11 Technical Appendix
11.6.23.3 Pre-selection
Depending on whether the IMS system is redundantly equipped with RSC module and two reference clocks or
with an SPT module with only one reference clock, different relay states can be selected. This must be selected
by setting the jumper before installing the REL1000 module.
Jumper setting in redundant operation
.
In redundant operation, the jumpers on the REL1000 are set as follows on delivery (see Fig. blue mark). Both
clocks and the switchover unit are monitored.
Notification
CLK1- Fail
PPS-Fail
CLK2- Fail
10MHz-Fail
RSC-Fail
or Notification
A
B
C
Jumper setting in operation with one reference clock
.
If only one reference clock is used, the jumpers of the REL1000 are set as follows on delivery: (Relay A:
CLK1-Fail; Relay B: PPS-Fail; Relay C: 10 MHz-Fail). In addition, relays A + C can also be switched by
notifications (events).
Possible configurations of the error output:
Relay A:
Clock 1 / event notifications
→
Relay
Relay B:
Clock 2 / PPS
Relay C:
10 MHz / RSC or event notifications
→
Relay
IMS - LANTIME M500
Date: 28th May 2021
141
