Led indicators, Connectors, P1 - rs-485 disable – Gasboy CFN Series Diagnostic Manual User Manual

Page 33: P2 - rs-485 pcu/rt communications port, P3 - rs-485 console communications port, P4 - rs-232 remote communications port, P5 - rs-232 local communications port, P7 - ac power sense input, P8 - dc power input

Site Controller I

0021

2-7

LED Indicators

LED indicators are provided to allow you to
monitor the CPU's operation.

Connectors
P1 - RS-485 Disable

NOTE: P1 is found only on the original Site Controller CPU board and pre-Rev. A Memory Plus

CPU boards. It is not present on Rev A Memory Plus or 512 CPU boards.

P2 - RS-485 PCU/RT Communications Port
P3 - RS-485 Console Communications Port
P4 - RS-232 Remote Communications Port
P5 - RS-232 Local Communications Port
See the charts shown earlier in this section for the exact pinouts of these connectors.

P7 - AC Power Sense Input
This is used to monitor the AC voltage so the microprocessor can be warned of an impending
power failure.

P8 - DC Power Input