VAR8-ACU and Variants - Installation Guide
1.1 Installation Requirements
• The VAR8-ACU unit.
• A 19-inch standard rack and wiring for power supply, signal monitoring, and RS232 and RS485 cabling
as appropriate.
• A small flat-bladed screwdriver.
• Large pozidrive screwdriver.
• Cable termination tools - cutters/strippers etc. to suit cable type.
1.1.1 Cabling Requirements
The following cabling is recommended within the equipment rack. For pinout refer to Figure 1 (page 5), and
for cabling connector refer to Section “2 Connections” (page 11).
1. DC power supply cabling:
Standard cable rated for 3 A.
Recommended type: BELDEN 8205LSHF.
2. Audio input:
Twisted pairs, individually screened.
Recommended type: BELDEN 8451 LSHF.
The rack and field cabling should be as described in the diagram shown in Figure 3.
3. Audio and data network cabling:
Twisted pairs with overall foil screen.
Recommended type: FS cables 2407 POFYH.
The Upstream side of the network connection is isolated RS485. The rack and field cabling should be as
described in the diagram shown in Figure 2.
4. Other cabling:
Overall screened.
Recommended type: BELDEN LS0H.
The rack and field cabling should be as described in the diagram shown in Figure 3.
The use of screened cables where specified is necessary for EMC compliance. Also for EMC
compliance, rack and field cabling should be according to the specified diagram.
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Issue: 02 complete, approved
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