BENSHAW RediStart EXEXMVRMX3 Series, User Manual

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RTD Module Installation
3.13 RTD Module Installation
3.13.1 Location
The mounting location for the Remote RTD Module should be chosen to give easy access to the RTD wiring, control terminals and
indicator LEDs as well as providing a location to mount the power supply. The Remote RTD Module is specifically designed to be
mounted close to the equipment it is monitoring. This eliminates long RTD wire lengths which save time and money on installation and
wiring. The Benshaw Remote RTD Module is designed to mount on industry standard 35mm wide by 7.5mm deep DIN rail.
3.13.2 Modbus Address
Set the rotary switch on the top of the Remote RTD Module to the desired Modbus address. Up to 2 modules can be connected to the
EXMVRMX
3
starter. The address set by the rotary switch must match the setting in RTD 01 or RTD 02. For example, setting both the
rotary switch and RTD 01 to 16 would make the connected module be module #1. The connected RTDs would then represent #1 to #8 in
the RTD programming.
3.13.3 Power Connections
The 24VDC power source is connected to the following terminals.
•
24VDC-: Negative connection to 24VDC power supply
•
24VDC+: Positive connection to 24VDC power supply
•
"
g
": Chassis ground connection
3.13.4 RS-485 Communication
The RS-485 communications wiring should use shielded twisted pair cable. The shield should only be terminated at one end. The
connections are as follows:
MX RJ45 Module Description
pin 5 A(-) RS-485 negative communications connection
pin 4 B(+) RS-485 positive communications connection
pin 8 Com RS-485 common connection
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3 - INSTALLATION
Figure 22: Remote RTD Module Mechanical Layout