Installation guide

VAR4 / VAR12 / VAR20 - Product Description
6.4.3 RS485 Port (EXP)
Pin No. Signal Description
1 Reserved
2 Reserved
3 0V Ground
4 Reserved
5 RS485 DXP
RS485 Communication Data +
(9600 baud)
6 Reserved
7 Reserved
8 Reserved
9 RS485 DXN
RS485 Communication Data –
(9600 baud)
1 2 3 4 5
6 7 8 9
RS485 DXN
0V
MALE
RS485 DXP
Other unused pins on this connector are for future expansion.
DO NOT MAKE CONNECTIONS TO THEM.
!
!
6.5 DC Supplies (PSU1, PSU2)
VAR Router requires 18-40 V DC supply.
PSU1 should come from a V400 Amplifier
Mainframe AUX DC SUPPLY OUT terminations.
Where possible, two mainframe outputs may be
paralleled to feed PSU1 (one from each of two
different mainframes) to provide a measure of
current sharing and redundancy.
PSU2 should come directly from the battery via a
fuse or breaker adequate to protect the cable from
the potentially dangerous short circuit currents
associated with SLA batteries. The ASL BDIST-2A
product provides this function.
Figure 24 PSU Connectors
PSU 1 PSU 2
- +
- +
Issue: 03 complete, approved
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