Control Microsystems SCADAPack 350 User manual

SCADAPack 350 Controller Board
Hardware Manual
CONTRO
L
MICROSYSTEMS
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SCADAPack 350 Hardware Manual
©2007 Control Microsystems Inc.
All rights reserved.
Printed in Canada.
Trademarks
TelePACE, SCADASense, SCADAServer, SCADALog, RealFLO, TeleSAFE,
TeleSAFE Micro16, SCADAPack, SCADAPack Light, SCADAPack Plus,
SCADAPack 32, SCADAPack 32P, SCADAPack 350, SCADAPack LP,
SCADAPack 100, SCADASense 4202 DS, SCADASense 4202 DR,
SCADASense 4301 DS, SCADASense 4301 DR, SCADASense 4102,
SCADASense 4012, SCADASense 4032 and TeleBUS are registered
trademarks of Control Microsystems.
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.
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Table of Contents
1OVERVIEW.................................................................................................... 6
2IMPORTANT SAFETY INFORMATION ........................................................ 8
3INSTALLATION............................................................................................. 9
3.1 5606 Input/Output Module.............................................................................. 9
3.2 Field Wiring .................................................................................................... 9
4POWER SUPPLY........................................................................................ 11
4.1 Overview and Power Requirements............................................................. 11
4.2 Sample Power Calculations ......................................................................... 11
4.3 System Grounding ....................................................................................... 12
4.4 Power Management Features...................................................................... 12
4.4.1 COM3 Serial Port Power Control ............................................................ 13
4.4.2 VLOOP Power Control............................................................................ 14
4.4.3 12V to 24V DC/DC Converter Control .................................................... 14
5ANALOG INPUTS ....................................................................................... 16
5.1 Internal Analog Inputs .................................................................................. 16
5.2 I/O Analog Inputs ......................................................................................... 16
5.2.1 Analog Input Wiring ................................................................................ 17
5.2.2 Analog Input Wiring Examples................................................................ 17
5.3 Analog Input Mode Jumpers ........................................................................ 18
5.4 Analog Inputs Data Format .......................................................................... 18
6ANALOG OUTPUTS ................................................................................... 19
6.1 Current Outputs............................................................................................ 19
6.2 Voltage Outputs ........................................................................................... 19
6.3 Analog Outputs Data Format ....................................................................... 19
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7DIGITAL OUTPUTS..................................................................................... 21
8DIGITAL INPUTS......................................................................................... 22
8.1 Digital I/O Connection Examples.................................................................. 24
9COUNTER INPUTS ..................................................................................... 25
9.1 Counter Input 0 ............................................................................................ 25
9.2 Turbine Meter Counter Inputs 1 and 2 ......................................................... 25
9.2.1 Directly Connecting to Low Voltage Turbine Meters ............................... 26
9.2.2 Connecting to Higher Voltage Turbine Meters ........................................ 27
9.2.3 Connecting to Open Collector / Dry Contact Turbine Meters.................. 28
10 SERIAL COMMUNICATION........................................................................ 29
10.1 RS-232 Serial Communications Ports.......................................................... 29
10.1.1 COM2 RS-232 Serial Port....................................................................... 29
10.1.2 COM3 RS-232 Serial Port....................................................................... 32
10.1.3 RS-232 Wiring Examples........................................................................ 35
10.1.4 RS-232 Cables ....................................................................................... 36
10.2 RS-485 Serial Communication Ports............................................................ 37
10.2.1 COM1 RS-485 Serial Port....................................................................... 37
10.2.2 COM2 RS-485 Serial Port....................................................................... 38
10.2.3 RS-485 Bias Resistors............................................................................ 40
10.2.4 RS-485 Termination Resistors................................................................ 40
10.2.5 RS-485 Wiring Examples........................................................................ 41
11 ETHERNET COMMUNICATION.................................................................. 42
11.1 LAN Port Settings......................................................................................... 42
11.1.1 TCP/IP Settings ...................................................................................... 42
11.1.2 Modbus/TCP Settings............................................................................. 42
11.2 RJ-45 Modular Connector for Ethernet ........................................................ 43
12 USB PORTS................................................................................................ 45
12.1 USB Connections......................................................................................... 45
12.1.1 Host Port................................................................................................. 45
12.1.2 Peripheral Port........................................................................................ 45
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13 OPERATION................................................................................................ 46
13.1 Operating Modes.......................................................................................... 46
13.1.1 Run Mode ............................................................................................... 46
13.1.2 Service Mode.......................................................................................... 46
13.1.3 Cold Boot Mode ...................................................................................... 47
13.1.4 Factory Boot Mode ................................................................................. 47
13.1.5 Boot Mode Effects .................................................................................. 48
13.1.6 Sleep Mode............................................................................................. 49
13.1.7 Reduced Power Mode ............................................................................ 49
13.1.8 Power Consumption ............................................................................... 50
13.2 LED Indicators.............................................................................................. 50
13.3 LED Power Control ...................................................................................... 50
13.4 Jumpers ....................................................................................................... 51
13.5 Status LED................................................................................................... 51
13.5.1 I/O Module Error Indication..................................................................... 52
13.5.2 Register Assignment Checksum Error.................................................... 52
14 MAINTENANCE........................................................................................... 53
14.1 Fuses ........................................................................................................... 53
14.2 Lithium Battery ............................................................................................. 53
14.2.1 Battery Replacement Procedure............................................................. 53
15 TROUBLESHOOTING................................................................................. 55
15.1 Analog Inputs ............................................................................................... 55
15.2 Analog Outputs ............................................................................................ 55
15.3 Digital Inputs ................................................................................................ 55
15.4 Digital Outputs.............................................................................................. 56
15.5 Counter Inputs.............................................................................................. 56
16 SPECIFICATIONS....................................................................................... 57
16.1 General ........................................................................................................ 57
16.2 Controller ..................................................................................................... 57
16.3 Communications .......................................................................................... 57
16.4 USB.............................................................................................................. 58
16.5 Visual Indicators........................................................................................... 58
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16.6 Power Supply ............................................................................................... 59
16.7 I/O Capacity ................................................................................................. 59
16.8 Analog Inputs ............................................................................................... 60
16.9 Analog Outputs ............................................................................................ 60
16.10 Counter Inputs.............................................................................................. 61
16.11 Digital Inputs/Outputs................................................................................... 61
17 APPROVALS AND CERTIFICATIONS....................................................... 63
Index of Figures
Figure 1: SCADAPack 350 Controller....................................................................................7
Figure 2: SCADAPack 350 Layout.......................................................................................10
Figure 3: Power Management..............................................................................................13
Figure 4: Analog Input Wiring ..............................................................................................18
Figure 5: Analog Output Wiring............................................................................................19
Figure 6: Digital Input/Output Wiring....................................................................................24
Figure 7: Counter Input Wiring.............................................................................................25
Figure 8: Counter Jumpers ..................................................................................................28
Figure 9: RJ-45 Connector Pinout ......................................................................................30
Figure 10: RJ-45 Connector Pinout ....................................................................................33
Figure 11: RS-232 DTE to RS-232 DTE without Handshaking............................................35
Figure 12: RS-232 DTE to RS-232 DTE with Handshaking.................................................35
Figure 13: RS-232 DTE to RS-232 DCE With Handshaking ...............................................36
Figure 14: COM2 RJ-45 Connector .....................................................................................40
Figure 15: RS-485 Wiring ....................................................................................................41
Figure 16: RJ-45 Connector for Ethernet.............................................................................44
Figure 17: Host USB Port Connections ...............................................................................45
Figure 18: Peripheral USB Port Connections ......................................................................45
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1 Overview
A SCADAPack 350 controller, comprising a 5209 controller board, is a low power RTU, complete
with an integrated power supply, analog and digital I/O, serial communications, 10/100 Mb/s
Ethernet, 12Mb/s USB A and USB B ports and turbine flow meter counter inputs. 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 350. These power saving features
include Sleep Mode, 24V-power shutdown, Ethernet port shutdown, communication port power
control, and SCADAPack Vision power down, USB disable and a reduced power mode that lowers
the CPU clock.
The SCADAPack 350 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 350 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.
This controller board can be combined with a 5606 Integrated I/O module, forming a SCADAPack
357. For information on the 5606 I/O module, refer to the 5606 User Manual.
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 350 supports direct wired, telephone and radio
communication. One of the RS-232 ports can be configured as a 2-wire RS-485 port.
A 10/100 Mb/s Ethernet port is provided. Power to the Ethernet port can be controlled to minimize
power consumption in power-sensitive application.
The USB interface features one USB host and one USB peripheral port, for maximum flexibility.
They can be used simultaneously, allowing connection to either upstream or downstream USB
devices, or both.
The primary microcontroller memory contains 16MB of flash ROM and 4MB of RAM. The CMOS
RAM is non-volatile (battery backed). A 4Kb EEPROM 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.
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Figure 1: SCADAPack 350 Controller
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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.
WARNING !
USB PORTS MAY BE PERMANENTLY USED IN NON-HAZARDOUS
APPLICATIONS. USB PORTS MAY BE USED FOR CORRECTIVE
MAINTENANCE IN LOCATIONS CLASSIFIED AS HAZARDOUS BUT
ARE KNOWN TO BE IN A NON-HAZARDOUS STATE.
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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 5606 Input/Output Module
The SCADAPack 350 may include a optional 5606 lower IO module. The Model 5606 Input Output
Module adds eight analog inputs, 32 digital inputs, and 16 relay digital outputs to the 5000 Series
input/output system. Refer to the 5606 Input Output Module hardware manual for details.
3.2 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 eight connectors for field wiring. Refer to Figure 2: SCADAPack 350 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.
•One Ethernet port connects to an 8 pin modular jack. Refer to section 11-Ethernet
Communication for pinout details.
•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.
•The USB ports use conventional USB-A and USB-B interface connectors. Refer to section 12-
USB Ports for details.
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Figure 2: SCADAPack 350 Board Layout
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4 Power Supply
4.1 Overview and Power Requirements
The SCADAPack 350 is powered from an 11V DC to 30V DC input power source.
•Input power is applied to the positive (+) and negative (-) terminals on connector P3.
Refer to section 16-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 350 will
turn off.
•Exceeding the maximum input voltage or applying a reverse voltage will blow the input power
fuse.
CAUTION: Unlike the other members of the SCADAPack family, the SCADAPack 350 operates
only on a DC power sources. Connections to power sources such as 16Vac
transformers will blow the fuse and may cause damage to the SCADAPack 350.
The DC power-input voltage is used to generate 5V at 1.2A (6W) some of which is used for the
controller onboard circuitry. The output capacity of the 6W is sufficient to power the SCADAPack
350 controller board, a SCADAPack Vision operator interface with a limited number of 5000 Series
I/O modules.
The power available for any 5000 Series expansion I/O modules is limited to 5.5W (5V at 1200mA)
and depends on the controller features enabled. For 12VDC input voltages an onboard DC/DC
converter with an output capacity of 3.36W (24V at 140mA) can be used to power five 20mA analog
inputs and two 20mA output devices (loop-powered transmitters). The 12/24V DC/DC converter is
controlled by the user application program and may turned on or off. Refer to section 4.4.3- 12V to
24V DC/DC Converter Control for more information on DC/DC converter control.
4.2 Sample Power Calculations
Example 1: Assume we have a 5209 controller (SCADAPack 350) board with an integrated 5606
I/O module. In this example it is assumed that the controller is powered from a 12V supply, the
LAN port and 12/24V DC/DC converted features are also enabled. Also assume that all five 20mA
analog input channels and two 20mA analog output channels need to be powered. The controller
will not be running in reduced power mode. The current requirement of the controller board and I/O
module is summarized in the table below.
5V Current 24V Current
5209 Controller Board
(base current in normal mode)
80mA 20mA x 5 = 100mA (Vloop)
LAN Port 160mA 0mA
5606 I/O Module 600mA 12mA
5305 Analog output 0mA 20mA X 2 = 40mA (Vloop)
Total 840mA 140mA (operation)
Available for I/O
expansion, USB and
COM/Visions
360mA
remaining from 1.2A
capacity
0mA
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In this case, 360mA at 5V power is available for any I/O expansion, to enable the USB port and for
COM/Vision power.
In this example, the total input power required from a 12V power supply is calculated as follows:
5V Power: 5V x .84A = 4.2W
24V Power: 24V x .14A = 3.36W
Total Input Power Required = 7.56W/0.85 = 8.90W (assuming 85% power supply efficiency).
Therefore your 12V power supply must be capable of providing 8.90W/12 = 0.74A of current.
Note that the additional analog input channels on the integrated 5606 I/O module will need to be
powered from an external power source.
Example 2: Assume we have a 5209 controller board with two analog outputs but without the
integrated 5606 I/O module. The controller board is powered from a 12V supply, is operating in
reduced power mode and the LAN port is also not enabled. All five 20mA analog input channels on
the controller board and two optional 20mA analog output channels are needed. To power the
analog inputs and outputs using the controller board power supply, the 12/24V DC/DC converter
must be enabled. The current requirements in this scenario is summarized in the table below
5V Current 24V Current
5209 Controller Board
(base current in reduced power mode)
40mA 20mA x 5 = 100mA (Vloop)
5305 Analog output 0mA 20mA X 2 = 40mA (Vloop)
Total 40mA 140mA (operation)
Available for I/O expansion,
LAN, USB and COM/Visions
1160mA
remaining 1.2A
capacity
0mA
In this case, 1160mA is available to power the LAN and USB ports, COM/Vision displays as well as
other expansion modules downstream the SCADAPack 350 controller.
The total input power required from a 12V power supply is calculated as follows:
5V Power: 5V x 0.04A = 0.2W
24V Power: 24V x .14A = 3.56W
Total Input power required = 3.56W/0.85 = 4.19W (assuming 85% power supply efficiency)
4.3 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.
4.4 Power Management Features
The SCADAPack 350 provides a number of special features to reduce power consumption. Refer to
Figure 3: Power Management for an overview of the power management features. These power
management features are:
•COM3 serial port power control for Vision Displays
•VLOOP power control.
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•12V to 24V DC/DC Converter Control.
•LED Power control.
•Ethernet disable.
•USB disable.
•Lowering the CPU clock speed for reduced power mode.
The SCADAPack 350 provides three internal digital outputs that can be operated by the user
application to manage the power saving features. Internal digital outputs 8, 9 and 10 and the power
management functions they control are described in the following sections.
Disabling and enabling of the Ethernet and USB ports as well as a reduction of the clock speed can
be done in TelePACE using the CNFG Power Mode register assignment. The SETPMODE/
GETPMODE functions in ISaGRAF allow a user application to control these power management
features. For C applications, use the SetPowerMode and GetPowerMode functions. Refer to the
appropriate software manual for information on using and controlling the internal Digital Outputs.
12V to 24V boost
ON/OFF
Dout 9
P10 - Vloop
P2
I/O Expansion
3.3/5V supply
P3 – Power In
Dout 8
Sleep = open
P6 – COM1
RS-485
P8 – COM2
RS-232/485
P9 – COM3
RS-232
Dout 10
J13
5305 Analog
Output Module
P4/5
USB
P7
LAN
Figure 3: Power Management
4.4.1 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 a switched 5-volt power for the SCADAPack
Vision or other HMI.
Refer to section 10.1.2-COM3 RS-232 Serial Port for information on COM3 and section 10.1.4.2-
RJ-45 to SCADAPack Vision for wiring examples. HMI power is controlled in the following ways.
•When the LED power is enabled, the HMI power is turned on.
•When the LED power is disabled and internal Digital Output 10 is ON HMI power is turned on.
•When the LED power is disabled and internal Digital Output 10 is OFF HMI power is turned
off.
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•When the LED power is disabled, HMI power is turned on for five minutes when a momentary
contact is made between pin 2 (DCD) and pin 3 (DTR) on the RJ-45 connector of COM3. 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 momentary contact between DCD and DTR will turn off HMI
power. Refer to section 10.1.4.2-RJ-45 to SCADAPack Vision for more information.
Internal Digital Input 12 indicates the status of COM3 serial port power. Digital Input 12 is set
when COM3 serial port power is on and is cleared when COM3 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 13.3-LED Power Control for further information on this feature.
4.4.2 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.
The switched VLOOP power source is the output of the DC-DC 12/24V converter if it is turned on.
See section 4.4.3- 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 8 to turn ON the VLOOP output.
•Turn off Digital Output 8 to turn OFF the VLOOP output.
Internal Digital Input 8 indicates the status of VLOOP power. Digital Input 8 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 13.3-LED Power Control for further information on this feature.
4.4.2.1 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 10 will be ON.
4.4.3 12V to 24V DC/DC Converter Control
The 12V to 24V DC/DC converter is used to provide 24V DC for VLOOP power and for the 5305
Analog Output module. The converter should be turned on if the SCADAPack 350 is equipped with
analog outputs for which 24V drive capability is required. Otherwise, the DC/DC converter can be
turned off to conserve power.
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•Turn on Digital Output 9 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 9 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 9 indicates the status of the 12V to 24V DC/DC converter. Digital Input 9 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 13.3-LED Power Control for further
information on this feature.
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5 Analog Inputs
The SCADAPack 350 provides eight analog input channels. This comprises of six single ended
analog inputs available for external wiring and two internal for monitoring of onboard controller
variables. The external inputs provide 15-bit resolution over the range of the input. Five external
inputs can be configured for voltage or current mode. The sixth external input is configured for
voltage mode only and will measure 0 to 32.768V. This input can be used to monitor the input
power or a battery voltage. Wiring of the external outputs is covered in this section of the manual.
The two internal inputs can be used in a user application to monitor, RAM battery voltage, controller
board ambient temperature and DC\DC converter voltage used for VLOOP. See the following
sections for details on how to access
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 350.
Refer to the TelePACE or ISaGRAF software manuals for information on how to use the
SCADAPack 350 Analog Outputs in application programs. Access to the analog output registers is
achieved using a Register Assignment in TelePACE or I/O connection in ISaGRAF.
5.1 Internal Analog Inputs
Two internal analog inputs which measure the controller board ambient temperature and NV-RAM
battery voltage can be accessed from a 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°C to 75°C or –40°F to 167°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
Six single ended analog inputs are available for measurement of field data. These analog inputs
provide 15-bit resolution over the entire range of the input. The analog inputs identified as Channel 0
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through Channel 5 are transient protected and share a common return (GND) that is connected to the
chassis. Refer to Figure 2: SCADAPack 350 Board Layout for the location of 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 voltage or current mode. When set to voltage
mode, the analog inputs are single ended and measure up to 10V. When configured for current mode
a 250Ωcurrent sense resistor will produce a 5V input at 20mA. See section 5.3-Analog Input Mode
Jumpers for information on setting the range.
The sixth analog input, identified as Channel 5, is configured for voltage mode only and measures up
to 32.768V. This input is typically used to monitor the input supply or battery voltage.
5.2.1 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 typically labeled power
in, signal out and common. Self-powered transmitters can have a current or voltage output. The
signal out terminal 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 350 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.
5.2.2 Analog Input Wiring Examples
Example wiring of several transmitters is illustrated in Figure 4: Analog Input Wiring.
•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.
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+
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 Mode Jumpers
Channels 0 through 4 can be user configured for either voltage or current operation, using jumper
links. Refer to Figure 2: SCADAPack 350 Board Layout for the location of the analog input mode
selection jumpers. A sample illustration of the analog input mode selection using jumpers J1-J5 is
given in Figure 4: Analog Input Wiring. 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 a 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 mode, 10V input is represented with 15 bits of data.
The input resolution is 0.305mV/count.
When an analog input is configured for current mode, 20mA input is represented with 14 bits of
data. There is 100% over range. The input resolution is 1.22µA/count.
Channel 5 analog input is configured for voltage mode only. 32.768V is represented with 15 bits of
data. The input resolution is 0.001V/count.
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
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6 Analog Outputs
The SCADAPack 350 may include two analog output channels if this option was requested at time
of purchase.
Refer to the TelePACE or ISaGRAF software manuals for information on how to use the
SCADAPack 350 Analog Outputs in application programs. Access to the analog output registers is
achieved using a Register Assignment in TelePACE or I/O connection in ISaGRAF.
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 4.4.3- 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 series with the current output channel and 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
discretization steps in the output signal range. The 0-20mA output range resolution is 4.88µA/count.
The table below shows the output current for several data values.
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