Chatsworth Products Remote Infrastructure Management System Protocol Converter - Manual (Page 16)

RIM-Protocol Converter User Guide - Version 1.0
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2.3. Wire the Protocol Converter
If you plan to use the EIA-485 port for Modbus RTU communication, CPI recommends an 18 AWG shielded,
twisted-pair stranded copper wire for the connection. CPI recommends no more than 2,000 feet (609.6m) of
wire at this specification.
2.3.1 Power Supply & Ground Connections
To provide power and ground connections to the Protocol Converter:
1. Connect an 18 AWG ground wire from the ground terminal to a suitable earth ground.
2. Connect power to the Protocol Converter in one of two ways, as shown in Figure 2.2:
a. Plug the wall adapter (provided) into the power jack on the Protocol Converter and into a UPS outlet.
b. Connect a dedicated 24VDC power supply to the + and - terminals to the left of the power jack.
IMPORTANT: CPI recommends powering the Protocol Converter from a UPS (uninterruptible
power supply) so the Protocol Converter can send alarm notifications during a power outage.
Figure 2.2 24VDC Power Supply Connection