Detex ML-1548 - Manual (Page 2)

ELECTRICAL INSTALLATION IMPORTANT NOTES
1. Use jacketed cable for all wire runs. Refer to the AWG wire
gauge chart for proper lock power wire size (18 AWG
gauge minimum).
2. All wires must be colored coded.
3. Use properly fused power source only. See Electrical
Specifications.
4. Make all ElectroMagnetic Lock terminal connections according to
Figure 3
INDOOR USE ONLY
Do not run power wires and signal wires in the same
cable or conduit.
AWG WIRE CHART
To determine the correct wire gauge to use on “one circuit” the following information is required :
1. The quantity, voltage, and current draw of all lock(s) to be used.
2. The distance in feet from the power supply to the furthest lock.
Add together the current draw (amps) of all locks on the same circuit. Cross reference the total amps with the distance between the
power source and the furthest lock to determine the wire gauge required. All wiring must be installed in accordance with all state and
local codes.
DISTANCE IN FEET FROM POWER SOURCE TO FARTHEST LOCKING DEVICE
Minimum
Wire
Gauge for
24 Volts
DC
AMPS
0.25
0.50
0.75
1.00
1.50
2.00
2.50
25 50 75 100 150 200 250 300 400 500 1000
18 18 18 18 18 18 18 18 16 16 16
18 18 18 18 18 16 16 14 14 12
18 18 18 18 16 14 14 12 12
18 18 16 16 14 14 12 12
18 18 16 14 14 12
18 16 14 14 12
18 16 14 12
TROUBLE SHOOTING .
ELECTRICAL SPECIFICATIONS
Voltage kickback protection standard
*NOTE: For a proper coil resistance reading, turn off the DC voltage. Use an ohmmeter and measure
the resistance between the pins of the plug connector positions E1-E2 and E3-E4
Page 2 103162
Page 3 103162
SERIES
INPUT VOLTAGE (VDC)
POWER CONSUMPTION (mA)
COIL RESISTANCE (OHMS)
HOLDING FORCE (LBS)
ML-1500
24
350
1650
35 (PER COIL) *
RT
TIME ADJ.
AVAILABLE OPTIONS
RT TIME DELAY (1-30 sec)
LOCK PWR -+
ELECTROMAGNET
PLUG CONNECTION
FIG. 3
LOCK
E4
E3
E2
E1
J1
No
t U
se
d
ML-1500 Series Connections
Figure 1
Regular
2-5/16"
59mm
Figure 1B
Filler Plate
Filler
Plate
2-5/16"
59mm
B
A
Figure 1C
Angle Bracket
2-5/16"
59mm
Angle
Bracket
B
A
P/N 103916 P/N 103917
FILLER PLATES: For extension of the stop to provide a
proper mounting surface on the underside of the header.
See Figure 1B.
FOR ML-1500 SERIES MODELS
PART #
103916
SIZE B A
5/8” x 1-1/4" x 11" (16 x 32 x 279mm)
ANGLE BRACKETS: Used as extension on shallow door
frames to provide adequate mounting surface.
See Figure 1C.
FOR ML-1500 SERIES MODELS
PART #
103917
SIZE B A
2” x 1-1/2" x 11" LG (51 x 38 x 279mm)
Available kits:
Armature hardware kit P /N 103918-1
ElectroMagnetic lock hardware kit P /N 103918-2
Problem
ElectroMagnetic lock releases
slowly. (residual magnetism)
Cause
Control switdch wired on DC side of power source
Solution
Control switch must be wired on DC side of power supply.
Poor holding force. Armature installed rigidly.
Armature must pivot loosely from its center mounting point to
permit full armature contact.
Low voltage Check for proper voltage at the ElectroMagnetic lock input. If
low, determine if the correct wire guage is being used to
prevent excessive voltage drop.
No holding force No power Check power supply load capacity. It must meed or exceed
the combined current rating of all locks on the circuit.
Door does not lock. Input polarity reversed. ElectroMagnetic locks require DC input voltage.
Check coil continuity with OHM meter. If reading is high
or open, replace the magnet coil. See Fig. 3 and the
Resitance Specifications.
Open circuit in ElectroMagnetic Lock coil .
Coil shorts or incorrect wiring will blow fuses.
Measure the coil for correct resitance. See Fig. 3
and the Resitance Specifications.
Magnet coil short.