
3.2 Relay Numbering and Control
The model 1833, 1835 and 1837 telephone entry systems each have three relays (Relay 0, 1, and 2) on the
control board while the 1834 and 1838 systems each have two (Relay 1, 2) relays. When Tracker™ boards are
added to the system, the output relay on the Tracker™ boards are listed in the software sequentially, beginning
with relay 3 (Relays 0, 1 and 2 are on the main control board). Tracker boards cannot be added to the 1834
system.
When Tracker™ boards are used to expand the access control system, relays 1 and 2 are used as Tracker™
Command (Cmd) relays with Relay 2 commanding Tracker™ boards 1-8 (system relays 3-10) and Relay 1
commanding Tracker™ boards 9-16 (system relays 11-18). Refer to Figure 18.
1833, 1835 and 1837 SYSTEMS ONLY
If both Relay 1 and Relay 2 are used to control Tracker™ boards, Relay 0 is used as the Primary Relay that will
open a visitor door or gate when the resident pushes "9" on their telephone. Refer to section 3.1.3.
DOOR 1
System Relay 3
DOOR 2
System Relay 4
DOOR 3
System Relay 5
DOOR 4
System Relay 6
DOOR 5
System Relay 7
DOOR 6
System Relay 8
DOOR 7
System Relay 9
DOOR 8
System Relay 10
DOOR 9
System Relay 11
DOOR 10
System Relay 12
DOOR 11
System Relay 13
DOOR 12
System Relay 14
DOOR 13
System Relay 15
DOOR 15
System Relay 17
DOOR 14
System Relay 16
DOOR 16
System Relay 18
Tracker
Boards 1-8
Wiegand Input
Command Relay 2 Output
Wiegand Input
Command Relay 1 Output
Tracker
Boards 9-16
Visitor Door / Gate Control (1833, 1835, 1837 Only)
System Relay
Numbering Scheme
1833, 1835, 1837,
1838
Control Board
Rly 1
Rly 2
Rly 0
12
11
3
4
5
6
7
8
9
10
2
1
14
13
Figure 18
1835-066-F-8-08 Page 23
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