Installation Guide MX1 Fire Alarm System (NZ)
LT0360 ISSUE 2.43 29 NOVEMBER 2017 PAGE 18
Figure 28 – PIB Ring Network
PIB Wiring
The PIB and other network equipment are powered by the MX1 via one of the MX1’s +VBF supplies. This supply
must not be used for any directly-connected field wiring. Alternatively, the PIB, Moxa switch, and Ethernet Extender
(if present) can be powered off the LOOP INTERFACE supply terminals J33, using a fused lead (e.g., a spare
LM0459 supplied with an MX Loop Card). The PIB’s J24 serial port is connected using loom LM0576 to whichever
serial port (0, 2, 3 or 4) is configured in the MX1 for networking.
Figure 29 – PIB to MX1 Wiring
To enable the PIB to be used to remotely access the MX1 for programming, remote diagnostics or remote
operation, then a null modem serial cable LM0076 must be fitted between the PIB’s RS232 Port J22 and the MX1’s
Diag/Prog port J22 as shown in Figure 29.
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