4 How to Use
4-6. How to wire
- 21 -
<Grounding>
Connect the detector to your grounding terminal with the external terminal
.
<Wiring Example>
Connecting to the indicator
Connecting to the upper unit (DCS, PLC)
1 2 3 4 5
GND
Sig
SD-1
+24 V
RM-5003, etc.
1 2 3 4 5
+
SD-1
-
Upper unit
(DCS, PLC)
Relay terminal
plate
-
+
Power supply
(24 VDC)
WARNING
Before turning on the detector, do not forget to connect it to a grounding terminal.
For stable operation of the detector and safety, it must be connected to a grounding terminal. Do not
connect the grounding wire to a gas pipe.
The grounding must be made as D type grounding (below 100
Ω
of grounding resistance).
For the grounding wire, use cable lugs to safely connect it to a grounding terminal without looseness
or twist.
Use ring terminals to connect the grounding terminal with the ground and use the grounding wire with
cross-sectional area of 4 mm
2
or more for the external grounding terminal.
