Access Plus Interface Board - DKS 1812 Owner's Manual

1.12 Access Plus Interface Board

The 1812 Access Plus interface board is piggybacked onto the main 1812 Plus circuit board. The
interface board provides additional connections to the 1812 for card readers, keypads and/or RF
receivers using RS-485 communication protocol.
The 1812 Access Plus can be programmed via a PC using a network or modem connection. An RJ-
45 connector is provided on the interface board for network connections.
1.12.1 RS-485 Connection
Use the RS-485 terminals to add up to six (6) card readers, keypads and/or RF receivers to the 1812
Access Plus system. These devices must be wired in a daisy-chain format with a maximum wire run
distance of 4000 feet. We recommend that you use Cat5e wire for all RS-485 wire runs.
Refer to the individual device wiring instructions for connection information and wiring guidelines for
these products.
Be sure to set programming commands 09 (section 2.6.2) and 07 (section 2.6.3) when connecting
RS-485 devices to the 1812 Access Plus system.
RS-485 DATA A ( + )
RS-485 DATA B ( - )
RS-485 COMMON
Terminals 4 – 8
are not used
with 1812
Access Plus
applications
1812-162-B-6-09
1
2
3
BAD DNS
4
5
6
7
8
RS-485 RX
LAN DOWN
ON
SW1 MODEM / TCP ENB
Phone Line
In Use
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