 AWG
wires rated for at least 75C. CAUTION: Do not exceed 36VDC peak.
33 31
DC+
32
DC-
PWR
+
TB3
GND
TB3 INPUT POWER
IS ISOLATED
EARTH
GROUND
15 TO 36VDC
IMPORTANT –External Fuse: If unit is powered from a supply capable of
delivering more than 1A to the unit, it is recommended that this current be
limited via a high surge tolerant fuse rated for a maximum current of 1A or
less (for example, see Bel Fuse MJS1).
✓Connect analog input signals to the input terminals as shown below
according to your model.
CONNECTIONS
Power
Voltage
Current
15VDC
113mA
18VDC
96mA
24VDC
74mA
36VDC
54mA
CAUTION: Risk of Electric
Shock –More than one
disconnect switch may be
required to de-energize
equipment before servicing.
Analog Inputs
Input is DC current (963EN),
or DC voltage (964EN).
Inputs share common (RTN)
and are not isolated channel-
to-channel.
Connection To A 2-Wire
Transmitter (963EN Only)
Connection To Acromag AC
Current Sensor 5020-350.

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
___________________________________________________________________
_______________________________________________________________________________________
Acromag, Inc. Tel:[phone] Fax:[phone] Email:[email protected] http://www.acromag.com
7
✓Connect Earth Ground as shown in the connection drawings above.
Additionally, connect the GND terminal (TB3-33) to earth ground.
The ground connections noted are recommended for best results. If
sensors are already grounded, use caution and avoid making additional
ground connections which could create ground loops.
The plastic module housing does not require earth ground.
This module supports Modbus over TCP/IP. You may use your own
software to issue Modbus command to this module (see Modbus Registers),
or you may use a standard web browser to achieve basic functionality. The
963/964EN-4012 modules have built-in web pages that allow you to setup,
control, and calibrate the module via a web browser. Simply execute your
web browser, type the IP address assigned to your module in the “Address”
window (http://128.1.1.100/ for our example), click [Go], and you will be
presented with a Home Page window similar to that shown below:
The Home Page provides buttons to access the other web pages of this
module that are used to configure the network parameters, change the user
name and password, calibrate the module, and operate/test the module.
For each new browser session that accesses the Home Page of this
module, you will be presented with a window prompting you to enter the
current User Name and Password as shown below. This information is
required before the program will allow you to make any other selections.
The default user name and password is “User” and “password00”
respectively. After entering these defaults, you may wish to invoke the
Password Configuration Page to change these parameters to something
more meaningful to you.
Earth Ground
Warning: To comply with
safety and performance
standards, use shielded cable
and connect earth ground as
noted. Failure to use good
wiring and grounding practices
may be unsafe and hurt
performance.
WEB BROWSER
Home Page

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
__________________________________________________________________
_______________________________________________________________________________________
Acromag, Inc. Tel:[phone] Fax:[phone] Email:[email protected] http://www.acromag.com
8
IMPORTANT: If you forget
your user name and
password, you can always
toggle the module into
default mode via the default
mode toggle switch at the
front of the module, and the
password and username will
revert to the original defaults
noted above, thus allowing
you to re-invoke the
Password Configuration
Page and change the
username and password as
required.
Use up to 20 alphanumeric characters (case sensitive) to specify your
username, and 10 alphanumeric characters (case sensitive) to specify a
password. You will have to type in these entries twice to help prevent errors.
Click the submit button to write your changes to the module.
After completing your username/password changes, click on the appropriate
button at the bottom of the page to select another web page. If you made
changes, you may be prompted to re-enter your new username and
password before being permitted to move to other pages.
WEB BROWSER
Home Page
Password
Configuration Page

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
___________________________________________________________________
_______________________________________________________________________________________
Acromag, Inc. Tel:[phone] Fax:[phone] Email:[email protected] http://www.acromag.com
9
After setting your username and password, you can click the “Network
Configuration Page” button to set the network configuration parameters for
the module. You may have to consult your network administrator to
complete the contents of this page.
Use the scroll bar on the right to scroll down the page as shown below:
An IP Address is a unique identification number for any host (this module)
on any TCP/IP network (including the internet). The IP address is made up
of four octets (8 bits), each octet having a value between 0-255 (00H-FFH).
It is expressed here in decimal form, with a period placed between octets.
WEB BROWSER
Network Configuration
Note that Acromag series
9xxEN Ethernet I/O modules
may take from 3 to 30 seconds
to boot upon power-up,
depending on your network
configuration and whether a
DHCP server is present.

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
__________________________________________________________________
_______________________________________________________________________________________
Acromag, Inc. Tel:[phone] Fax:[phone] Email:[email protected] http://www.acromag.com
10
A Static IP Address is as the name implies—static, and represents a unique
fixed IP Address that is generally assigned by your service provider or
system administrator. The default mode static IP address assigned to this
module is 128.1.1.100 (refer to product side label).
NOTE: In order to network your PC with an Acromag module, you may have
to consult with your network administrator and either temporarily change
your TCP/IP configuration (see TCP/IP Properties of Network Configuration
in Windows), or create a separate private network using a second network
adapter installed in your PC (recommended). The necessary steps will vary
with your operating system. Refer to Acromag Application Note 8500-734 to
help accomplish this (located on the CDROM shipped with your module or
via download from our web site at www.acromag.com).
The Number of Sockets refers to the number (1-10) of Modbus TCP/IP
access points to allow for this host. The default allows up to 10 sockets, but
you can restrict access by reducing this number. Internally, the module uses
port number 502 which is reserved for Modbus.
The DNS Server refers to the IP address of the Domain Name Server used
on this network. A DNS server relates symbolic names to actual IP
addresses, while the DHCP server is responsible for dynamically passing out
IP addresses.
A Subnet Mask is used to subdivide the host portion of the IP address into
two or more subnets. The subnet mask will flag the bits of the IP address
that belong to the network address, and the remaining bits correspond to the
host portion of the address. The unique subnet to which an IP address
refers to is recovered by performing a bitwise AND operation between the IP
address and the mask itself, with the result being the sub-network address.
Gateway refers to the IP Address of the gateway, if your local area network
happens to be isolated by a gateway. If a gateway is not present, then this
field should contain an unused address within the host subnet address
range. Typically, it is assigned the first host address in the subnet.
The Host Name is the name to be assigned to this host if its address
happens to be assigned dynamically using DHCP.
The Active IP Address refers to the current IP Address being used by this
host, as opposed to any new assignments being made via this page.
The MAC Address refers to the Media Access Control Address that
uniquely identifies the hardware of this device. This is a unique fixed
address assigned to this module at the factory. In IEEE 802 networks, the
Data Link Control (DLC) layer of the OSI Reference Model is divided into two
sublayers: the Logical Link Control (LLC) layer, and the Media Access
Control (MAC) layer. The MAC layer interfaces directly with the network
media (each different type of network media requires a different MAC layer).
By default, the module is setup to use Static IP Addressing and a Static IP
Address of 128.1.1.100. You can optionally choose to have the IP address
assigned dynamically via DHCP/BOOTP or DHCP/BOOTP w/Fallbacks.
This will also require that you specify a valid Host Name. Note that
DHCP/BOOTP w/Fallback will revert to the static IP address if your DHCP or
BOOTP server cannot be found at the address specified.
WEB BROWSER
Network Configuration
This module can be placed
into a default communication
mode via the DFT toggle
switch at the front of the
module.
Default Mode uses a static IP
address of “128.1.1.100”, a
default subnet mask of
“255.255.255.0”, a default
username “User”, and a
default password
“password00”.

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
___________________________________________________________________
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Acromag, Inc. Tel:[phone] Fax:[phone] Email:[email protected] http://www.acromag.com
11
In general, BOOTP (Bootstrap Protocol) refers to an internet protocol that
enables a diskless workstation to discover its own IP address, the address of
a BOOTP server on the network, and a file to be loaded into memory to boot
the machine. This enables the workstation or device server to boot without
requiring a hard or floppy disk drive. BOOTP works similar to DHCP, but is
usually found in older systems. This protocol is defined by RFC 951.
DHCP (Dynamic Host Configuration Protocol) refers to a protocol for
assigning dynamic IP addresses to devices on a network. With dynamic
addressing, a device can have a different IP address every time it connects
to the network. In some systems, it can even change while it is still
connected. DHCP also supports a combination of static and dynamic IP
addresses. DHCP/BOOTP with fallback will revert to static IP addressing if
the DHCP or BOOTP server cannot be found.
The unit includes a default address toggle switch to cause the module to
assume a preset default factory address. This switch is at the front of the
module and is used to toggle the module into, or out of Default Mode. If you
use the toggle switch at the front of the module to place the module in
default mode, then “Default Communications Mode” will be indicated at the
bottom of this screen.
Click the Submit button to complete any changes made on this page.
Click the Wink On/Off button to toggle the module in/out of “wink” ID mode.
In this mode, the module’s green RUN LED will blink to confirm identification.
Refer to the Technical Reference section of this manual to learn more about
IP Addressing terms and concepts.
After completing your username and password assignment, plus your
network configuration parameters, you can use the Test Page to operate
your module. The Test Page will allow you to read inputs and change input
ranges on this model.
WEB BROWSER
Network Configuration
The Default Communication
Mode uses a static IP address
of “128.1.1.100”, a default
subnet mask of
“255.255.255.0”, a default
username of “User”, and a
default password of
“password00”.
WEB BROWSER
Test Page

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
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12
Use the scroll bar on the right to scroll down the page as shown below:
Note that the 12 channels of this module are divided into 3 groups (ports) of
4 channels each. Each port represents one pluggable I/O terminal block (6
screws). Port Number 0 refers to channels 0-3, port number 1 refers to
channels 4-7, and port number 3 to channels 8-11. Input signals for each
channel are indicated to 3 decimal places as shown.
IMPORTANT: The input level indicated only reflects the level of the inputs
at the moment this screen is invoked and this does not continuously update.
You can click your browser’s refresh button to get a new input update.
You can also use the Port Configuration Control of this page to change the
input range for the channels on a port-by-port basis. For the 964EN shown,
you may select from bipolar voltage ranges ±1V, ±5V, or ±10V. For the
963EN, you could choose 0-20mA, 4-20mA, 0-11.17mA, or 0-1mA. Note
that the 0-11.17mA range is intended to be used with an optional AC current
sensor (Acromag Model 5020-350) which will output 0-11.17mADC for
various 50-60Hz AC current ranges.
Note that your range selection will apply to all channels of the entire port
(group of four channels). Click on “submit” to execute your range change.
WEB BROWSER
Test Page
TIP: Viewing a module’s web
page is treated similar to
viewing a web page on the
internet. The first time you
open a page, its image is
stored as a temporary internet
file in PC memory. However,
each subsequent attempt to
view that page will need to
automatically update that
image, especially when
making configuration changes.
With Internet Explorer, click
the “Internet Options” of the
“Tools” menu, select the
“General” tab, locate the
“Temporary Internet Files”
information and click on the
“Settings” button. Then select
“Automatically” under “Check
for newer versions of stored
pages:”. Then click [OK] to
return to the “General” screen,
and click [OK] again to save
your settings.

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
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13
The Calibration Page will allow you to recalibrate each channel’s zero and
span signal as required. Simply select the channel to be calibrated, choose
zero or span (zero first), apply the zero or full-scale signal to the input, then
click calibrate. For best results, always calibrate zero before span.
Use the scroll bar on the right to scroll down the page as shown below:
The following table gives the calibration values for these models. These
represent the input signals required to calibrate the range endpoints. Your
success in recalibrating the input will depend upon the accuracy and
precision of your signal source.
WEB BROWSER
Calibration Page
IMPORTANT: This module
has already been calibrated at
the factory and recalibration is
not normally required, except
as necessary to correct for
long term component aging, or
to satisfy your company’s
maintenance requirements.
Do not attempt to recalibrate
this module unless absolutely
required, as miscalibration will
negatively affect the module’s
performance.
Note: You may click the
Restore Factory Calibration
button to return all module
channels to their original
factory calibration if calibration
has been compromised (all
channels are restored
together).

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
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Acromag, Inc. Tel:[phone] Fax:[phone] Email:[email protected] http://www.acromag.com
14
If recalibration of any input is required, all applicable ranges of both models
should be done. On the 963EN-4012, the 4-20mA input range is a sub-
range of the 0-20mA range and is automatically calibrated at the same time.
INPUT RANGE
ZERO Cal (Cal Lo)
FS Cal (Cal Hi)
963EN-4012 (12 Current Inputs)
0 to 20mA & 4 to 20mA
1.0mA
20.0mA
0 to 11.17mA
1.0mA
11.17mA
0 to 1mA
0.25mA
1.00mA
964EN-4012 (12 Voltage Inputs)
-10V to +10V DC
-10.0V
+10.0V
-5V to +5V DC
-5.0V
+5.0V
-1V to +1V DC
-1.0V
+1.0V
IMPORTANT: For best results, be sure to use a precision signal source
capable of reproducing the nominal endpoint signals at least as accurate as
the module itself (better than ±0.1% of span). Always allow the module to
warm up a few minutes prior to calibration.
Method 1 –Calibration Using The Built-In Browser Interface:
1. Make sure that the range that needs calibrating is currently selected.
2. Bring up the browser interface and select the calibration page.
3. Apply either the zero or span input signal to the channel to be calibrated.
Calibrate the zero endpoint signal first, before the span endpoint signal.
4. Wait about 10 seconds for the input to settle and be read.
5. Click on the channel number and select either zero or span calibration.
6. Click the “Calibrate” button. The page will first refresh & then calibration
may continue. Repeat this process for the other endpoint (span).
7. Repeat steps 2-5 for the other input channels to be calibrated.
Method 2 - Calibration Via The Modbus TCP/IP Interface:
1. Write to the appropriate Port Input Range Register to select the input
range to be calibrated for your channel of interest.
2. Write 24106 (5E2AH) into the Calibration Access Register to remove
write protection from the calibration registers.
3. Apply the zero calibration signal (Cal Lo, see table) to the input to be
calibrated and allow the input to settle about 10 seconds.
4. Write a 16-bit value to the Zero Calibration Register with a set bit in the
bit position that corresponds to the channel number to be calibrated (one
channel at a time). If you were calibrating the zero of channel 5, you
would write 0x0010 to the Zero Calibration Register. The module will
replace calibration coefficients immediately, no reset needed.
5. Apply the full-scale calibration signal (Cal Hi, see table) to the input to be
calibrated and allow the input to settle about 10 seconds.
6. Write a 16-bit value to the Span Calibration Register with a set bit in the
bit position that corresponds to the channel number of the channel to be
calibrated (one channel at a time). For example, if you wanted to
calibrate the span of channel 0, write 0x0001 to the “Span Cal Register”.
7. Write to the Port Input Range Register to select the next range to be
calibrated for this channel. Repeat steps 3-6 for the next range as
required.
8. Repeat steps 3-7 for the other channels as required.
9. When finished calibrating, write 0x0000 to the Calibration Access
Register (Holding register 21) to replace write protection to the
calibration registers and prevent miscalibration.
WEB BROWSER
Note (963EN): The 4-20mA
range is calibrated when the 0-
20mA range is calibrated and
is not calibrated separately.
All other ranges are calibrated
separately.
Input Calibration
You can choose to use the
web browser calibration page
to accomplish calibration
(easiest), or via direct register
access as described below.

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
___________________________________________________________________
_______________________________________________________________________________________
Acromag, Inc. Tel:[phone] Fax:[phone] Email:[email protected] http://www.acromag.com
15
Upon power-up, the green “Run” LED will turn ON. A continuous blinking
Run LED indicates “wink” ID mode. If the Run LED remains OFF and
correct power has been applied, then either the internal power supply has
failed or a fatal error has occurred.
SYMPTOM
POSSIBLE CAUSE
POSSIBLE FIX
Green RUN LED
does not light.
Internal +3.3V power
has failed.
Return module for repair.
Continuous flashing
green RUN LED.
Module in “wink”
mode.
Read Module Status register
to verify “wink” status. Write
5555H to Wink Mode
Toggle Register to toggle
wink mode off/on.
Cannot
communicate.
Power ON at the
module?
Check power. Is green
RUN LED ON?
Connecting cable is
not a crossover
cable.
TIP: To check cable,
hold both ends in
same position and
read the wire colors
through the clear
portion of the plug
from left to right. If
colors are arranged in
the same order, you
have a straight cable.
This module’s ethernet port
is wired MDI. You must use
a crossover cable when
connecting this module to
your PC or another device
also wired MDI. If you are
connecting to an Ethernet
switch or hub, then a direct
cable is used.
Note: If your Link LED is
ON, you have connected
using the correct type of
cable, but it could still be
defective.
Wrong IP Address
Change the IP address of
the module or the PC so
that both match. Try the
default module address of
128.1.1.100.
Many
Communication
Errors.
Is cable segment
longer than 100M?
Maximum distance between
two nodes is limited to 100
meters using approved
cable.
Correct Cable?
Shielded CAT-5/5E cable or
equivalent is recommended.
Missing earth ground
connection.
Connect earth ground to
TB3-33 GND terminal
adjacent to power terminal.
Cannot Browse
Module.
Your browser may be
setup to use a proxy
server for LAN
communications.
Temporarily disable the use
of a proxy server by your
browser (see procedure of
next page).
TROUBLE-
SHOOTING
Diagnostics Table
If your problem still exists after
checking your wiring and
reviewing this information, or if
other evidence points to
another problem with the unit,
an effective and convenient
fault diagnosis method is to
exchange the module with a
known good unit. Acromag’s
Application Engineers can
provide further technical
assistance if required.
Complete repair services are
also available from Acromag.

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
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Acromag, Inc. Tel:[phone] Fax:[phone] Email:[email protected] http://www.acromag.com
16
Please refer Acromag Application Note 8500-734 for help in setting up
network communication with your module (located on the CDROM shipped
with your module or via download from our web site at www.acromag.com).
This document gives details for changing your PC’s TCP/IP configuration in
order to communicate with your module (see TCP/IP Properties of Network
Configuration in Windows).
If you have carefully followed this procedure and you still cannot browse your
module, you may have the web browser of your laptop or PC setup to use a
proxy server when browsing the web. If you are using Internet Explorer,
Refer to the “Tools” pulldown menu, select “Internet options…”, click the
“Connections” tab, then click the “LAN Settings” button. Locate the Proxy
server information and uncheck the box next to the statement “Use a proxy
server for your LAN”. Then click [OK] to return to the “Connections” screen,
and click [OK] again to save your settings.
You should now be able to use Internet Explorer to browse the module as
required. However, to later restore your PC’s connection to your company
network, you may have to re-enable the use of a proxy server for your LAN.
There is no built-in error detection to prevent you from writing invalid values
to a configuration register. As such, if you inadvertently write an invalid value
to an internal register, you could cause the module to become inoperable
under certain conditions. If this happens, in order to regain control of the
module, the module can either be re-downloaded at the factory, or you can
try restoring the module to its initial configuration by following this procedure:
Procedure For Restoring any 9xxEN Module to its Initial Configuration
1. While module power is OFF, press and hold the front-panel toggle
switch in the default (DFT left) position.
2. While continuing to hold the toggle switch in the default position, apply
power to the module.
3. After a few seconds, the Status LED will begin to blink quickly and you
can release the default switch at this point. The module will continue to
boot itself as it normally does. That is, the green RUN LED will blink for
1-10 seconds as the unit acquires its address, then remain ON for
normal operation.
4. If the STATUS LED fails to blink rapidly after a few seconds and the
RUN LED just blinks for a few moments as it normally does, then
reinitializing the module has failed and you should try it again. This
time, make sure that the DFT switch is completely depressed and held
while powering the unit. Also make sure that you are pressing the DFT
toggle in the DFT direction (left), rather than the RST direction (right).
TROUBLE-
SHOOTING
Trouble Browsing Your
Module?
Getting Out Of Trouble
So, your module’s “gone wild”,
follow this procedure to restore
it to its initial configuration and
regain control.

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
___________________________________________________________________
_______________________________________________________________________________________
Acromag, Inc. Tel:[phone] Fax:[phone] Email:[email protected] http://www.acromag.com
17
TECHNICAL REFERENCE
•Safety Agency Approvals –CE, UL, & cUL listed, plus Class I; Division
2; Groups A, B, C, D approval.
•Fully Isolated –Input channels (as a group), network, and power are all
isolated from each other for safety and increased noise immunity.
•Modbus TCP/IP Protocol Support –Supports up to 10 sockets/
masters (maximum number is user-selectable) using port number 502
(standard Modbus TCP/IP default).
•Built-In Web Pages - Allows unit to optionally be configured, controlled,
calibrated, and monitored via access with a standard web browser over
ethernet.
•Convenient “Wink” ID Mode Support –Blinks green RUN LED in wink
mode as a tool to help identify specific remote units.
•Fully Independent w/ Direct I/O Connection –Self-contained with no
special bus couplers, power supply, or mount rack required to operate.
•Network Port is Transient Protected –Shielded RJ45 port includes
transient protection from ESD, EFT, and other transients.
•10Base-T and 100Base-TX Support –Per IEEE 802.3/802.3u.
•Auto-Negotiated 10/100Mbps, Half or Full Duplex.
•Flexible Multi-Range Analog Inputs –Select either DC current or DC
voltage input signals according to your model.
•Port-to-Port Range Variability –Each terminal port (group of 4
channels) can have different ranges configured, but channels of the
same port must share the same range.
•Optional AC Current Input (963EN Only) –An optional AC current
sensor can be purchased separately to support AC current inputs.
•Precise High-Resolution A/D Conversion –Modules use high-
resolution, low noise, sigma-delta, analog-to-digital conversion for high
accuracy and reliability.
•Plug-In Terminal Blocks & DIN-Rail Mount - Make mounting, removal,
and replacement easy.
•Nonvolatile Reprogrammable Memory –Allows the functionality of this
device to be reliably reprogrammed thousands of times.
•Operation/Diagnostic LED Indicators Aide Troubleshooting –Yellow
ACT LED indicates port activity (busy). Green LNK LED indicates link
(auto-negotiation complete and connection established). Green RUN
LED indicates power or blinks in wink ID mode. Yellow ST LED
indicates default communication mode (blinks) and input over/under-
range (constant ON).
•Built In Hardware Watchdog - A hardware watchdog timer is built into
the microcontroller that causes it to initiate a self reset if the controller
ever “locks up” or fails to return from an operation in a timely manner.
•Wide-Range DC-Power –Wide range diode-coupled for use with
redundant supplies, and/or battery back-up.
•Hardened For Harsh Environments - For protection from RFI, EMI,
ESD, EFT, & surges. Has low radiated emissions per CE requirements.
•Wide Ambient Operation –Reliable over a wide temperature range.
KEY FEATURES

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
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Acromag, Inc. Tel:[phone] Fax:[phone] Email:[email protected] http://www.acromag.com
18
6
3
8
7
2
1
4
5
CH10
CH8
CH6
CH4
CH2
CH0
+5V
+3.3V RTC
STA
+3.3V+3.3V
ACT LINK
+3.3V
+3.3V
GND
IN10
IN11
IN08
IN09
RTN
IN07
RTN
IN05
IN02
IN03
IN00
IN01
CH11
CH9
CH3
CH1
-6V
-6V+6V
-6V
+6V
+6V
AIN3
5V ISOLATED
FLYBACK
SWITCHER
RJ45
RTN
RTN
IN06
RTN
RTN
IN04
CH7
CH5
M
U
X
M
U
X
AIN1
AIN2
P
O
W
E
R
M
U
X
RUN
+3.3V
DC-
PORT2
I/O
POWER
TOGGLE
SWITCH
MICRO
CONTROLLER
3.3V
VRAM
DC+
PORT3
PORT1
I/O LOGIC
POWER
+5V Ethernet Port Includes
ESD Protection
ISOLATED ETHERNET
1.6V BIAS
FOR BIPOLAR
ISOLATED INPUT POWER
SRAM
(512Kx8)
A/D
CONVERTER
ETHERNET
CONTROLLER
FLASH
(512Kx8)
15-36VDC
ALLINPUTSOFAPORT
MUSTBESAMERANGE
963/964ENSIMPLIFIEDSCHEMATIC
These input modules will interface with up to twelve analog input channels of
DC current or DC voltage according to the model number, and provide an
isolated 10/100 Ethernet interface for configuration, monitoring, and control
of the input module. The 963EN will also condition AC current input signals
when used with an optional AC current sensor (Acromag Model 5020-350).
Input channels are arranged in three groups (ports) of four inputs, which are
driven to separate channels of the A/D converter. Because each port feeds
a different A/D channel, each channel of the port must have the same input
range. However, different ports may use different input ranges. Current
inputs sink into a precision 50Ω resistor (963EN). Voltage inputs feed
precision 10:1 resistive dividers (964EN). A multiplexer is used to connect
the voltage from each channel of a port to a channel of the A/D converter
(one A/D channel per port). The A/D converter then applies gain to the
signal, converts the analog signal to digital, and then digitally filters the
signal. The digitized signal is then transmitted serially to the microcontroller.
The microcontroller completes the transfer function according to the input
type and range per its embedded program. Configuration and calibration
parameters are stored in non-volatile memory integrated within the
microcontroller. The I/O terminals and the Ethernet port terminals also
include transient suppression. A dedicated Ethernet controller handles
Ethernet communication. A wide input switching regulator (isolated flyback)
provides isolated power to the I/O circuits and the Ethernet controller. Refer
to the simplified schematic shown below to help gain a better understanding
of the circuit.
HOW IT WORKS

BusWorks® 963/964EN Module User’s Manual Modbus TCP/IP Analog Input
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Acromag, Inc. Tel:[phone] Fax:[phone] Email:[email protected] http://www.acromag.com
19
Checksum
TCP FRAME
MODBUS FRAME
Transaction Identifier Modbus FrameLength FieldProtocol Identifier
DataAddress Function Code
Modbus Checksum
Not Included
TCP/IP refers to Transmission Control Protocol and Internet Protocol.
TCP/IP allows blocks of binary data to be exchanged between computers.
TCP/IP is everywhere and is the foundation for the World Wide Web. The
primary function of TCP is to ensure that all packets of data are received
correctly. IP makes sure that messages are correctly addressed and routed.
Note that the TCP/IP combination does not define what the data means or
how the data is to be interpreted, it is merely a transport protocol.
Modbus is an application protocol. It defines rules for organizing and
interpreting data and is essentially a messaging structure that is independent
of the underlying physical layer. It is freely available and accessible to
anyone, easy to understand, and widely supported by many manufacturers.
Modbus TCP/IP uses TCP/IP and Ethernet to carry the data of the Modbus
message structure between devices. That is, Modbus TCP/IP combines a
physical network (Ethernet), with a networking standard (TCP/IP), and a
standard method of representing data (Modbus). In effect, a Modbus
TCP/IP message is simply a Modbus communication encapsulated in an
Ethernet TCP/IP wrapper.
In practice, Modbus TCP embeds a Modbus data frame into a TCP frame,
sans the Modbus checksum, as shown in the following diagram. The
Modbus checksum is not used, as the standard ethernet TCP/IP link layer
checksum methods are instead used to guaranty data integrity.
Note that the Modbus address field is referred to as the Unit Identifier in
Modbus TCP. In a typical slave application, the Unit ID is ignored and just
echoed back in the response.
The operation of the 963/964EN industrial Ethernet modules is very similar
to Acromag’s 913/914MB ModBus modules. The operation over Ethernet is
essentially transparent to the Modbus register/command structure. If you
are already familiar with Modbus or with Acromag Series 900MB modules,
then you are already familiar with the operation of the 963/964EN modules.
A host is any device on any network. On TCP/IP networks, each host has
one or more unique IP addresses. This module connected to an ethernet
network is a host.
An IP Address is a unique identification number for any host (this module) on
any TCP/IP network (including the internet). The IP address is made up of
four octets (8 bits), each octet having a value between 0-255 (00H-FFH).
The IP address is comprised of two parts: the network address (first part)
and the host address (last part). The number of octets of the four total that
belong to the network address depend on the Class definition (see below).
ABOUT MODBUS
TCP/IP
You can find more information
on Modbus TCP/IP by visiting
our web site and down-loading
whitepaper 8500-765,
Introduction To Modbus
TCP/IP.
IP Addressing