Schlage M420 User manual

M400 Series
Electromagnetic Locks
Installation Instructions for Single Locks
M420, M450, M490
FEATURES
Automatic Voltage Selection (AVS)
Magnet immediately detects 12VDC or 24VDC when power
is connected.
Anti-Tamper Switch (ATS)
An indication is provided should the magnet cover become
unsecured from lock.
Magnetic Bond Sensor (MBS)
Detects proper bond between magnet and armature. It can
be monitored remotely and locally with an LED.
LED
Provides local indication of MBS status.
Door Position Switch (DPS)
Indicates whether door is open or closed. this feature is used
in conjunction with the MBS.
Relock Time Delay (RTD)
Relock time can be changed. Range is 1 - 30 seconds.
MODELS
M420 (Traffic Control)
UL1034 and 10C/500lb and 3hr rating
M450 (High Security)
UL1034 and 10C/1000lb and 3hr rating
M490 (Max Security)
UL1034 and 10C/1500lb and 3hr rating
TRIMS
Basic
Auto Voltage Selection (AVS) for 12 or 24VDC
Plus
Basic features + Door Position Switch (DPS), Magnetic Bond
Sensor (MBS), Relocking Time Delay (RTD), LED Status
Indicator (LED) and Anti-Tamper Switch (ATS)
UL Requirements:
• Units shall not impair operation of panic hardware mounted on door.
• Units shall not impair intended operation of an emergency exit.
• Units/Models are intended to be connected to UL Listed Equipment, not
intended for Burglar or Fire Alarm Initiating or Indicating Devices.
• Ambient Conditions - “For Indoor Use Only”
This device complies with part 15 of FCC rules.
Operation is subject to following two conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received, including any
interference that may cause undesired operation. Changes or modifications
not expressly approved by party responsible for compliance could void
user’s authority to operate equipment.

2
ELECTRICAL SPECIFICATIONS
Model
Amps (12VDC)
Per Lock
Amps (24VDC)
Per Lock
Holding Force
(lbs) Per Coil
M420 0.750 0.380 500
M450 0.750 0.380 1000
M490 0.650 0.350 1500
LOCK INSTALLATION
1 PREPARE FOR INSTALLATION
1a Determine Proper Magnet Orientation
• Magnet should be placed opposite of door hinges.
Magnet
Wiring Cover
LHR Door - Shown from Exterior
Magnet Wiring Cover
RHR Door - Shown from Exterior

3
1b Reorient Magnet (if necessary)
• Remove screws, wiring cover and end blocks.
End Block
Magnet
End Block
(with screw hole)
• Rotate magnet, end blocks and wiring cover as shown, then reassemble.
Magnet
Wiring Cover
End Block
(with screw hole)
1c Place Template and Mark Holes
• Place template on top corner, opposite of hinges.
• Mark holes and prepare them per template.
LHR
RHR

4
2 INSTALL MBS INDICATOR (OPTIONAL, PLUS MODELS ONLY)
2a Remove Cover 2b Drill Hole for MBS Indicator
Bottom
0.75"
(19mm)
¹⁄₄" (6 mm) drill bit
M420: 0.50" (13 mm)
M450/490: 0.75” (19mm)
0.25"
(6 mm)
hole
2c Install MBS Indicator
3 INSTALL ATS (OPTIONAL, PLUS MODELS ONLY)
3a Remove End Block and Wiring Cover
a
c
b
3b Install ATS and Reassemble
d
e
f
ATS

5
4 ATTACH ARMATURE TO DOOR
4a Install as Shown
Outside
2x
5 INSTALL MOUNTING BRACKET INTO FRAME
5a Attach Mounting Bracket Temporarily
• Install two middle screws into slots and partially tighten.
Partially
tighten
Pull wires
OUTSIDE
Actual Size
Reinforced
Metal
Sheet
Metal

6
5b Remove Wiring Cover 5c Slide Magnet onto Bracket
OUTSIDE
5d Align Magnet to Armature
• Close door.
• Press magnet to fully engage with armature.
• Mark bracket location.
Press magnet to armature
INSIDE
Mark here
5e Fully Attach Bracket
• Remove magnet from bracket.
• Check bracket alignment with marks.
• Fully tighten two screws in slotted holes.
• Drill four (4) remaining holes.
• Fully tighten all screws.
Fully tighten
all screws
Drill four (4) holes
Use 10-24 tap if
metal reinforced
Check
alignment
OUTSIDE
Actual Size
Reinforced
Metal
Sheet
Metal

7
6 INSTALL LOCK
6a Install Magnet and Secure with Screws
Actual Size
7 CONNECT WIRING TO BOARD (STANDARD MODEL)
7a Review Wiring Connections
TB1
Printed Circuit Board
DC Power DC (+)
DC (-)
From Magnet
7b Connect Wires to Board
From Door Frame
DC Power Wires
From Magnet
7c Install Cover

©2011 Schlage Lock Company
Printed in China
44487296 Rev. 04/11-c
8 CONNECT WIRING TO BOARD (PLUS MODEL)
8a Review Wiring Connections
TB1
TB2
TB3
DC Power
NO
NC
C
NO
NC
C
DC (+)
DC (-)
MBS: 1A, 30VDC, Resistive
Contacts shown
in de-energized state
DPS: 0.25A, 30VDC, Resistive
Contacts shown
in open-door state
From Magnet
Printed Circuit Board
From LED
From MBS
From MBS
RTD Adjuster
RED
Polarized
Black/Red
Note: Two MBS
plugs are
interchangeable
Min.
Time
Max.
Time
8b Connect Wires to Board
From Magnet
From Door Frame
Multi Wire Cable
From LED
From MBS (2)
From MBS (1)
8c Connect ATS Wires
ATS
NC (violet)
NO (gray)
C (white)
Switch Rating:
1A @ 30VDC, Resistive
8d Install Cover