Chamberlain DH User Manual

APPLICATION REQUIREMENTS
This wiring modifi cation is available to models DJ and DH/J
Standard-Duty operators with 24Vac control circuits and “D1”
type wiring.
NOTE: If C2 or B2 wiring is desired refer to conversion
instructions on pages 2 and 3.
FUNCTIONS
This modifi cation stops the operator when extra tension is
sensed on the door from the mechanical door lock, obstruction
or extensive binding.
OPERATION
When the operator senses extra tension when closing, the Lock
Sensor will stop the operator. Press close button and run until
the operator shuts off (to unlock door when load removed).
LOCK SENSOR (D1 WIRING)
WIRING DIAGRAM & INSTRUCTIONS
Model: DH, DJ and DH/J
ADJUSTMENT
FINE ADJUSTMENT
• To increase opening force, tighten wing nut.
• To decrease opening force, loosen wing nut.
COURSE ADJUSTMENT (if required)
1. Release spring pressure on pivot arm.
2. Loosen but do not remove mounting screws (2).
3. Fully tension fi nal reduction chain and rotate Lock Sensor
until switch is in activation mode.
4. Tighten mounting screws (2) to secure Lock Sensor position.
5. Repeat fi ne adjustments.
Lock Sensor
Assembly
To adjust opening force
tighten or loosen wing
nut accordingly
Chain Idler Sprocket
must engage top side
of reduction chain
Final Reduction
Chain
Lock Sensor Switch
(held to normally closed)
Mounting
Screws
To avoid SERIOUS PERSONAL INJURY or DEATH from
electrocution, disconnect electric power to operator BEFORE
adjusting Lock Sensor.
FIGURE 1

Chamberlain DH Specifications

General

Brand	Chamberlain
Model	DH
Category	Accessories
Language	English

Summary

Lock Sensor Wiring Diagram & Instructions

Application Requirements

Specifies models compatible with this wiring modification and notes for other wiring types.

Functions and Operation

Details how the lock sensor modification stops the operator and its operational use.

Fine Adjustment

Instructions for adjusting the wing nut to control opening force.

Course Adjustment

Steps to adjust the Lock Sensor position for activation mode.

1PH Schematic Diagram

C2 Wiring Conversion

Instructions for converting to C2 wiring, requiring a STOP button.

B2 Wiring Conversion

Instructions for converting to B2 wiring, requiring a STOP button and safety edge.

Limit Switch Adjustment

Guide on how to adjust limit nuts for door travel and stopping positions.

3PH Schematic Diagram

C2 Wiring Conversion

Instructions for converting to C2 wiring, requiring a STOP button.

B2 Wiring Conversion

Instructions for converting to B2 wiring, requiring a STOP button and safety edge.

Limit Switch Adjustment

Guide on how to adjust limit nuts for door travel and stopping positions.

Control Connection Diagram

3 Button Station or 3 Position Keyswitch

Wiring diagrams for 3-button stations or 3-position keyswitches.

2 Button Station or 3 Position Keyswitch

Wiring diagrams for 2-button stations or 3-position keyswitches.

1 Button Station or Any Auxiliary Device

Wiring for single button stations or other auxiliary devices.

Sensing Device to Reverse or Stop

Diagram for connecting sensing devices to reverse or stop operation.

External Interlock

Diagram for connecting an external interlock system.