7 Human Machine Interface
PCS-9785 Satellite-Synchronized Clock
7-3
Date: 2019-07-05
LED
Display
Description
HEALTHY
Off
The device is out of service or any hardware error is defected during self-check.
Steady green The device is in service and ready for operation.
ALARM
Off
The device is in normal operating condition.
Steady yellow An abnormal alarm is issued.
MASTER
Off
The device is the slave in dual device redundancy strategy
Steady green The device is the master in dual device redundancy strategy
SYNC
Off
None synchronization signal is received.
Steady green
The device is successfully synchronized with at least one of the external time
sources.
PPS
Off
None pulse output
Flash green
The device is outputting pulse per second
PPM
Off
None pulse output
Flash green
The device is outputting pulse per minute
NOTICE!
"
HEALTHY
"
LED can only be turned on by energizing the device and no abnormality
detected.
"
ALARM
" LED is turned on as long as alarm exists. When all alarm signals disappear, it
will be turned off.
7.1.4 Debugging Port
There is a multiplex RJ45 port on the front panel. This port can be used as an RS-232 serial port
as well as a twisted-pair Ethernet port. As shown in the following figure, a customized cable is
applied for debugging via this multiplex RJ45 port.
P1
P2
P3
P1: To connect the multiplex RJ45 port. An 8-core cable is applied here.
P2: To connect the twisted-pair Ethernet port of the computer.
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