Main Terminal Description; Access Plus Interface Board; Rs-485 8-Pin Connector Description - DKS 1812 Access Plus Installation & Owner's Manual

1.11 Main Terminal Description

Phone In
(Twisted Pair) 1. Phone In (Negative - Ring)
OR
Wireless
2. Phone In (Positive - Tip)
Adapter
3. Ground (Required)
4. Phone Out (Positive - Tip)
Phone Out
(Twisted Pair)
5. Phone Out (Negative - Ring)
6. Not Used.
Emergency
7. Switch Input Relay 1. A switch closure across terminals 7 & 9
and/or Postal
will activate relay 1 for its programmed strike time.
Entry Switch
8. Switch Input Relay 2. A switch closure across terminals 8 & 9
will activate relay 2 for its programmed strike time.
Back-Up
9. - 12 VDC Battery Negative. Also Common for terminals 7 & 8.
Battery Power
10. + 12 VDC Battery Positive.
11. Relay 1 Normally Open
Relay 1
12. Relay 1 Normally Closed
(Access Control Device)
13. Relay 1 Common
14. Relay 2 Normally Open
Relay 2
15. Relay 2 Normally Closed
(Access Control Device)
16. Relay 2 Common
17. 16.5 VAC Input Power
Input Power
(Transformer) 18. 16.5 VAC Input Power

1.12 Access Plus Interface Board

The 1812 Access Plus interface board (1972-010) is piggybacked onto the main 1812 Plus circuit board (1970-010). The
interface board provides additional connections to the 1812 for keypads, card readers 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 jack (Cat5) is provided on
the interface board for network connections.

1.12.1 RS-485 8-Pin Connector Description

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.
DO NOT power RS-485 devices from the 1812. These devices must be supplied with their own power source. Refer to the
individual device wiring instructions for connection information and wiring guidelines for these products.
1970-010
J1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1812-162-V-5-16
WARNING
input voltage to terminals
9 and 10 is 14.5 Volts DC.
BATT CHARGE LED: When
battery is connected to 9
and 10, Green LED will
light when charging and
turn OFF when charged.
J4
RS-485 DATA A (+) 1
RS-485 DATA B (-) 2
RS-485 Common 3
4
Terminals 4-8
5
are not used
with 1812 6
Access Plus
7
applications.
8
1970-010
J1
1
2
3
4
5
6
7
8
9
10
11
12
13
Maximum
14
15
16
17
18
RS-485 RX
TERMINATION
LAN DOWN
BAD DNS
SW2
DATA TRANSMIT
LAN CONNECTION
J1
RJ-45
Jack
(Cat5)
KEYPAD
BATT
CHARGE
OV
MODEM / TCP ENB
SW1
PHONE LINE
IN USE
1972-010
J3
J4
1
2
3
4
5
6
7
8
M M MASTER
CODE
MIC VOL
19