Model: MC-1-DE
Doc Ref. No:-m05dom102
Issue No:-00
Page 59 of 76
User’s Manual
10. Relay and Pulse Outputs
10.1 Relay Contact Outputs
GPS TIME SYNC UNIT MC-1-DE device is equipped with 2 Relay contact outputs for indication of
WATCHDOG alarm and GPS LOCK status alarm on Front panel of unit. Factory set configuration for
relay contacts for all two mentioned outputs is C-NO terminal. Below table represents the relay con-
tact status in various modes.
Note: Relay configuration is factory set configuration, user cannot change the configuration. If user
wants to change relay contact configuration please contact masibus customer support.
Relay Contact Configuration: C - NO
MODE
WATCHDOG RELAY
STATUS
GPS LOST RELAY
STATUS
Unit Power OFF
Contact Open
Contact Open
At Power ON
Contact Close only
after some time when
the o/p is available on
any of the o/p port.
Contact open (if GPS is
UNLOCK)
or
Contact Close (if GPS is
LOCK).
Power fail
-
-
Unit Healthy
Contact Close
Contact close if GPS is in
Lock condition.
GPS LOCK
-
Contact close
Relay Contact Configuration: C – NC
Unit Power OFF
Contact Close
Contact Close
At Power ON
Contact is close but
contact open after
some time when the
o/p is available on
any of the o/p port.
Contact close (if GPS is
UNLOCK)
or
Contact open (if GPS is
LOCK)
Power fail
-
-
Unit Healthy
Contact open
Contact open (GPS is in
LOCK condition)
GPS LOCK
-
Contact open
Table 7 Relay contact Output
10.2 Pulse Outputs
10.2.1 1PPS output
GPS Time Sync Unit MC -1-DE device provides 1PPS output at every 1 second through its BNC ter-
minal on rear panel of unit. This is TTL signal of 0(low level) to 5V (high level) value. The Pulse width
of 1PPS signal is 20% duty cycle i.e. 200 milliseconds (high level) and 800 milliseconds (low level).
10.2.2 Additional Event Outputs (Programmable Pulse Outputs)
GPS TIME SYNC UNIT MC-1-DE device is equipped with the (optional) feature of providing Two ad-
ditional event outputs. These events provide pulse output according to configured time interval and
ON time. Each event time can be configured with time interval ranging from 1 sec to 86400 seconds
