Instruction manual

5.0 WIRING SM425 INSTRUCTION MANUAL
The preceding is recommended to prevent moisture or corrosive gas from entering the converter. Where
the ambient environment of the detector and the converter is well-maintained, wiring from the detector
directly to the converter without conduit is allowed.
This wiring carries power for the heater. Be careful to wire to the correct terminals and do not ground or
short circuit terminals, otherwise the instrument may be damaged
5.4 Wiring for Analog Output
This wiring is for transmitting 4 to 20 mA DC output signals to an external device, e.g. a data recorder.
Maintain the load resistance including the wiring resistance at 550Ω or less.
Figure 5-8 Wiring for analog output
5.4.1 Cable Specifications
For this wiring, use a 2-core or a 4-core shielded cable.
5.4.2 Wiring Procedure
1. M4 screws are used for the terminal of the converter. Each wire of the cable should be terminated
with the corresponding crimp-on terminal. Ensure the cable shield is connected to the ‘FG”
terminal of the converter.
2. “+” and “-” Polarities must be connected correctly.
5.5 Power and Grounding Wiring
This wiring supplies power to the converter and grounds the converter/detector.
42500001 REV A 89