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(1) Run a power cable thru the grommet (located at
the bottom of the base unit), and connect the
cable wires to their corresponding terminals
(refer to “Terminal layout” on page 14).
(2) Run a RS-485 digital signal cable thru the
grommet (located at the bottom of the base unit),
and connect the cable wires to their
corresponding terminals
(refer to “Terminal
layout” on page 14).
Use shielded twisted pair cable for RS-485 wiring. Cable length: Max.1.2 km
Single-point grounding (grounding at a single point) is mandatory. When the
cable shield from the gas detector is grounded on the power supply side, DO
NOT ground the shield cable to the Earth terminal located inside the gas
detector (on the terminal block for power cable) to avoid 2-point grounding..
Requirements for LAN cable
Use unshielded twisted pair (UTP) LAN cable, solid wire, category 5e or
higher.
Do not use a flat type twisted pair LAN cable.
If used in a place exposed to electrical noises, use a shielded twisted pair
(STP) cable for added resistance to external interference.
Cable length: Max.100 m
Refer to the separate PS-7-M communication specifications guide.
NOTE
Terminal
block for
signal
cable
Terminal
block for
power
cable
