Control Microsystems SCADAPack LP User manual

SCADAPack LP
Hardware Manual
CONTROL
MICROSYSTEMS
SCADA products... for the distance
48 Steacie Drive Telephone: [phone]
Kanata, Ontario Facsimile: 613-591-1022
K2K 2A9 Technical Support: 888-226-6876
Canada 888-2CONTROL

SCADAPack LP Hardware Manual
©2000 - 2006 Control Microsystems Inc.
All rights reserved.
Printed in Canada.
Trademarks
TeleSAFE, TelePACE, SmartWIRE, SCADAPack, TeleSAFE Micro16 and
TeleBUS are registered trademarks of Control Microsystems Inc.
All other product names are copyright and registered trademarks or trade names
of their respective owners.
Material used in the User and Reference manual section titled SCADAServer
OLE Automation Reference is distributed under license from the OPC
Foundation.
SCADAPack LP Hardware Manual
May 26, 2006
1

Table of Contents
1OVERVIEW.................................................................................................... 5
2IMPORTANT SAFETY INFORMATION ........................................................ 6
3INSTALLATION............................................................................................. 8
3.1 Field Wiring .................................................................................................... 8
4POWER SUPPLY........................................................................................ 10
4.1 System Grounding ....................................................................................... 10
4.2 Power Management Features...................................................................... 10
4.2.1 COM3 Serial Port Power Control ............................................................ 11
4.2.2 VLOOP Power Control............................................................................ 11
4.2.3 12V to 24V DC/DC Converter Control .................................................... 12
5ANALOG INPUTS ....................................................................................... 13
5.1 Internal Analog Inputs .................................................................................. 13
5.2 I/O Analog Inputs ......................................................................................... 13
5.2.1 Analog Input Connections....................................................................... 14
5.2.2 Analog Input Wiring ................................................................................ 14
5.2.3 Analog Input Wiring Examples................................................................ 14
5.3 Analog Input Range Jumpers....................................................................... 15
5.4 Analog Inputs Data Format .......................................................................... 15
6ANALOG OUTPUTS ................................................................................... 17
6.1 Current Outputs............................................................................................ 17
6.2 Voltage Outputs ........................................................................................... 17
6.3 Analog Outputs Data Format ....................................................................... 17
7DIGITAL OUTPUTS..................................................................................... 19
8DIGITAL INPUTS......................................................................................... 20
8.1 Digital I/O Connection Examples.................................................................. 21
SCADAPack LP Hardware Manual
May 26, 2006
2

9COUNTER INPUTS ..................................................................................... 22
9.1 Counter Input 0 ............................................................................................ 22
9.2 Turbine Meter Counter Inputs 1 and 2 ......................................................... 22
10 SERIAL COMMUNICATION........................................................................ 24
10.1 RS-232 Serial Communications Ports.......................................................... 24
10.1.1 COM2 RS-232 Serial Port....................................................................... 24
10.1.2 COM3 RS-232 Serial Port....................................................................... 26
10.2 RS-232 Wiring Examples ............................................................................. 27
10.2.1 DTE to DTE without Handshaking .......................................................... 27
10.2.2 DTE to DTE with Handshaking ............................................................... 28
10.2.3 DTE to DCE with Handshaking............................................................... 28
10.3 RS-232 Cables............................................................................................. 29
10.3.1 RJ-45 to DE-9S DTE .............................................................................. 29
10.3.2 RJ-45 to SCADAPack Vision .................................................................. 29
10.3.3 RJ-45 to DE-9P DCE .............................................................................. 30
10.4 COM1 RS-485 Serial Communication Port .................................................. 30
10.4.1 RS-485 Bias Resistors............................................................................ 31
10.4.2 RS-485 Termination Resistors................................................................ 31
10.5 RS-485 Wiring Examples ............................................................................. 31
11 OPERATION................................................................................................ 33
11.1 Operating Modes.......................................................................................... 33
11.1.1 Run Mode ............................................................................................... 33
11.1.2 Service Mode.......................................................................................... 33
11.1.3 Cold Boot Mode ...................................................................................... 33
11.1.4 Sleep Mode............................................................................................. 34
11.2 LED Indicators.............................................................................................. 34
11.3 LED Power Control ...................................................................................... 35
11.4 Jumpers ....................................................................................................... 35
11.5 Status LED................................................................................................... 36
11.5.1 I/O Module Error Indication..................................................................... 36
11.5.2 Register Assignment Checksum Error.................................................... 36
12 MAINTENANCE........................................................................................... 37
12.1 Fuses ........................................................................................................... 37
SCADAPack LP Hardware Manual
May 26, 2006
3

12.2 Lithium Battery ............................................................................................. 37
12.2.1 Battery Replacement Procedure............................................................. 37
13 TROUBLESHOOTING................................................................................. 39
13.1 Analog Inputs ............................................................................................... 39
13.2 Analog Outputs ............................................................................................ 39
13.3 Digital Inputs ................................................................................................ 39
13.4 Digital Outputs.............................................................................................. 39
13.5 Counter Inputs.............................................................................................. 40
14 SPECIFICATIONS....................................................................................... 41
14.1 General ........................................................................................................ 41
14.2 Controller ..................................................................................................... 41
14.3 Communications .......................................................................................... 41
14.4 Visual Indicators........................................................................................... 42
14.5 Power Supply ............................................................................................... 42
14.6 I/O Capacity ................................................................................................. 43
14.7 Analog Inputs ............................................................................................... 43
14.8 Analog Outputs ............................................................................................ 44
14.9 Counter Inputs.............................................................................................. 44
14.10 Digital Inputs/Outputs................................................................................... 45
15 APPROVALS AND CERTIFICATIONS....................................................... 46
Index of Figures
Figure 1: SCADAPack LP Controller ................................................................................... 7
Figure 2: SCADAPack LP Board Layout............................................................................. 9
Figure 3: Power Management........................................................................................... 11
Figure 4: Analog Input Wiring ........................................................................................... 15
Figure 5: Analog Output Wiring.......................................................................................... 17
Figure 6: Digital Input/Output Wiring.................................................................................. 21
Figure 7: Counter Input Wiring........................................................................................... 22
Figure 8: Counter Jumpers ................................................................................................ 23
Figure 9: RS-485 Wiring .................................................................................................... 32
SCADAPack LP Hardware Manual
May 26, 2006
4

1 Overview
The SCADAPack LP is a low power controller complete with an integrated power supply, analog
and digital I/O, serial communications and turbine flow meter counter inputs. See
Figure 1: SCADAPack LP Controller. Application programs can be written in Relay Ladder Logic,
IEC 61131-3 and the C language.
Several power saving features are included in the SCADAPack LP. These power saving features
include Sleep Mode, 24V-power shutdown, communication port power control and SCADAPack
Vision power down.
The SCADAPack LP has six analog input channels. Five analog inputs are user configurable for
either 10V or 20mA operation and one is a 32V analog input. Two optional 20mA analog outputs are
available.
Eight digital I/O points, each capable of sinking 1A or monitoring a dry contact closure, provide
flexible digital input and output configurations.
Three counter inputs, two of which are designed for direct connection to the millivolt output of
turbine meter transducers, provide for a variety of connections to metering elements.
The I/O capacity of the SCADAPack LP can be expanded using 5000 Series I/O modules. A
maximum of forty 5000 Series I/O modules may be used for a total expansion capacity of 512 digital
inputs, 512 digital outputs, 128 analog inputs, 64 analog outputs and 64 counter inputs.
Three serial communication ports are provided. An RS-485 port is designed for use with
multivariable transmitters. One of the two RS-232 ports is designed for use with the SCADAPack
Vision operator interface. The SCADAPack LP supports direct wired, telephone and radio
communication.
The primary microcontroller memory is 512KBytes flash ROM, and 1MBytes RAM. The CMOS
RAM is non-volatile (battery backed). An EEPROM (1kBytes) stores configuration parameters. A
real time clock calendar provides for time of day operations and alarms. A hardware watchdog timer
protects against application program failures.
SCADAPack LP Hardware Manual
May 26, 2006
5

2 Important Safety Information
Power, input and output (i/o) wiring must be in accordance with Class I, Division 2 wiring methods
Article 501-4 (b) of the National Electrical Code, NFPA 70 for installations in the U.S., or as
specified in Section 18-1J2 of the Canadian Electrical Code for installations within Canada and in
accordance with the authority having jurisdiction.
WARNING !
EXPLOSION HAZARD - SUBSTITUTION OF COMPONENTS MAY
IMPAIR SUITABILITY FOR CLASS 1, DIVISION 2.
WARNING !
EXPLOSION HAZARD – WHEN IN HAZARDOUS LOCATIONS, TURN
OFF POWER BEFORE REPLACING OR WIRING MODULES.
WARNING !
EXPLOSION HAZARD - DO NOT DISCONNECT EQUIPMENT
UNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA IS
KNOWN TO BE NONHAZARDOUS.
SCADAPack LP Hardware Manual
May 26, 2006
6

Figure 1: SCADAPack LP Controller
SCADAPack LP Hardware Manual
May 26, 2006
7

3 Installation
The installation of SCADAPack controllers requires mounting the controller on the 7.5mm by 35mm
DIN rail and connecting the SCADAPack controller to the system I/O Bus. Refer to the System
Configuration Guide, at the beginning of this manual, for complete information on system layout,
I/O Bus cable routing and SCADAPack controller installation.
3.1 Field Wiring
SCADAPack controllers use screw termination style connectors for termination of field wiring.
These connectors accommodate solid or stranded wires from 12 to 22 AWG. The connectors are
removable allowing replacement of the SCADAPack Controller without disturbing the field wiring.
Leave enough slack in the field wiring for the connector to be removed.
CAUTION: Remove power before servicing unit.
To remove the termination connector:
• Pull the connector upward from the board. Apply even pressure to both ends of the connector.
• To install the termination connector:
• Line up the pins on the module with the holes in the connector. Make sure all the pins line up
properly.
• Push the connector onto the pins. Apply even pressure to both ends on the connector.
There are six connectors for field wiring. Refer to Figure 2: SCADAPack LP Board Layout for
connector locations.
• The two RS-232 communication ports, COM 2 and COM 3, connect to 8 pin modular jacks.
Refer to section 10.1-RS-232 Serial Communications Ports for pinout details and wiring
diagrams for these modular jacks.
• All other field wiring terminates in removable terminal connectors. Connector pinouts and
wiring examples are described in each of the respective sections of this manual.
Optional Analog
Out
p
ut Module
SCADAPack LP Hardware Manual
May 26, 2006
8

Figure 2: SCADAPack LP Board Layout
SCADAPack LP Hardware Manual
May 26, 2006
9

4 Power Supply
The SCADAPack LP is powered from an 11VDC to 24VDC input power source.
• Input power is applied to the 11-24Vdc positive (+) and negative (-) terminals on connector P3.
Refer to section 14-Specifications of this manual for the minimum and maximum operating voltages
and input power requirements.
• When the input voltage is below the minimum recommended voltage the SCADAPack LP will
turn off.
• Exceeding the maximum input voltage or applying a reverse voltage will blow the input power
fuse.
Note: Unlike the other members of the SCADAPack family, the SCADAPack LP connects only to
DC power sources. Connections to power sources such as 16Vac transformers will blow the
fuse and may cause damage to the SCADAPack LP.
The DC power-input voltage is used to generate 5V for the SCADAPack LP circuitry. The output
capacity of the 5V supply is sufficient to power the SCADAPack LP and a SCADAPack Vision
operator interface with 100mA remaining capacity for a limited number of 5000 Series I/O modules.
For 12VDC power-input voltages a 12V to 24V DC/DC converter is used to power 20mA analog
input and output devices. The DC/DC converter is controlled by the user application program and
may turned on or off. Refer to section 4.2.3-12V to 24V DC/DC Converter Control for more
information on DC/DC converter control.
4.1 System Grounding
In most applications, it is desirable to ground the system by connecting the system power supply
common, to the chassis or panel ground. The negative (–ve) side of the DC power input terminal as
well as all I/O point terminals labeled GND are connected to chassis ground.
4.2 Power Management Features
The SCADAPack LP provides a number of special features to reduce power consumption. These
power management features are:
• COM3 serial port power control.
• VLoop power control.
• 12V to 24V DC/DC Converter Control.
The SCADAPack LP provides three internal digital outputs that can be operated by the user
application to manage the power saving features. Internal digital outputs 9, 10 and 11 and the power
management functions they control are described in the following sections.
Refer to Figure 3: Power Management for an overview of the power management features. Refer
to the appropriate software manual for information on using and controlling the internal Digital
Outputs. For TelePACE applications refer to the Register Assignment for SCADAPack LP I/O
module and for ISaGRAF applications refer to the I/O Complex Equipment for SCADAPack LP I/O.
SCADAPack LP Hardware Manual
May 26, 2006
10

12V to 24V boost
ON/OFF
Dout 11
P10 - Vloop
P2
I/O Expansion
5V supply
P3 – Power In
Dout 10
Sleep = open
P5 – COM1
RS-485
P7 – COM2
RS-232
P8 – COM3
RS-232
Dout 9
J13
5305 Analog
Output Module
Figure 3: Power Management
4.2.1 COM3 Serial Port Power Control
The COM3 serial port is intended for use with the SCADAPack Vision or other Human Machine
Interface (HMI). Pin 1 of the RJ-45 connector provides switched 5-volt power for the SCADAPack
Vision or other HMI.
Refer to section 10.1.2-COM3 RS-232 Serial Port section for information on COM3 and section
10.3.2-RJ-45 to SCADAPack Vision section for wiring examples. HMI power is controlled in the
following ways.
• When internal Digital Output 9 is ON HMI power is turned on.
• When internal Digital Output 9 is OFF HMI power is turned off.
• HMI power is turned on for five minutes when a momentary contact is made between pin 2
(DCD) and pin 3 (DTR) on the COM3 RJ-45 connector. This permits the SCADAPack Vision or
an HMI pushbutton to control HMI power. At each momentary contact, the five-minute power
timer is reloaded. If the five-minute power timer is maintaining the HMI power on, a sustained
two-second or longer contact between DCD and DTR will turn off HMI power. Refer to section
10.3.2-RJ-45 to SCADAPack Vision for more information.
Internal Digital Input 9 indicates the status of COM3 serial port power. Digital Input 9 is set when
COM3 serial port power is on and is cleared when COM1 serial port power is off.
HMI power is turned on whenever the LED power is enabled. This feature is provided for service
and diagnostics. Refer to section 11.3-LED Power Control for further information on this feature.
4.2.2 VLOOP Power Control
The DC/DC converter output can be used to power analog input current loops or other
instrumentation. This output, VLOOP, is controlled for intermittent or continuous operation. Turning
the VLOOP output off when it is not required can save considerable electrical power.
SCADAPack LP Hardware Manual
May 26, 2006
11

The switched VLOOP power source is the output of the DC-DC 12/24V converter if it is turned on.
See the section 4.2.3-12V to 24V DC/DC Converter Control for converter information. The VLOOP
power source is the applied input power if the DC-DC converter is turned off.
• Turn on Digital Output 10 to turn ON the VLOOP output.
• Turn off Digital Output 10 to turn OFF the VLOOP output.
Internal Digital Input 10 indicates the status of VLOOP power. Digital Input 10 is set when VLOOP
power is on and is cleared when VLOOP power is off.
Note: When VLOOP is first turned on, the user application program must wait some period of time
for input readings to stabilize. This time period is dependent on the field sensors and
transmitters connected. Documentation for these devices should be consulted.
The VLOOP output is turned on when the LED power is enabled. This feature is provided for service
and diagnostics. Refer to section 11.3-LED Power Control for further information on this feature.
4.2.2.1 VLOOP Over-Current Protection
When VLOOP output is turned on, it is monitored for excessive current consumption caused by field
wiring or instrumentation problems. If sustained over-current is detected (100 ms), VLOOP is turned
off even though internal Digital Outputs 10 is turned on. This protection prevents unnecessary fuse
blowing, circuitry damage and rapid battery depletion.
When VLOOP output is turned on, using internal Digital Output 10, and a short circuit is detected
VLOOP will turn off. VLOOP will turn on to try again 5 seconds after turning off. If the fault
condition still exits VLOOP will again turn off and retry after a 5 second delay. While the fault
condition exists internal Digital Input 12 will be ON.
4.2.3 12V to 24V DC/DC Converter Control
The 12V to 24V DC/DC converter is used to provide 24 Vdc for VLOOP power and for the 5305
Analog Output module. The converter should be turned on if the SCADAPack LP is equipped with
analog outputs for which 24V drive capability is required. Otherwise, the DC/DC converter can be
turned off to conserve power.
• Turn on Digital Output 11 to turn ON the 12V to 24V DC/DC converter. When the converter is
turned on 24Vdc is provided to the VLOOP power and to the 5305 Analog Output module.
• Turn off Digital Output 11 to turn OFF the 12V to 24V DC/DC converter. When the converter
is turned off VLOOP power and the 5305 Analog Output module use is the applied input power.
Internal Digital Input 11 indicates the status of the 12V to 24V DC/DC converter. Digital Input 11
is set when the 12V to 24V DC/DC converter is on and is cleared when the 12V to 24V DC/DC
converter is off.
The 12V to 24V DC/DC converter is turned on when the LED power is enabled. This feature is
provided for service and diagnostics. Refer to section 11.3-LED Power Control for further
information on this feature
SCADAPack LP Hardware Manual
May 26, 2006
12

5 Analog Inputs
There are six single ended analog inputs available to the user. These inputs provide 15-bit resolution
over the range of the input. Five of these inputs are selectable for voltage or current inputs. One of
these inputs is a 0 to 32.768-volt input and can be used to monitor battery voltage.
In addition to these analog inputs there are internal analog inputs available to the user. These analog
inputs are used in application programs to monitor, RAM battery voltage, controller board ambient
temperature and DC\DC converter voltage used for VLOOP.
Input Type Description
0 to 4 external Jumper selectable for 0-10V or 0-40mA inputs.
5 external 0-32.768V for battery monitoring
6 internal DC/DC converter output voltage
7 internal Used internally by SCADAPack LP.
Refer to the appropriate software manual for information on using the SCADAPack LP Analog
Inputs in application programs. For TelePACE applications refer to the Register Assignment for
SCADAPack LP I/O module and for ISaGRAF applications refer to the I/O Complex Equipment for
SCADAPack LP I/O.
5.1 Internal Analog Inputs
SCADAPack LP Controllers have two internal analog inputs. These internal analog inputs are
accessed from the user application program.
The ambient temperature input measures the temperature at the controller circuit board. It is useful
for measuring the operating environment of the controller and returns an integer value in the range –
40 to 75 deg C or –40 to 167 deg F. The temperature reading represents temperatures in the range -
40°C to 75°C or -40°F to 167°F. Temperatures outside this range cannot be measured.
• For TelePACE applications use the AIN Controller Temperature register assignment to read the
ambient temperature in degrees C and degrees F.
• For ISaGRAF applications use the aintemp I/O connection to read the ambient temperature in
degrees C and degrees F.
The lithium battery input measures the voltage of the battery that maintains the non-volatile RAM in
the controller. The reading returned from this input is in the range from 0 – 5000 representing the
battery voltage in mV. It is useful in determining if the battery needs replacement. The 3.6V lithium
battery will return a typical value of 3600 or 3700. A reading less than 3000 (3.0V) indicates that the
lithium battery requires replacement.
• For TelePACE applications use the AIN Controller RAM Battery V register assignment to read
the lithium battery voltage.
• For ISaGRAF applications use the ainbatt I/O connection to read the lithium battery voltage.
5.2 I/O Analog Inputs
There are six single ended analog inputs available to the user. These analog inputs provide 15-bit
resolution over the entire range of the input. The analog inputs are transient protected and share a
common return (GND) that is connected to the chassis. Refer to Figure 2: SCADAPack LP Board
Layout for the location of P9.
SCADAPack LP Hardware Manual
May 26, 2006
13

5.2.1 Analog Input Connections
The six external analog inputs connect to connector P10. The analog inputs are identified as Channel
0 through Channel 5. The first five, identified as Channels 0 through 4, use range jumpers to select
either voltage inputs or current inputs. These analog inputs are single ended and measure voltages up
to 10V. When configured as current inputs, the 250Ωcurrent sense resistor will produce at 5V input
at 20mA. See section 5.3-Analog Input Range Jumpers for information on setting the range. See
Figure 2: SCADAPack LP Board Layout section for the location of the range jumpers.
The sixth input, identified as Channel 5, is a 32.768V voltage input. This input is typically used to
monitor the input power or battery voltage.
5.2.2 Analog Input Wiring
The analog inputs support loop powered and self powered transmitters. Loop powered transmitters
are two terminal devices that connect between a power supply and the analog input. The loop current
continues from the power supply, through the transmitter and to ground through a 250Ωresistor built
into the 20mA input circuit. Self-powered transmitters have three terminals called power in, signal
out and common. Self-powered transmitters can have a current or voltage output. The signal out
connects to the Analog Input Channel, the common connects to GND and the power in connects to a
power supply.
There are three options for the user when selecting the power source. In all cases it is important for
the user to ensure that the transmitter has enough voltage for proper operation. The transmitter
manufacturer supplies the minimum operating voltage specification of the transmitter. The analog
input requires a minimum of 5V.
The first option is to use the SCADAPack LP VLOOP Supply that steps up the input voltage to 24V.
The stepped up voltage is available on the Analog Connector P10 and is labeled VLOOP. There is
sufficient power available here for the five analog inputs and two analog outputs all operating at
20mA. Significant power saving is possible by switching the Loop Supply off.
The second option is similar to the first except that the power supply is not stepped up to 24V. This
can be used with low voltage transmitters or when then the input voltage is sufficiently high that
further stepping up is not necessary. It is still possible to switch the supply off under program
control. When the step up is turned off, VLOOP is approximately 0.5V less that the power input
voltage.
The third option is to power the transmitter from a power supply supplied by the user.
5.2.3 Analog Input Wiring Examples
Figure 4: Analog Input Wiring shows example wiring of several transmitters.
• Channel 0 has a loop powered current transmitter connected to VLOOP.
• Channel 1 has a loop powered current transmitter connected to an external 24V power supply.
• Channel 2 is unused.
• Channel 3 has a self-powered voltage transmitter connected to an external 24V-power supply.
• Channel 4 has a self-powered current transmitter connected to an external 24V-power supply.
• Channel 5 is used to monitor the external 24V-power supply.
SCADAPack LP Hardware Manual
May 26, 2006
14

+
External 24Vdc
Power Supply
_
Voltage
8
+
_
Vloop
7 6 5 4 3 2 1
GND012345
12304
Current
P10 - Analog Inputs
+
_
PWR
Voltage O/P
COM
PWR
Current O/P
COM
J1 J2 J3 J4 J5
Figure 4: Analog Input Wiring
5.3 Analog Input Range Jumpers
Channels 0 through 4 can be user configured for either voltage or current operation with jumper
links. Refer to Figure 4: Analog Input Wiring for examples of the how a jumper link is installed on
J1 through J5. A jumper link installed in the Current position of the header results in a 250Ωresistor
across the appropriate analog input. A jumper link installed in the Voltage position of the header
results in high impedance analog input.
5.4 Analog Inputs Data Format
The I/O analog inputs have a 16-bit, unipolar, analog to digital (A/D) converter that measures input
voltages from 0 to 10V. The analog inputs are factory calibrated to scale the data and represent it
with a 15 bit unsigned number.
When an analog input is configured for voltage, 10V input is represented with 15 bits of data. The
input resolution is 0.305mV/count.
When an analog input is configured for current, 20mA input is represented with 14 bits of data.
There is 100% over range. The input resolution is 1.22µA/count.
The channel 5 analog input is configured for voltage. 32.768V is represented with 15 bits of data.
The input resolution is 0.001V/count.
SCADAPack LP Hardware Manual
May 26, 2006
15

The following table shows the A/D output value for several input signals.
Current
Channel 0-4
Voltage
Channel 0-4
Voltage
Channel 5
A/D Output
0mA 0V 0V 0
1.22µA 0.305mV 0.001V 1
4mA 1.0V 3.277V 3277
10mA 2.5V 8.192V 8192
20mA 5.0V 16.384V 16384
39.999mA 9.9997V 32.767V 32767
SCADAPack LP Hardware Manual
May 26, 2006
16

6 Analog Outputs
The SCADAPack LP may include two channels of analog output if this option was requested at time
of purchase.
Refer to the appropriate software manual for information on using the SCADAPack LP Analog
Outputs in application programs. For TelePACE applications refer to the Register Assignment for
SCADAPack LP I/O module and for ISaGRAF applications refer to the I/O Complex Equipment for
SCADAPack LP I/O.
6.1 Current Outputs
The optional analog output module provides two 20mA analog outputs.
The internal power supply powers the analog output circuits. The user can, under program control,
boost the DC Input Power to 24V. This is required when generating current outputs into high
resistance loads. Refer to section 4.2.3-12V to 24V DC/DC Converter Control for further
information.
Figure 5: Analog Output Wiring shows example wiring of the analog outputs.
6.2 Voltage Outputs
To obtain voltage outputs, connect a load resistor in the current output. Connect the voltage device
across the load resistor. The table below list resistance values and output range settings for two
common voltage ranges. The resistance value listed is the parallel resistance of the device and the
load resistor.
Voltage Range Resistance Output Range
0 to 5V 250Ω0-20mA
0 to 10V 500Ω0-20mA
32 1
GND 0 1
P10 - Analog Outputs
–
L
O
A
D
+
–
L
O
A
D
+
Figure 5: Analog Output Wiring
6.3 Analog Outputs Data Format
The optional analog output module has a 12-bit, unipolar, digital to analog converter. There are 4096
counts in the output signal range. The 0-20mA output range resolution is 4.88µA/count. The table
below shows the output current for several D/A values.
SCADAPack LP Hardware Manual
May 26, 2006
17

D/A Value Current
0 0mA
8 4.88µA
6552 4mA
16384 10mA
24576 15mA
32760 19.995mA
SCADAPack LP Hardware Manual
May 26, 2006
18

7 Digital Outputs
The SCADAPack LP I/O Module provides eight universal digital inputs or outputs. Outputs are
open-collector/open drain type for use with sustained DC loads up to 1 ampere. Higher peak loads
can be tolerated.
The negative side of the load is connected to the desired terminal on the controller terminal block P3.
The positive side of the load connects to a power supply. When the load is on the load current is
switched through the controller to terminal labeled GND. GND must be connected to the negative
side of the power supply.
Inductive load transient suppression is built into each digital output point. It is not necessary to add
additional inductive load transient suppression unless highly inductive loads (greater than 1H) are
operated continuously at greater than 0.5Hz.
The SCADAPack LP also provides three internal digital outputs that can be controlled by the user
application to manage power saving features unique to the SCADAPack LP.
Refer to the appropriate software manual for information on using the SCADAPack LP Digital
Inputs and Outputs in application programs. For TelePACE applications refer to the Register
Assignment for SCADAPack LP I/O module and for ISaGRAF applications refer to the I/O Complex
Equipment for SCADAPack LP I/O.
The following table describes the SCADAPack LP digital outputs.
Output Type Description
0 to 7 external Open drain outputs. These outputs are located on terminal
P3.
0 = output transistor off
1 = output transistor on
8 internal Not used for applications, internal use only.
9 internal com3 (HMI) power control
0 = off
1 = on
See section 4.2.1-COM3 Serial Port Power Control for
details.
10 internal VLOOP power control
0 = off
1 = on
See section 4.2.2- VLOOP Power Control for details.
11 internal DC/DC converter control
0 = off
1 = on
See section 4.2.3-12V to 24V DC/DC Converter Control for
details.
SCADAPack LP Hardware Manual
May 26, 2006
19