Dorma EM 6900 AM B User manual

EM 6900 AM B
—
WN 058594-45532, 08/14
Description
The EM 6900 AM B used on mortise type of installation, requiring a filtered and
regulated DC Power source of correct voltage to attract the Armature plate and
when external pressure is applied to break that hold, the pivoting pin head fitted
into the Mechanical Electro Magnet slot holes will initiate a second locking
attempt from the upward movement of the magnet within the lock body to drag
out the six ball bearings to clasp firmly on the pivoting pin head with a superb
holding force of 8000 N and when power is removed the Mechanical Electro
Magnet would release its hold on the Armature plate and retract to its original
position as the bearing would roll back to release the clasp on the pivoting pin .
The EM 6900 AM B operates on 24V DC or 12V DC with two built-in SPST reed
switch sensor for remote lock monitoring status (Normally Open) on two non
polarity YELLOW output wires, and a remote door monitoring status (Normally
Open) on two non polarity BLUE output wires. The EM 6900 AM B consists of an
EARLY WARNING ALARM output C/NC/NO, Brown/White/Grey and a built-in
buzzer , to initiate warning before attempted break-in.
The DC output of the power supply must NOT be connected to earth ground, but
isolated to prevent shock and possible damage to the unit.
12V DC is not authorized for exit doors
Even a preload of 1000N is applied on the system
Buzzer can be disabled with the dip switch 4
2)
1)
3)
1)
2)
3)
Wiring and Power Input 24V DC or 12V DC:
Wiring must be connected correctly before on a 24V DC power source is
supplied to the lock to prevent damage to the unit.
TVR TVR
4
Buzzer OFF
Buzzer ON
4
ON
Buzzer
ON
OFF
12 3 4
P
O
BWRG
EW Wiring: GREY (NO)
WHITE (NC)
BROWN (C)
(Normally Open)
LSS wiring:
(Normally Open)
DSS wiring: BLUE
BLUE
YELLOW
YELLOW
ON
ON
OFF
OFF
1
1
2
2
3
3
12V DC SETTING
0.4A max.
24V DC SETTING
0.2A max.

EM 6900 AM B
—
2 DORMA
Typical installation 1
Pivoting Pin Assembly
35.5
15.5
12.5
35.5
15.5
214
195
166
Permanent magnet
Key screw
Security sleeve nut
Pivoting Pin
Spring
Free-Angle screw
Flat washer
Rubber
Flat washer
U bracket
NOTE: Make sure to have the rubber washer mount sandwich in
between flat washer for absorbing shock and obtaining the required
strength.
Applied drop-wise of provided
threadlockers glue to the thread
of the security sleeve nut to
prevent loosening

EM 6900 AM B
—
3DORMA
Typical installation 2
Instruction
Important safety precaution
Scribe for the cut-out area, follows wiring instruction and position the
EM 6900 AM B into the scribe area, use allen key to turn clockwise the back
locking screw mount up the unit tight against the door frame (refer to installation
diagram). The top piece sleeve nut must be screw tight and glue and must not pop
up higher than the flat armature surface.
Secure firmly the EM 6900 AM B mechanical electro magnet on the door frame.
The provided screws must be used in accordance with the frame or support
material.
Note: Sizes with (A) denote additional 1mm clearance.
Sizes with (B) denote additional 2mm clearance.
2mm allen key
2mm allen key
Door frame
Bearing sleeve nut
Back locking screw Drill holes,
4 places
4.2
9.5
21.5
12
35.5
36.5 (A)
7.75
15.5
166
176 (B)
186
5.5

EM 6900 AM B
—
Subject to change without notice
DORMA Deutschland GmbH DORMA Platz 1 58256 Ennepetal Tel. [phone] Fax [phone]
www.dorma.com
PROBLEM POSSIBLE CAUSE SOLUTION
Door will not
lock
No DC voltage to lock.
Check power and loose
wiring
Wrong wire connection. Check wiring, refer to
wiring instruction.
Bearing sleeve nut rise
higher than magnet flat
surface.
Screw in the bearing
sleeve nut at level with
surface with the provided
security screw.
Holding Force reduced
Bad physical contact
between armature plate
and magnet surface.
Make sure than surface
contact is cleaned and
well aligned with the
armature plate
There is a delay in
door release when
power off
The power switch-off is
disturbed by the power
supply stabilisation.
The power cut must be
done between the PSU
and lock. Not at the AC
input of the PSU.
Trouble Shooting
Maintenance
Contacting surface of the Mechanical Electro Magnet and Armature plate must
be kept free of contaminating materials. Surfaces should be cleaned periodically
with a non-abrasive cleaner. Do not spray the Mechanical Electro Magnet or
Armature plate surface with any lacquer chemicals. This will cause serious
problems with the release of the Mechanical Electro Magnet and its Armature
plate that would result to serious safety problems.