Instruction manual

SM425 INSTRUCTION MANUAL 5.0 WIRING
5.3.2 Connection to Detector
When connecting the cable to the detector, proceed as follows:
1. Mount cable glands or conduits of the specified thread size to the wiring connections of the
detector. The detector may need to be removed in future for maintenance, allow sufficient cable
length.
2. If the ambient temperature at the location of wire installation is 80 to 150°C, use a flexible metallic
conduit for the wire. If a non-shielded “600V silicon rubber insulated glass braided wire” is used,
keep the wire away from noise sources to avoid noise interference.
3. The size of the terminal screw threads is M3.5. Each cable should be terminated with the
corresponding size crimp-on terminals contact (*1) respectively.
*1 If the ambient temperature at the detector installation site exceeds 60°C, use a “bare crimp-on
terminal”.
•Before opening the detector cover, loosen the lock screw. If the screw is not loosened first, the screw will
damage the cover, and the terminal box will require replacement. When opening and closing the cover,
remove any debris to avoid gouging the thread.
•Use caution when closing the cover of the detector. After screwing the cover in the detector body, secure
it with the lock screw.
Figure 5-7 Detector lock screw
5.3.3 Connection to Converter
To connect the wiring to the converter, proceed as follows:
1. M4 screws are used for the terminals of the converter. Each cable should be terminated with the
corresponding size crimp-on terminals.
2. If a rubber insulated glass braided wire is used to wire the detector, use a terminal box. For wiring
between the terminal box and the converter, use PVC sheathed PVC insulated cable, rather than
wire.
88 42500001 REV A