© MOBATIME
10 / 24
800916.03
4.5
Time signal outputs
The NMI is equipped with two time signal outputs: MOBALine and DCF current loop.
4.5.1 MOBALine
B A
• frequency modulated MOBALine time signal for self-setting slave clocks.
(TREND, SEM40/SAM40, SAM 00)
• output format:
local time
• electrical properties:
20V / 50Hz
4.5.2 DCF 77 current loop
- +
• synthetic DCF time signal for synchronizing sub-master clocks (e.g. ETC).
• output format:
local time
• electrical properties:
passive current loop output
opto-coupler:
U
max
=30V, I
on
=10..15mA, I
off
=2mA @ 20V.
5
Monitoring TREND clocks
Using an NMI and MOBA-NMS, up to
max. 12 TREND
clocks can be monitored. Detailed in-
structions for configuration and monitoring can be found in the TREND clock manual (BE-
800913).
6
Mounting and commissioning
In order to mount the NMI and to launch it for the first time, the following process can be used:
1. Mount NMI to desired spot
2. Connect Ethernet cable with PoE supply
3. Configure using MOBA-NMS
4. Connect MOBALine slave clocks to line input
5. Alternatively, connect DCF current loop, if a sub-master clock shall be synchronized
6. If desired, configure TREND clocks for monitoring (see chapter 5)
7. After a short period of time, the alarm LED (red) should go out and the sync LED (green)
should light up
Notice:
The NMI must be synchronized before TREND clocks can be configured!