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PRECAUTIONS
Only trained and qualified
personnel are recommended to
install and set up the sensor.
1
INSTALLATION
• Single gang or double gang electrical boxes (ideally, non-metallic) may be used.
• Single gang electrical boxes are recommended for 4.75" square version.
• Set screws are 4/40 × 1/2" Allen head screws, adjusted with 3/32 Allen wrench (supplied).
• Mounting screws are #6-32 × 1/2" Phillips head screws.
Single Swing Doors
1.
Install the electrical box.
2.
Remove the two (2) set screws.
3.
Disassemble (i.e. slide up and pull out) the faceplate assembly from the mounting ring.
4.
Temporarily mount the mounting ring to the electrical box. Pay attention to "THIS END UP".
5.
Mark four (4) hole locations for installing the mounting ring.
6.
Remove the mounting ring from the electrical box.
7.
Install four (4) wall anchors.
8.
Mount (i.e. hand-tighten) the mounting ring to both the electrical box and the wall.
9.
Remove the back of the NEMA 4 enclosure.
10. Sections 2 (WIRING) and 3 (SETTINGS & ADJUSTMENTS) must be completed prior to continuing installation
(Section 4).
2
WIRING
IMPORTANT WIRING NOTES:
• Always use a BEA-provided isolation module (polarity-sensitive) for powering each MS21.
Red must be connected to power (+) and black connected to power (-).
• It is recommended that 300 V, low-voltage cabling, shielded wire be used during installation.
• It is recommended that the MS21 cabling have a distance of 6 inches around power lines 120 VAC/VDC
or higher.
• If using a wire harness with more than 5 conductors, all extra conductors must be wired at both ends to
Earth Ground.
Page 2 of 4
Always test the proper
operation of the installation
before leaving the premises.
Sim Pair Swing Doors
NOTE: Do not install the sensor within the swing path of the door.
Dual Egress Swing Doors
The warranty is invalid if
unauthorized repairs are made
or attempted by unauthorized
personnel.
Sliding Doors
75.5737.12 MS21H 20201014
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