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5.2 Wiring Procedure
This section explains how to establish a Modbus (RS-485 or Ethernet) network
.
For detailed wiring procedure, refer to the PS-7-M series gas detector’s instruction manual.
Turn off the gas detector before wiring to prevent electric shocks.
For precautions to be taken while wiring other than the Modbus terminals wiring, refer to 6.
“Installation and Wiring” of the PS-7-M series gas detector’s instruction manual.
Before powering on the unit, ensure the wiring is correct by referring to 6-1. “Wiring
Procedure” of the PS-7-M series gas detector’s instruction manual and the delivery
specifications if any.
The analog output line and power line of the gas detector are not isolated from each other.
When using with external devices, provide isolation to prevent noise from other power lines
from interfering with the analog output of the detector.
When wiring, place wires to avoid potential noise sources (e.g. large power transformers,
motors, and powers supply units).
Keep the connection cables (power and signal lines from the detector) away from other
power lines.
When wiring, place wires to avoid mechanical stress on the wiring.
