Acces WM-IIRO-8 User manual
1
10623 Roselle Street, San Diego, CA 92121 C(858) 550-9559 CFax (858) 550-7322
MODEL WM-IIRO-8
USER MANUAL
2Manual WM-IIRO-8
Notice
The information in this document is provided for reference only. ACCES does not assume any liability arising
out of the application or use of the information or products described herein. This document may contain or
reference inform ation and products protected by copyrights or patents and does not convey any license under
the patent rights of ACCES, nor the rights of others.
IBM PC, PC/XT, and PC/AT are registered trademarks of the International Business Machines Corporation.
Printed in USA. Copyright 2005 by ACCES I/O Products Inc, 10623 Roselle Street, San Diego, CA 92121.
All rights reserved.
WARNING!!
ALWAYS CONNECT AND DISCONNECT YOUR FIELD CABLING WITH
THE COMPUTER POWER OFF. ALWAYS TURN COMPUTER POWER
OFF BEFORE INSTALLING A CARD. CONNECTING AND
DISCONNECTING CABLES, OR INSTALLING CARDS INTO A SYSTEM
WITH THE COMPUTER OR FIELD POWER ON MAY CAUSE DAMAGE
TO THE I/O CARD AND WILL VOID ALL WARRANTIES, IMPLIED OR
EXPRESSED.
3Manual WM-IIRO-8
Warranty
Prior to shipment, ACCES equipment is thoroughly inspected and tested to applicable specifications.
However, should equipment failure occur, ACCES assures its customers that prompt service and support
will be available. All equipment originally manufactured by ACCES which is found to be defective will be
repaired or replaced subject to the following considerations.
Terms and Conditions
If a unit is suspected of failure, contact ACCES' Custom er Service departm ent. Be prepared to give the unit
model number, serial number, and a description of the failure symptom(s). We may suggest some simple
tests to confirm the failure. We will assign a Return Material Authorization (RMA) number which must appear
on the outer label of the return package. All units/components should be properly packed for handling and
returned with freight prepaid to the ACCES designated Service Center, and will be returned to the
customer's/user's site freight prepaid and invoiced.
Coverage
First Three Years: Returned unit/part will be repaired and/or replaced at ACCES option with no charge for
labor or parts not excluded by warranty. Warranty com mences with equipment shipm ent.
Following Years: Throughout your equipment's lifetime, ACCES stands ready to provide on-site or in-plant
service at reasonable rates sim ilar to those of other manufacturers in the industry.
Equipment Not Manufactured by ACCES
Equipment provided but not manufactured by ACCES is warranted and will be repaired according to the
terms and conditions of the respective equipment manufacturer's warranty.
General
Under this Warranty, liability of ACCES is limited to replacing, repairing or issuing credit (at ACCES
discretion) for any products which are proved to be defective during the warranty period. In no case is
ACCES liable for consequential or specialdamage arriving from use or misuse of our product. The customer
is responsible for all charges caused by modifications or additions to AC CES equipment not approved in
writing by ACCES or, if in ACCES opinion the equipm ent has been subjected to abnormal use. "Abnormal
use" for purposes of this warranty is defined as any use to which the equipment is exposed other than that
use specified or intended as evidenced by purchase or sales representation. Other than the above, no other
warranty, expressed or implied, shall apply to any and all such equipment furnished or sold by ACCES.
4Manual WM-IIRO-8
Table of Contents
Chapter 1: Introduction ............................................... 5
Functional Description .....................................................5
Figure 1-1: Block Diagram ............................................... 6
Chapter 2: Installation ................................................ 7
Chapter 3: Option Selection ........................................... 8
Figure 3-1: Option Selection Map ........................................... 8
Table 3-1: WM-IIRO-8 Screw Terminal Connections ............................ 9
Chapter 4: Software ................................................. 11
General ...............................................................11
Command List ..........................................................12
Command Functions .....................................................13
Error Codes ............................................................18
Chapter 5: Specification .............................................. 19
5Manual WM-IIRO-8
Chapter 1: Introduction
Features
•RS232 Serial Interface to Host Computer.
•900 MHz Wireless Connection Between Host Computer Modem and W M-IIRO-8.
•8 Optically-Isolated, Non-Polarized Digital Inputs with Change of State(COS) Detection.
•8 SPDT Electro-Mechanical Relay Outputs that Switch Up to 1 Amp Each.
•Digital Outputs May Be Either Level or Pulsed.
•Type 8031 Microcontroller with 8K RAM and 8K EEPROM. (32K X 8 optional)
•Ability to Program with Custom Firmware over Wireless Connection
•NEMA4 Enclosure for Harsh Atmospheric or Marine Environments.
Functional Description
The WM-IIRO-8 is an intelligent 8-bit parallel digital I/O unit that communicates with ACCES’s
Wireless Serial Modem via a 900 MH z wireless connection. The W ireless Serial Modem connects
to a host computer’s standard COM port using an RS232 (or RS485) serial communications protocol.
Both the WM-IIRO-8 and the W ireless Serial Modem are packaged in NEMA4 enclosures for remote
installation in harsh environments. ASCII-based comm and/response protocol permits communication
with virtually any computer system. It can operate at baud rates up to 9600 baud at distances up to
7 miles line-of-sight.
The 8 isolated inputs can be driven by either AC or DC signals and are not polarity sensitive.
Input signals are rectified by photocoupler diodes. Standard 12/24 AC control transformer
outputs can be accepted as well as DC voltages. The input voltage range is 3 to 28 volts (rms).
Unused power dissipates through a 1.8KSresistor. External resistors connected in series with
this may be used to extend the input voltage range. Each input circuit contains a switchable
slow/fast filter that has a 4.7 ms time constant. (Without filtering, the response is 10 :s) The filter
must be selected for AC inputs in order to eliminate response to zero crossings, however, it is
also valuable for use with slow DC signals in a noisy environment. A filter is individually selected
when a jumper is installed onto any of the positions ‘FILTER 0' thru ‘FILTER 7'.
The electro-mechanical relay outputs may be programmed individually or as an 8-bit byte. These
outputs may be latched, pulsed, or set to free-run for a prescribed period of time. The relays are
Form C, SPDT, and are de-energized at power-on.
Atype 8031 microcontroller (with 8K x 8 RAM, 8K x 8 non-volatile EEPROM, and a watchdog timer
circuit) gives the WM-IIRO-8 the capability and versatility expected from a modern distributed control
system. To accommodate special programs, the RAM and EEPROM can each be expanded to 32K
x 8.
The built-in watchdog timer resets the pod if the microcontroller "hangs up". Data collected by the
pod can be stored in local RAM and accessed later through the computer's serial port. This
facilitates stand-alone operation.
The module, or pod, address is program mable from 00 to FF hex. W hatever address is assigned to
the pod gets stored in EEPROM and used as the default address at the next Power-ON. The use of
module addressing allows as many as 256 W M-IIRO-8 units may be connected to a single host
computer & wireless serial modem.
6Manual WM-IIRO-8
Figure 1-1: Block Diagram
7Manual WM-IIRO-8
Chapter 2: Installation
POWER
WM-IIRO-8 Plug the provided AC wall adaptor to any standard AC wall outlet.
WIRELESS SERIAL MODEM
Laptops: Plug the provided AC wall adaptor to any standard AC wall outlet.
Desktops: Install the provided two section power cable. The Molex ~ DB 9-F cable
section goes inside the host computer. The DB9-M ~ Modem cable goes
outside the host com puter.
SERIAL COMMUNICATION
Plug the provided DB9-F / Modem cable into one of the host computer’s COM Ports. The COM
Port selected MUST be configured for the following settings:
Protocol: RS232
Baud Rate: 9600
Data Bits: 7
Parity: Even
Stop Bits: 1
VERIFY INSTALLATION
1. Locate and run AC CES’ WINRISC.EXE application program (easy-to-use serial
com munication terminal program ) on the CD-ROM provided at :\disks\Tools.win\W IN32\.
2. Match the pull-down menu settings to the appropriate ‘Port’ and above configuration.
3. Click the “Connect” button to connect the application to the Wireless Serial Modem then
click the cursor into the large “data” area of the WINRISC window.
4. Type “?” and press enter. A “Main Help Screen” will be returned if the two units have
been installed properly.
8Manual WM-IIRO-8
Chapter 3: Option Selection
FILTER RESPONSE SWITCH
Jumpers are used to select input filtering on a channel-by-channel basis. When jumper FLT0 is installed,
additional filtering is introduced for input bit 0, FLT1 for bit 1, etc. This additional filtering must be used
when AC inputs are applied.
JUMPER
SELECTION Bit Filtered
FLT-0
FLT-1
FLT-2
FLT-3
FLT-4
FLT-5
FLT-6
FLT-7
IN00
IN01
IN02
IN03
IN04
IN05
IN06
IN07
Figure 3-1: Option Selection Map
9Manual WM-IIRO-8
Connections
The signal assignment to each of the screw terminal board’s pins are as follows:
‘Isolated Input’
Terminal Block PCB
Signal ‘Relay Output’
Terminal Block PCB
Signal
1GND 1Relay 7 - normally closed
2GND 2Relay 7 - common
3+PWR* 3Relay 7 - normally open
4+PWR* 4Relay 6 - normally closed
5N/C 5Relay 6 - common
6N/C 6Relay 6 - normally open
7N/C 7Relay 5 - normally closed
8N/C 8Relay 5 - common
9N/C 9Relay 5 - normally open
10 N/C 10 Relay 4 - normally closed
11 Isolated Input 7 B 11 Relay 4 - common
12 Isolated Input 7 A 12 Relay 4 - normally open
13 Isolated Input 6 B 13 N/C
14 Isolated Input 6 A 14 N/C
15 Isolated Input 5 B 15 Relay 3 - normally closed
16 Isolated Input 5 A 16 Relay 3 - common
17 Isolated Input 4 B 17 Relay 3 - normally open
18 Isolated Input 4 A 18 Relay 2 - normally closed
19 Isolated Input 3 B 19 Relay 2 - common
20 Isolated Input 3 A 20 Relay 2 - normally open
21 Isolated Input 2 B 21 Relay 1 - normally closed
22 Isolated Input 2 A 22 Relay 1 - common
23 Isolated Input 1 B 23 Relay 1 - normally open
24 Isolated Input 1 A 24 Relay 0 - normally closed
25 Isolated Input 0 B 25 Relay 0 - common
26 Isolated Input 0 A 26 Relay 0 - normally open
Table 3-1: WM-IIRO-8 Screw Terminal Connections
10 Manual WM-IIRO-8
+PW R*: Power is power from a local power supply. The voltage can be
anywhere from 7.5 VDC to 16 VDC. Higher local power, 24 VDC
for example, can be used if an external zener diode is used to
reduce the voltage applied to RIOD24. (See Temperature de-rating
com ments in the Specification section of this manual under "Power
Required".)
11 Manual WM-IIRO-8
Chapter 4: Software
General
You received ASII-based software on CD for use with WM-IIRO-8. ASCII programming permits you
to write applications in any high level language that supports ASCII string functions.
The comm unication protocol has two forms: addressed and non-addressed. Non-addressed protocol
can be used when only one W M-IIRO-8 is in use. When more than one module (pod) is in use,
addressed protocol must be used. The only difference is that an address com mand is sent to enable
the specific pod. The address command is only sent once during communication between the pod
and the host com puter. It enables communication with that specific pod and disables all other pods
on the network.
Command Structure
All communication must be 7 data bits, even parity, 1 stop bit. All numbers sent to or received from
the pod are in hexadecimal form. The factory default baud rate is 9600 Baud. The pod is considered
to be in addressed mode any time its pod address is not 00. The factory default pod address is 00
(non-addressed m ode).
Addressed Mode
The address select command must be issued before any other command to the addressed pod. The
address command is as follows:
"!xx[CR]" where xx is the pod address from 01 to FF hex, and [CR] is Carriage Return, ASCII
character 13.
The pod responds with "xxN[CR]" or "xxY[CR]" if an input change of state has occurred on enabled
bits since the last "Y" or address command, or with "xxN[CR]" otherwise.
Once the address select command has been issued, all further commands (other than a new address
select) will be executed by the selected pod. The addressed mode is required when using more than
one pod.
Non-Addressed Mode
When there's only one pod connected, no address select command is needed. You can merelyissue
commands listed in the following table. Terminology used is as follows:
a. The single lower case letter 'x' designates any valid hex digit (0-F).
b. The single lower case letter 'b' designates either a '1' or '0'.
c. The symbol '±' designates either a '+' or a '-'.
d. All commands are terminated with CR, the ASCII character #13.
e. Wherever xx is used to designate a bit number, only 00-07 are valid.
f. All commands are case insensitive; i.e., upper or lower case letters can be used.
g. The symbol '*' means zero or more valid characters (total msg length <255 decimal).
12 Manual WM-IIRO-8
Command List
I Read all 8 digital bits. xxCR
Ixx Read a single digital bit. (00<=xx<=07) bCR
Oxx0xx Output all 8 digital bits. CR
Ox± Output either high or low on bit x CR
Oxx± Output either high or low on bit xx CR
Ox±xx Output either high or low on bit x for time xx CR
Oxx±xx Output either high or low on bit xx for time xx CR
Y Read digital input COS bit and clear bit Y or N
Txx Set bit 00-07 Mask for COS bit flag, 1=change will set COS CR
Dx± Set digital input active state high or low on bit x CR
Dxx± Set digital input active state high or low on bit xx CR
Cxx Read digital input xx counter (counts each active pulse) xxCR
or Read pulse/free-run output xx counter and reload value xxCR
Rxx Reset digital input counter xx to 0000 CR
Rall Reset all digital input counters to 0000 CR
V Read the Firmware version num ber x.xxCR
N Resend last response varies
H* Greeting message: copyright, firmware version num ber varies
BAUD=xxx Set new baud rate. Each x is code number for new baud =:Baud:0x
POD=xx Set pod address to xx varies
PROGRAM= Begin process of uploading custom program to pod special
D Download historical storage of digital input data again varies
FASTDATA Acquire bits 0-7 as fast as possible, then display varies
13 Manual WM-IIRO-8
Command Functions
The following paragraphs give details of the command functions, describe what the commands
cause, and give examples. Please note that all commands have an acknowledgment response. You
must wait for a response from a command before another com mand is sent.
Read Digital Inputs
IRead 8 bits
Ixx Read bit number xx
These commands read the digital input bits from the pod. All byte or word wide responses are sent
most-significant nibble first.
Examples:
Read ALL 8 bits.
SEND: I
RECEIVE: FF[CR]
Read only bit 2
SEND: I02
RECEIVE: 1[CR]
Write Digital Outputs
Oxx W rite to all 8 digital output bits
Ox± Set bit x hi or low
Oxx± Set bit xx hi or low
Ox±xx Pulse bit x hi or low for time xx
Oxx±xx Pulse bit xx hi or low for time xx
bx±xx Identical to Ox±xx
bxx±xx Identical to Oxx±xx
These commands write outputs to digital bits. Any attempt to write to a bit configured as input will fail.
Writing to a byte or word wherein some bits are input and some are output will cause the output
latches to change to the new value, but the bits which are inputs will not output the value until/unless
they are placed in output mode.
Single bit comm ands will return an error (4) if an attempt is made to write to a bit configured as input.
Writing a one to a port asserts the pull-down. Writing a zero de-asserts the pull-down. Therefore,
if the factory installed +5V pull-up is installed, writing a one will cause zero volts to be at the
connector, and writing a zero will cause +5 volts to be asserted. If the factory installed pull-up has
been removed, the user supplied pull-up will be asserted.
Write a zero to bit 2 (set output to +5V or user pull-up)
SEND: O2-
or
SEND: O02-
RECEIVE: [CR]
14 Manual WM-IIRO-8
W rite zeros to every odd bit
SEND: OAA
RECEIVE: [CR]
Read Change-of-state
YRead COS bit.
The pod can set a change-of-state flag for any input that has been configured to do so. This
command will read then reset that bit. Therefore, this comm and will always return "N[CR]" unless the
T command has first been used to enable change-of-state detect for any given bit.
If a change-of-state has been detected since the last "Y" command (see note), the pod will return
"Y[CR]" otherwise "N[CR]" will be returned.
Examples:
Read COS bit
SEND: Y
RECEIVE: N[CR]
Note: The address com mand for any given pod will also return "Y" or "N" and clear the
Change-of-state flag in the pod.
Enable Change-of-State Detection
Txx Set COS mask
These commands configure the bit-by-bit mask to enable change-of-state to set the COS flag on the
pod for readback by the "Y" or address commands. If a one is set for a particular bit, that bit will set
the COS flag if/when the bit changes state. A zero will disable change-of-state detection.
Note: The COS Flag is read via either the "Y" com mand or a valid address command. The COS
Flag is reset to FALSE by either command.
Selecting Which Edge Will Increment Counter
dx± Set Digital input active state on bit x
dxx± Set Digital input active state on bit xx
These commands allow you to set whether a rising or falling edge will increment the digital input
counter; i.e., if all bits are set to rising edge, the digital input counter for any given bit will increment
each time a rising edge is detected. "+" is rising edge, "-" is falling edge.
Examples:
Set bit 1 to rising edge active
SEND: D1+
or
SEND: D01+
RECEIVE: [CR]
Note: The digital input counters are read with the "cxx" command, and reset with the "rxx"
command.
15 Manual WM-IIRO-8
Read Digital Input Counter
cxx Read digital input counter xx
Tthis command will read how many times bit xx has changed to its active state (as configured with
dx± or dxx±) since the last reset command (rxx).
Input counters are configured as 16-bit counters. Counter content is provided most significant bit first.
Output return values are divided into two eight-bit counters. The first byte of the output counters is
the time-remaining before the output pulse expires, the second byte is the originally-programm ed
period of free-run outputs. The second byte is zero for pulse outputs.
Examples:
Read digital input counter for bit #1
SEND: C01
RECEIVE: 0213[CR];assuming 213hex edges since last reset
Reset Counter
rxx Reset digital input counter xx
This command is normally used to reset a digital input counter to zero.
Examples:
Reset digital input counter for digital input number 3
SEND: r03
RECEIVE: [CR]
Read Firmware Revision Number
VRead the firmware revision number
This command is used to read the version of firmware installed in the pod. It returns "X.XX[CR]".
Example:
Read the WM-IIRO-8 version number
SEND: V
RECEIVE: 1.00[CR]
Note: The "H" command returns the version number along with other information.
Resend Last Response
nResend last response
This command will cause the pod to return the sam e thing it just sent. This com mand works for all
responses less than 255 character in length. Norm ally this com m and is used if the host detected a
parity or other line fault while receiving data, and needs the data to be sent a second time.
The "n" command may be repeated.
16 Manual WM-IIRO-8
Example:
Assuming that the last comm and was "I", ask pod to resend last response
SEND: n
RECEIVE: FF[CR];or whatever the data was
Note: This command may not be used for the FASTDATA command, as they exceed the 255
character limit. Use the "D" comm and to perform the same task for these three commands.
Hello Message
H* Hello message
Any string of characters starting with "H " will be interpreted as this command. ("H[CR]" along is also
acceptable.) The return from this command takes the form (without the quotes):
"=Pod aa, W M-IIRO-8 Rev 1.01 Firmware Ver:x.xx ACCES I/O Products, Inc."
aa is the pod address
rr is the hardware revision, such as "B2"
x.xx is the software revision, such as "1.01"
Example:
Read the greeting message
SEND: Hello?
RECEIVE: =Pod 00, WM-IIRO-8 Rev B2 Firmware Ver:1.01 ACCES I/O Products,
Inc.[cr]
Programming Pod Address
A=xx Program the currently selected pod to respond at address xx
This com mand changes the pod's address to xx. If the new address is 00, the pod will be placed into
non-addressed mode. If the new address is not 00, the pod will not respond to further
communications until a valid address command is issued. Hex numbers 00-FF are considered valid
addresses. The RS485 specification allows only 32 drops on the line, so many addresses will be
unused.
The new pod address is saved in EEPROM and will be used even after power-down until the next
"A=xx" command is issued. Note that, it the new address is not 00 (i.e., the pod is configured to be
in addressed mode), it is necessary to issue an address command to the pod at the new address
before it will respond.
The pod returns a message containing the pod number as confirmation.
Example:
Set the pod address to 01
SEND: A=01
RECEIVE: =:Pod#01[CR]
Set the pod address to F3
SEND: A=F3
RECEIVE: =:Pod#F3[CR]
Take the pod out of addressed mode
SEND: A=00
RECEIVE: =:Pod#00[CR]
17 Manual WM-IIRO-8
Read and Store Digital Input Data
FASTDATA Read digital bits 0-7 as fast as possible
These commands read the respective byte of digital input data and store it in SRAM at the fastest
possible rate: 21 microseconds between samples. The commands will store as much data as the pod
can hold: RAM size-1KByte. Typically, this is 7Kbytes of data, however, a 32k RAM version is
optionally available, which would provide 31Kbytes of data storage.
Once the data has been stored, it is dumped to the serial port. The data is formatted into 3-byte
chunks, followed by a space: xxxxxx xxx...etc. There are no carriage returns until the last byte has
been sent.
All normal pod activities (parsing commands, receiving commands, pulse output countdowns,free-run
generation, CO S detect, etc.) STOP until the serial data is done transmitting. NOTHING else works
until the data has been dumped.
Re-send Data
DThis will dum p the last stored historical data to the serial port.
Data can be resent by issuing a "D" command. This will dump the last stored historical data to the
serial port and can be used, for example, if line noise or similar problems are suspected.
This command should only be used after FASTDATA has been issued, because random data fills the
buffer until one of these commands acquire data.
The format of the data is identical to the FASTDATAx commands. See the previous description of
the FASTDATAx comm and for more information about the format and length of returned data.
Example:
Resend the data buffer
SEND: D
RECEIVE: xxxxxx xxxxxx xxxxxx ... xxxxxx for size of buffer.
Entering a New Program
PROGRAM= This command initiates the transfer of a new program to the WM-IIRO-8.
This command should be used carefully. If you accidentally issue a "PROGRAM=" command, ESC
(ASCII 27) will restart the pod as if power had been reset.
This feature is designed to allow ACCES to provide field-upgrades to the W M-IIRO-8 firmware, and,
for advanced users, the opportunity to customize the firmware in the pod. Documentation relating to
the use of this command is provided with the CD, or is available separately for a small fee.
18 Manual WM-IIRO-8
Error Codes
The following error codes can be returned from the pod:
1: Invalid channel number (too large, or not a number. All channel numbers must be between
00 and 17, in hex. (0-24 decimal))
3: Improper Syntax. (Not enough parameters is the usual culprit)
4: Channel number is invalid for this task (For example, if you try to output to a bit that is set
as an input bit, this error code will occur)
9: Parity error. (This occurs when som e part of the received data contains a parity or framing
error)
Additionally, several full-text error codes are returned. All begin with "Error, ", and are useful when
using a terminal to program the pod.
Error, Unrecognized Command: {command received} [CR]
This occurs if the command is not recognized.
Error, Command not fully recognized: {Command received} [CR]
This occurs if the first letter of the command is valid, but the remaining letters are not.
Error, Address command must be CR terminated [CR]
This occurs if the address command (!xx[CR]) has extra characters between the pod number and the
[CR].
19 Manual WM-IIRO-8
Chapter 5: Specification
General
•Connectivity: A serial cable connects the host computer’s COM port
with ACCES’s W M-DP-232 modem, which in turn
communicates with the WM-IIRO-8 via a 900 MHz
wireless connection.
•Intelligence: Type 8051 microcontroller family provides capability of
local control.
•Protection: W atchdog Tim er circuit
•Mem ory: Up to 32k RAM & 32k EEPROM.
•Size of NEMA4 box: 4.53" long by 3.54" wide by 2.17" high
•W eight: 19.0 oz
Power Requirements
•Voltage Range: 7.5 to 15 volts
•Current Range: 130 mA - idle mode
30 mA - increase per relay activation
100 mA - increase during constant transmission
470 mA - maximum
Idle mode may be reduced to 70 mA with cyclic sleep mode
900 MHz Radio
•Frequency Range: 902 to 928 MHz, Unlicensed ISM Band
•Type: Frequency Hopping Spread Spectrum Transceiver
•Throughput: 9600 baud
•Transmit Power: 100mW
•Receiver Sensitivity: -110dBm
•Outdoor Range: 7 miles ( theoretical with line of sight )
•Interference Rejection: 70dB at pager and cellular phone frequencies
900 MHz Antenna
•Frequency Range: 902 to 928 MHz
•Impedance: 50 Snominal
•Gain: 2.1 dBi
•Length: 7"
•Polarization: Vertical
•Wave: Half W ave
•Connector: SMA reverse polarity plug (RPSMA)
20 Manual WM-IIRO-8
Isolated Inputs
•Number: Eight
•Type: Non-polarized, optically isolated from each other and
from the computer. (CMOS compatible)
•Logic Input Low: -0.5 V to 0.8 V
•Logic Input High: +3.0 V to +33.0 V
•Isolation: 60V channel-to-ground or channel-to-channel
•Input Resistance: 1.8K ohms in series with two diodes and an LED.
•Change of State Detection: Change-of-state flags can be set on either the rising or
falling edge of any enabled input bit and can be read via
the serial port.
Relay Outputs
•Number: Eight.
•Contact Form: SPDT ( form C )
•Contact Type: Single Crossbar
•Contact Material: Silver + Gold-clad
•Rated Load: 0.5 A at 125 VAC; 1 A at 24 VDC
•Max. Switching Current: 1 A
•Max. Switching Voltage: 125 VAC; 60 VDC
•Max. Switching Capacity: 62.5 VA; 30 W
•Contact Resistance: 100 mSmax.
•Operate Time: 5 ms
•Release Time: 5 ms
•Contact Life (mechanical): 5 million operations
Environmental
•Operating Temperature Range: 0 °C. to 65 °C.
•Temperature De-rating: Based on the power applied, maximum operating
temperature may have to be de-rated because internal
power regulators dissipate some heat.
For example, when 7.5VDC is applied, the temperature rise inside the enclosure is 7.3 °C. above the
ambient temperature.
Maximum operating temperature can be determined according to the following equation:
VI(TJ = 100) < 19.6 - TA/6.83
Where TAis the ambient temperature in °C. and VI(TJ = 100) is the voltage at which the integral voltage
regulator junction temperature will rise to a temperature of 100 °C.
(Note: The junction temperature is rated to 120 °C. maximum.)
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