Nexus 1250 - Digital Dry Contact Relay Output (Form C) Module

Doc# E107706 9- 12
Electro Industries/GaugeTech
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9: External I/O Modules
9.7: Digital Dry Contact Relay Output (Form C) Module
9.7.1: Overview
The Relay Output Module consists of four Latching Relay Outputs. In Normal Mode,
the device accepts commands to control the relays. Relay output modules are
triggered by limits programmed with the Communicator EXT
TM
software. See the
Communicator EXT
TM
4.0 and MeterManager EXT Software User Manual for details on
programming limits.
The Nexus® 1250/1252 meter supplies power for up to 4 connected Relay 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 EIG’s PSIO.
Digital Dry Contact Relay Output Module Specifications
Model Number 4RO1: 4 latching relay outputs
Contact Type Changeover (SPDT)
Relay Type Mechanically latching
Communication RS485, Modbus RTU
Programmable Baud Rates: 4800, 9600, 19200,
38400, 57600
Power Requirement 2.0W max @ 12-20VDC
Operating Temperature
(-20 to +70)
o
C/(-4 to +158)
o
F
Switching Voltage AC 250V / DC 30V
Switching Power 1250VA / 150W
Switching Current 5A
Mechanical Life
5 x 10
7
switching operations
Electrical Life
10
5
switching operations at rated current
Factory Settings Modbus Address: 156
Baud Rate: 57600
Transmit Delay Time: 0
Default Settings (Reset Button) Modbus Address: 247
Baud Rate: 57600
Transmit Delay Time: 20msec