Product manual

Installation instructions, LTU cabling
Technical Product Manual - DCT1800-GAP
TD 92093 (1/LZBNB 103 108 R4D) / 2006-03-09/ Ver.C
© 2006
134
23.2 Installation
23.2.1 Normal connection
LTU/MDF cable set
1. Connect the plug of the longer
1
of the two LTU/MDF cables (REX-CAB9002 (TSRNB 101 31)) or
the long cable (REX-CAB9004 (TSRNB 101 44)), to the upper connector of the rightmost LTU as
shown in figure
90.
2. Connect the plug of the shorter of the two LTU/MDF cables (REX-CAB9002 (TSRNB 101 31) or
the long cable REX-CAB9004 (TSRNB 101 44)) to the lower connector of the rightmost LTU.
3. Screw the shielding clamp of the longer of the two LTU/MDF cables cable to the rightmost free
position on the ground strip using two M3 x 10 torx 10 screws delivered with the modular cabinet.
4. Screw the shielding clamp of the shorter of the two LTU/MDF cables to the next rightmost free
position on the ground strip.
5. Connect both LTU/MDF cables to an MDF starting with the shortest (cable pair 1 of LTU/MDF cable
REX-CAB9002 (TSRNB 101 31) or REX-CAB9004 (TSRNB 101 44)) (see table 7).
Note:
To meet the EMC requirements, the cable should never be cut to a length shorter than 2.5 m.
Signalling ground for LTU when using earth signalling for recall
The signalling ground is only applicable when earth signalling is used instead of timed break (hook
flash) signalling. The MCCB connects the signalling ground from the PBX to maximum 7 LTUs. In
case the radio exchange consists of more modular cabinets the signalling ground connections on the
MCCBs are interconnected.
1. Connect the PBX signalling ground from the MDF to the PBX screw connector on the MCCB.
2. If more modular cabinets are used in a system, chain the PBX connectors.
3. Connect an LTU/MCCB ground cable REX-CAB9014 (TSRNB 101 035/2) to the LTU1 connector
on the MCCB.
4. Connect the other end of the LTU/MCCB ground cable to the LTU ground connector on the leftmost
LTU (see figure
90).
1. Measure the distance from plug to ground strip.