CHAPTER 9: EXTERNAL I/O MODULES ANALOG TRANSDUCER SIGNAL OUTPUT MODULES
EPM 9450/9650 ADVANCED POWER QUALITY METERING SYSTEM – INSTRUCTION MANUAL 9–9
9.5 Analog Transducer Signal Output Modules
9.5.1 Overview
The Analog Transducer Signal Output Modules (0 ±1mA or 4 to 20mA) are available in either
a 4- or 8-channel configuration. Maximum registers per request, read or write, is 17
registers.
The EPM 9450/9650 meter supplies power for up to two connected Analog Output
modules. See Section 9.2 for power and communication details. Refer to Section 5.6.2 to
determine if you must use an additional power source, such as GE’s PSIO.
All outputs share a single common point. This is also an isolated connection (from ground).
The Modbus Map for the Analog Output Module (and operating details) can be found in the
Modbus Communicating I/O Modules Manual.
Ta b l e 0
Analog Transducer Signal Output Module Specifications
Model Numbers 1mAON4: 4-channel analog output 0 ±1mA
1mAON8: 8-channel analog output 0 ±1mA
20mAON4: 4-channel analog output 4 to 20mA
20mAON8: 8-channel analog output 4 to 20mA
Accuracy 0.1% of Full Scale
Scaling Programmable
Communication RS485, Modbus RTU
Programmable Baud Rates: 4800, 9600, 19200, 38400, 57600
Power Requirement 15-20VDC @50-200mA; EPM 9450/EPM 9650 support up to two modules
Operating Temperature (-20 to +70)
o
C/(-4 to +158)
o
F
Maximum Load Impedance 0 ±1mA: 10k Ohms; 4-20mA: 500 Ohms
Factory Settings Modbus Addresses:
1mAON4: 128
1mAON8: 128
20mAON4: 132
20mAON8: 132
Baud Rate: 57600
Transmit Delay Time: 0
Default Settings (Reset Button) Modbus Address: 247
Baud Rate: 57600
Transmit Delay Time: 20msec
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