Instruction manual

SM425 INSTRUCTION MANUAL 5.0 WIRING
Figure 5-9 Power and Grounding wiring
5.5.1 Power Wiring
Connect the power wiring to the L and N terminals of the converter. Proceed as follows:
1. Use a 2-core or a 3-core shielded cable.
2. The size of converter terminal screw threads is M4. Each cable should be terminated with the
corresponding crimp-on terminal.
5.5.2 Grounding Wiring
The ground wiring of the detector should be connected to the ground terminal of the detector case. The
ground wiring of the converter should be connected to either the ground terminal of the converter case or
the protective ground terminal in the equipment. The grounding terminals of the detector and the
converter are of size M4. Proceed as follows:
1. Keep ground resistance to 100Ω or less.
2. If the ambient temperature of the wiring installation is 80 to 150°C for the detector wiring, use
wiring material with sufficient heat resistance.
3. When connecting the ground wiring to the ground terminal of the converter case, be sure the lock
washer is in contact with the case surface (see Figure 5-9.).
4. Ensure the jumper plate is connected between the “G” terminal and the protective ground
terminal of the converter.
5.6 Contact Output Wiring
Contact outputs 1 to 3 can be user programmed to "low limit alarm", "high limit alarm", etc. The function of
contact output 4 is fixed ("error output") and its action (contact closed during error condition) cannot be
changed.
When using these contact outputs, install the wiring as follows:
90 42500001 REV A