Individual Components for DB System:
DB-1MD Tenant master station, max. 1 per tenant
DB-1SD Tenant sub station, max. 4 per tenant
DA-1DS Single button door station
DA-2DS Two-button door station
DA-4DS Four-button door station
PT-1211C 15VAC transformer, 1 per DB-1MD master, and 1 per 2 DB-1SD sub stations
Pg. 2
COMPONENTS & WIRING
2
2
2
22
2
2
4444
A
B
IER-2
DB-1MD DB-1SD DB-1SD DB-1SD DB-1SD
C
2
C
C
C
2
DA-1DS
Request
to Exit
Button
C
Wire Distance Chart
A
B
C
22AWG
360'
330'
180'
20AWG
660'
330'
330'
18AWG
1020'
330'
510'
PT-1211C PT-1211C PT-1211C
C
2
B1
B2
B3
B4
B1
B2
B3
B4
~ ~
15V
IN
OUT
B1
B2
B3
B4
B1
B2
B3
B4
~ ~
15V
IN
OUT
B1
B2
B3
B4
B1
B2
B3
B4
~ ~
15V
IN
OUT
D
E
B1
B2
B3
B4
BL+
BL-
~ ~
15V
~ ~ ~ ~
DA-1DS
PT-1211C PT-1211C PT-1211C
DB-1MD DB-1SD DB-1SD DB-1SD DB-1SD
1
E
IER-2
Request to
Exit Button
Org
Yel
EL-12S
B1
B2
B3
B4
B1
B2
B3
B4
~ ~
15V
IN
OUT
Brn
Red
~ ~
* NOTE: Power wiring must be in a separate
jacketed cable from 4-conductor intercom wiring.
Option Switch Output for
Light, Gate, Garage, etc.
N/O Dry contact 24V 1.6A
+
-
Blk
Red
Blu
Org
Org
To Bell or
Light and
Power
AB
TAR-3
SKK-620
D
E
L
L
~ ~
15V
Org
Yel
Use the TAR-3 to trigger an external bell or light.
This relay can be used in place of the IER-2.
External Signaling
Optional
Device
Optional
Device
Power
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