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- INSTRUCTIONS -

Form C Relay for 12-18V DC Intercom Systems with Door Release

WIRING DIAGRAMS:

Page 1

INSTALLATION:

1. Install in a suitable location, either near the power source for the door release mechanism, or behind the intercom.
2. Secure wire connections with proper termination, such as wire nuts or crimp connectors.
3. Trim the wires to the desired length. 
4. Cut the unused contact wire so the bare strands are not exposed.

RY-18L COLOR CODE:
Input of Relay:

Red:L/RED, Postive trigger
Gray:(-) NEGATIVE

Output of Relay:

Brown:COMMON
Orange: N.O. Contact
Yellow:N.C. Contact

(See contact rating specs on 
back page)

The RY-18L Door Release Relay Module is an interface between the door strike contacts on the Aiphone unit and the 
actual release mechanism. The contact ratings on Aiphone units vary, and are all Normally Open. If your strike or 
maglock is a higher voltage or draws more current than specified for the unit, the RY-18L is required. It provides either a 
Normally Open contact for an electric strike, or a Normally Closed contact for a magnetic lock. The contact rating 
supports a majority of door release hardware available on the market. This relay is recommended with all JF and JK  
systems when using the single door release feature, and for the LEM-1DL or LEF systems when connecting a maglock.

MAGNETIC LOCK WIRING METHOD:

(Normally Closed contact)
Lock Power: Power source for Magnetic Lock
When using 12-18V DC power, use the RY-18L.
When using 24V DC power, use the RY-24L.

LE-Series Sub

1

E

+

-

EL
EL

LEM-1DL

~
~

PT-1210N

1

E

-

Leave jumper 

between E and -

attached

Red

Gry

Brn

Org

Yel

COM

N/C

Use Brown & Yellow wires 

when connecting to Maglock.

LOCK 

POWER

RY-18L

Magnetic Lock

RED:   L/RED
BLK:   (-) Neg.
BRN:   Common
ORG:  N.O.
YEL:   N.C.

+

-

30405     0310

1

E

+

-

L

K1

1

E

-

LEF-5

LE-Series Sub

+

-

PS-1225UL

Red

Gry

Brn

Org

Yel

RY-18L

LOCK 

POWER

+

-

Magnetic Lock

COM

N/C

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