Installation Instructions
Original Instructions
440G-MZ Guardmaster Safety Switches
Catalog Number 440G-MZS20SNRJ, 440G-MZS20SNRJE, 440G-MZS20UNRJ, 440G-MZS20UNRJE, 440G-MZS20SNLJ, 440G-MZS20SNLJE,
440G­MZS20UNLJ, 440G­MZS20UNLJE
ATTENTION: Read this document and the documents that are
listed in Additional Resources on page 6 about installation,
configuration, and operation of this equipment before you
install, configure, operate, or maintain this product. Users are
required to familiarize themselves with installation and wiring
instructions, and requirements of all applicable codes, laws,
and standards.
Only suitably trained personnel must perform activities
including installation, adjustments, commissioning, use,
assembly, disassembly, and maintenance in accordance with
applicable code of practice.
If this equipment is used in a manner that the manufacturer
does not specify, the protection that is provided by the
equipment may be impaired.
Introduction
ATTENTION: Do not attempt to install this device unless the
installation instructions have been studied and understood.
This document acts as a guide for a typical installation and
translations are available at rok.auto/literature. A user manual
is also available (see Additional Resources on page 6).
Figure 1 - Assembly Overview
Actuator
Switch Body
Topic
Page
Summary of Changes
1
Introduction
1
Installation
1
Commissioning — Unique Coded Models
2
Auxiliary Release
3
Approximate Dimensions
4
Pin Assignment
4
Connection in a GuardLink System
4
Specifications
5
Status Indicators
5
Lock Command
6
Catalog Number Explanation
6
Accessories
6
Additional Resources
6
Summary of Changes
This publication contains the following new or updated information. This list
includes substantive updates only and is not intended to reflect all changes.
Topic
Updated Catalog Number list.
Page
1
Added Escape Release model to Figure 1.
1
Updated Figure 4.
2
Updated Minimum Distance Between Switches section.
2
Added Figure 9.
3
Added Attention to Auxiliary Release section.
3
Added Escape Release section.
3
Added Figure 12.
4
Updated Specifications section.
5
Updated Catalog Number Explanation section.
6
Updated Accessories table.
6
LINK and DEVICE
status indicators
Standard
Model
Escape Release
Model
The 440G-MZ Guardmaster® Guard Locking Switch locks a guard door in the closed
position and does not release it until the hazardous machine functions that are
covered by the guard are in a safe condition. The safety control system only allows
the hazardous machine functions to operate when the guard is closed and locked.
Qualified personnel must install the switch in accordance with these instructions.
ATTENTION: This device is intended to be part of the safetyrelated control system of a machine. Before installation, a risk
assessment must be performed to determine whether the
specifications of this device are suitable for all foreseeable
operational and environmental characteristics of the
application. See Specifications on page 5 for certification
information and ratings.
Use appropriate screws, bolts, or nuts that are fitted by tools to
mount the switch and actuators to avoid the risk of tampering.
Do not over torque the mounting hardware.
Installation
ATTENTION: Do not defeat, tamper, remove, or bypass this
unit. Severe injury to personnel could result.
The presence of spare actuators can compromise the integrity
of the safety systems. Personal injury or death, property
damage, or economic loss can result. Appropriate
management controls, working procedures, and alternative
protective measures should be introduced to control their use
and availability.
440G-MZ Guardmaster Safety Switches Installation Instructions
Figure 6 - Three Directions of Approach
Figure 2 - Required Mounting Hardware for Switch and Actuator
2
2 x M5
3 x M5
3
Max screw torque
2 N•m (17.7 lb•in)
1
IMPORTANT Do not use a washer with the screw at the base of the switch
body. The use of a washer causes the plastic to crack.
Loctite 242 thread-locking adhesive is known to cause stress
cracks in the plastic housing of the 440G-MZ safety switch
and should not be used. Lab tests have determined that
Loctite 425, a cyanoacrylate adhesive, does not cause
cracking and can be considered if the faster cure time is
acceptable in the application.
Commissioning — Unique Coded Models
The actuator teach process is not performed at the factory and must be performed
when the switch is first put into use. After the first-time learn, this process can be
repeated up to seven more times with unique coded replacement actuators.
During commissioning, connect the switch as shown in Figure 7.
Figure 7 - Wiring
Figure 3 - Actuator Function
Figure 4 - Orientation of Assembled Switch
+24V DC
NC
Black
Gray
Blue
NC
NC
Gnd 0V
DEVICE
LINK
The flexible actuator bends, rotates, and slides to accommodate guard door
misalignment (Figure 3). For optimal performance, verify that the locking bolt can
enter and withdraw from the tongue actuator without binding. A separately
mounted door latch is recommended to avoid door misalignment.
Brown
White
889D-F5NC-x
or 889D-F5BC-x
First Time Learn
Apply power to the switch without the actuator present. After the switch completes
the power sequence (approximately 8 seconds), the status indicator flashes green
eight times, which indicates the total number of times a new actuator can be
learned. This status indicator sequence repeats until an actuator is inserted in the
switch (in the guard closed position).
Table 1 - Commissioning Process for Unique Coded Switches
Step
1
Minimum Distance Between Switches
As shown in Figure 5, a minimum of 100 mm (3.94 in.) must separate a pair of
switches to help achieve correct operation.
IMPORTANT
If the minimum separation distance is not observed,
the electromagnetic fields interact causing crosstalk.
Crosstalk can result in nuisance faults and false
operation.
This restriction applies to any pair of Guardmaster safety switches that use RFID
sensing technology, including 440N-Z SensaGuard™ interlocks, or TLS-Z and
440G-LZ guard locking switches.
Figure 5 - Minimum Distance between Switches [mm (in.)]
100
(3.94)
2
(1)
(2)
State
Actuator Present
Approximate Duration
Status Indicators
15 s
• Flashing 8x green, repeating (1)
• Steady red (learning a
replacement actuator)
Flashing red/green, slow
2
Verifying Actuator
15 s
3
Programming Switch
15 s
Flashing red/green, fast
4
Program Finalization
15 s
Flashing green (number of times
a new actuator can be learned)
5
Run Mode (2)
—
Steady red
Out of box condition only.
When teaching an actuator, the switch must be unlocked to insert the actuator. At the completing
program finalization, the switch remains unlocked and in the safe state.
IMPORTANT
After teaching a new actuator, a power cycle is required to
complete the process.
Learn Additional Replacement Actuators
The switch automatically starts a new teach process (Table 1) when a unique coded
replacement actuator is inserted in the switch (in the guard closed position).
100
(3.94)
IMPORTANT
When the switch learns a new actuator, it no longer
recognizes previously learned actuators.
Rockwell Automation Publication 440G-IN018C-EN-P - September 2021
440G-MZ Guardmaster Safety Switches Installation Instructions
Lock the Actuator Code
Figure 9 - Auxiliary Release Operation — Escape Release Model [mm (in.)]
If the actuator is removed from the switch and then reinserted into the switch
during the 15-second Program Finalization stage (see Step 4 in Table 1), this action
triggers the switch to LOCK the actuator code. This action can be performed during
any of the eight unique coded actuator learn cycles.
IMPORTANT
After a unique coded actuator is locked using this method,
the switch cannot learn additional replacement actuators
for the remaining life of the switch. If the actuator is lost or
damaged, the switch must be replaced.
1
1
Remove screw.
2
Engage 2…3 threads of the auxiliary release tool into the release key.
3
Use the tool to pull the release forward to retract the locking bolt.
Reset the escape release by pushing the key back to the original position. The
actuator can now be removed from the switch.
The following indicator patterns repeat until a Power Off/On cycle is completed.
Error Code
Red-red-red-green
Cannot learn a standard actuator
Red-red-red-green-green
Actuator already learned
Red-red-red-green-green-green
Bad RFID; actuator moved out of range
Red-red-red-green-green-green-green
Exceeded learning eight actuators
Red-red-red-green-green-green-green-green Unit locked: cannot learn another actuator
Auxiliary Release
Operation of the auxiliary release causes a fault condition.
To reset the switch, cycle the power or issue a RESET command over the link in a
GuardLink® safety system.
ATTENTION:
• For infrequent use only. The auxiliary release is not intended
for routine access or maintenance. It is intended to be used in
exceptional cases only, such as when power is lost and an
emergency release is unavailable.
• Do not operate the machine while the auxiliary tool is attached
to the switch.
• To help prevent accumulation of debris inside the switch,
return the screw that is removed in step 1 immediately after
using the auxiliary release tool and tighten the screw to
0.56 N•m (5 lb•in).
Figure 8 - Auxiliary Release Operation— Standard Model [mm (in.)]
3…5
Step Description
Error Codes
Status/Diagnostic Indicator
2
4
A built-in spring assists with reset of the escape release.
5
Open the guard door. If the guard door does not open, repeat step 3 and step 4.
6
Unscrew the auxiliary release tool and replace the screw that was removed in step 1.
Tighten the screw to 0.56 N•m (5 lb•in).
Escape Release
The escape release is used to open a locked safety guard from inside the
safe-guarded area without tools.
ATTENTION: Do not remove the M4 screw that seals the
opening at the top of the switch.
Figure 10 - Actuate the Escape Release
1
2
3
Step Description
1
5 (0.2)
Actuate the escape release by pushing the red button to the end stop. This action
turns the safety outputs OFF and causes a fault condition.
Reset the escape release by pulling out the red button to the original position. The
actuator can now be removed from the switch.
2
A built-in spring assists with reset of the escape release.
Top View
3
Open the guard door. If the guard door does not open, repeat step 1 and step 2.
IMPORTANT
• The escape release meets the requirements of Cat. B
according to EN ISO 13849.
• The escape release must only be accessible from inside the
safe-guarded area. The installation must not allow access
to the escape release from outside the safe-guarded area.
• A manual functional test of the escape release is required
after installation and after any maintenance or change of
components.
Operation of the escape release causes a fault condition. To reset the switch, cycle
the power or issue a RESET command over the link in a GuardLink safety system.
Rockwell Automation Publication 440G-IN018C-EN-P - September 2021
3
440G-MZ Guardmaster Safety Switches Installation Instructions
Approximate Dimensions
Pin Assignment
Figure 11 - Switch Body — Standard Model [mm (in.)]
Table 2 - 5-pin Micro (M12) (1)
2 x Ø5.5
(0.22)
33
(1.3)
6
(0.24)
45.2
(1.78)
153 (6.02)
134.5 (5.3)
22.6
(0.89)
3
5.9
(0.23)
15 (0.59)
39.5
50
47.5
25.3 (1.97)(1.87)(1.56)
(1)
Ø5.1
(0.2)
134.5 (5.3)
153 (6.02)
182.7 (7.19)
0.3
(0.01)
Figure 12 - Switch Body — Escape Release Model [mm (in.)]
25.7
(1.01)
1
14.9 (0.59)
176.8 (6.96)
15
33 (1.3) (0.59)
(1)
111.1 (4.37)
2 x 32 (1.26)
4
Function
Pin
Color
1
Brown
+24V
+24V
2
White
Safety A
Safety In
OSSD Mode
GuardLink Mode
3
Blue
0V
0V
4
Black
Safety B
Safety Out
5
Gray
Lock Command
Command, Lock, and
Unlock (CLU)
The recommended cordset is Cat. No. 889D-F5AC-2 (2 m [6.5 ft]). For additional lengths, replace the 2
with 5 [5 m (16.4 ft)] or 10 [10 m (32.8 ft)] for standard cable lengths.
The recommended patchcord for use with ArmorBlock® Guard Safety I/O is the 2 m (6.5 ft) Cat. No.
889D-F5NCDM-2. Replace the 2 with 0M3 [0M3 (0.98 ft)], 1 [1 m (3.28 ft)], 5 [5 m (16.4 ft)], or 10 [10 m
(32.8 ft)] for standard cable lengths.
Connection in a GuardLink System
Ø31
(1.22)
2x
32 (1.26)
45.2 (1.78)
2
5
22.5
(0.89)
The 440G-MZ safety switch can be connected to a GuardLink system via a passive
tap (catalog number 440S-PF5D shown in Figure 14) or a passive power tap (catalog
number 440S-PF5D4).
Ø20
(0.79)
Figure 14 - Connect 440G-MZ Switch to a GuardLink System with a Passive Tap
3.2 (0.13) REF
53.1
(2.09)
68.3
(2.69)
440G-MZ
46.6 (1.83)
60.6 (2.39)
79.6 (3.13)
4x
12.8 (0.5)
5-wire Patchcord (1), (2)
889D-F5NCDM-x
+24V DC
Brown
Cordset (3)
889D-F4NE-y
0V Blue
White (S12) Black (S22)
197.1
(7.76)
440S-PF5D
4-wire Patchcord (2), (4)
889D-F4NEDM-x
440R-ENETR
440R-DG2R2T
Figure 13 - Actuator [mm (in.)]
65 (2.56)
15
(0.59)
14
(0.55)
Ø32.9 (1.3)
10
7.3 (0.28) (0.39) 14
(0.55)
25.6 (1.01)
30
(1.18)
20
12.8 (0.5) (0.79) 10
(0.39)
7.5
Ø12.4
(0.3)
(0.49)
30
(1.18)
6 x Ø6.3 (0.25)
4 x Ø6.5
(0.26)
50 (1.97)
32.5
(1.28)
40
(1.57)
23.7
(0.93)
4
(0.16)
9.9
(0.39)
23.8
(0.94)
3 (0.12)
Unlock
Reset
(1)
(2)
(3)
(4)
OSSD
10 m (32.8 ft) length, maximum
Replace x with 0M3 (300 mm [0.98 ft]), 0M6 (600 mm [1.97 ft]), 1 (1 m [3.3 ft]), 2 (2 m [6.6 ft]),
5 (5 m [16.4 ft]), or 10 (10 m [32.8 ft]) for standard cable lengths.
Replace y in order number with 2 (2 m [6.6 ft]), 5 (5 m [16.4 ft]), 10 (10 m [32.8 ft]), 15 (15 m [49.2 ft]),
20 (20 m [65.6 ft]), or 30 (30 m [98.4 ft]) for standard cable lengths.
30 m (98.4 ft) length, maximum
59.3
(2.33)
12.5
(0.49)
4
Rockwell Automation Publication 440G-IN018C-EN-P - September 2021
440G-MZ Guardmaster Safety Switches Installation Instructions
Specifications
Attribute
Standards
Safety classification
Environmental
Value
Attribute
Value
IEC 60947-5-3, IEC 61508, ISO 13849-1, IEC 62061, ISO 14119, UL 508
Operating temperature
0…55 °C (32…131 °F)
Type 4 interlocking device with guard locking per ISO 14119 with
low (standard) and high (unique) coding per ISO 14119
Suitable for use in applications up to and including PLe Cat 4 per
ISO 13849-1, SIL CL 3 per IEC 62061, and SIL 3 per IEC 61508.
Storage temperature
-25…+75 °C (-13…+167 °F)
Operating humidity
5…95%, noncondensing
Enclosure ingress rating
•
•
•
•
•
Shock and vibration
• IEC 60068-2-27, 30 g (1.1 oz), 11 ms
• IEC 60068-2-6, 10…55 Hz, 1 mm (0.4 in.)
Radio frequency/EMC
IEC 60947-5-3, FCC-1 (Parts 18 and 15), RED
OSSD mode (1)
• Proof test interval = 20 years
• PFHd = 3.17E-09
• PFD = 3.67E-04
GuardLink® mode(2)
• Proof test interval = 20 years
• PFHd = 2.93E-09
• PFD = 3.59E-04
Functional safety data
Certifications
(1)
(2)
CE Marked for all applicable EU directives, c-UL-us, TÜV
This data is given for the 440G-MZ safety switch when used in OSSD mode (connected to a safety I/O
or safety logic device).
This data is given for the 440G-MZ safety switch when used in a GuardLink safety system.
General
Attribute
Value
Operating Characteristics
Attribute
Value
Torque for M5 mounting of switch
and actuator mounting bracket
2 N•m (17.7 lb•in) max
Torque, auxiliary release access
screw (escape release model)
0.56 N•m (5 lb•in)
Locking bolt alignment tolerance
X, Y, Z
±5 mm (0.2 in.) max
Door radius, min
457.2 mm (18 in.)
Holding force Fmax
(ISO 14119)
3250 N
Holding force Fzh
(ISO 14119)
2500 N
IP65
IP66
IP67
IP69
IP69K
Switch
• Housing: ABS
• Front brace and escape release:
SS304 (machined), SS316 (cast)
Actuator
•
•
•
•
•
Brackets
High-strength low alloy steel
Accessories
• Padlock: SS410
• Button: Aluminum, powder painted
• Auxiliary release tool: SS304 with
SS201 key ring
• Screw: Steel
Materials
Output current, max (each output)
200 mA
Quiescent power consumption,
locked or unlocked
1.5 W
Lock signal current
1 mA
Peak current and duration, at turn
on or after lock/unlock operation
150 mA for approximately 800 ms following lock/unlock operation
Steady state current, max
• OSSD mode: 40 mA
• GL mode: 50 mA
Housing and housing cover: SS304
Spring: SS302
Grommet: nitrile rubber
Screws: stainless steel
Tongue: SS410
Weight [kg (lb)]
•
•
•
•
•
•
•
•
•
Switch: 0.75 (1.7)
Switch with escape release: 1.59 (3.5)
Actuator: 0.27 (0.6)
Actuator L mounting bracket: 0.27 (0.6)
Actuator Z bracket: 0.54 (1.2)
Switch L bracket: 1 (2.2)
Button: 0.025 (0.06)
Auxiliary release tool: 0.018 (0.04)
Screw: 0.014 (0.03)
Protection Type
•
•
•
•
•
•
Short-circuit
Current limitation
Overload
Reverse polarity
Overvoltage (up to 60V max)
Thermal shutdown/restart
Operating voltage Ue
24V DC +10% / -15% Class 2 PELV
Operating cycle frequency, max
0.2 Hz
Dwell time between subsequent
locking/unlocking
2.5 s
Status Indicators
Response time (Off)
(IEC 60947-5-3)
275 ms
Table 3 - Output Status and Light-emitting Diode (LED) Indication
Start-up time (availability)
8s
Utilization category
(IEC 60947-5-2)
DC-13 24V 200 mA
Insulation voltage Ui
(IEC 60947-5-1)
75V
Impulse withstand voltage Uimp
(IEC 60947-5-1)
Output Status
OSSD Guardlink
Mode
Mode
(Safety A (Safety
and B)
Out)
Guard
Lock
Status Command
Lock
Status
Device
Indicator (1)
1 kV
Open or
Closed
Unlock
Unlocked
Steady red
Off
Off
Safe
Pollution degree
(IEC 60947-5-1)
3
Open
Lock
Unlocked
Flashing
amber
Off
Off
Ready. Close guard
door to lock.
Auxiliary release
Built in
Escape release
Built-in (select models)
Closed
Lock
Locked
Steady
green
On
On
Operational
Protection class
(IEC 61140)
Class II
Mechanical life
500,000 cycles
Open or
Closed
Lock or
Unlock
Locked or Flashing red
Unlocked
Off
Fault present. Cycle
power or issue a
RESET command
over the link in a
Guardlink system (2)
Outputs (Guard door is closed and locked)
(1)
Attribute
Value
Safety outputs
2 x PNP, 0.2 A max / ON (+24V DC)
(2)
Off
State
The LINK status indicator is OFF in OSSD mode, and conditional on the status of other devices in
Guardlink mode. See publication 440R-UM015 in Additional Resources on page 6 for information about
the operation of a GuardLink safety system.
See publication 440G-UM004 in Additional Resources on page 6 for more information about
diagnostic and fault codes.
Rockwell Automation Publication 440G-IN018C-EN-P - September 2021
5
Lock Command
Accessories
Table 4 - Lock Command Function (OSSD mode)
Lock Type
OSSD Mode
Cat. No.
Power to Release
24V = Unlock
0V = Lock
440G-MZS20*NR*
Power to Lock
0V = Unlock
24V = Lock
440G-MZS20*NL*
IMPORTANT
Description
Cat. No.
Standard code actuator (Low level to EN ISO 14119)
440G-MZAS
Unique code actuator (High level to EN ISO 14119)
440G-MZAU
20
S
N
R
J
E
a
b
c
d
e
f
a
b
c
Outputs (Safety/Auxiliary)
Actuator Code
Auxiliary Type
Code
Description
Code
Description
Code
Description
20
Two safety/no aux
S
Standard code
N
No auxiliary
U
Unique code
d
e
f
Lock Type
Connection Type
Special Features
Code
Description
Code
Description
Code
Description
R
Power to Release
J
M12 5-pin
Blank
None
L
Power to Lock
E
Escape release
440G-MZAM1
Z-shaped
440G-MZAM2
Actuator mounting
bracket
In Guardlink mode, LOCK and UNLOCK commands are sent
via the GuardLink CLU signal. This function is the same
for both Power to Release and Power to Lock models.
Catalog Number Explanation
440G-MZS
L-shaped
Switch mounting bracket
440G-MZAM3
Padlock accessory
440G-MZAL
Auxiliary release tool
440G-MZAT
Replacement screw
440G-MZRSC
Replacement button
440G-MZRBU
Additional Resources
To download publications, visit rok.auto/literature and search for the following
publication numbers.
Resource
Description
440G-MZ Guard Locking Switch User Manual,
publication 440G-UM004
Provides general guidelines to install a
Rockwell Automation® guard locking switch.
Guardmaster DG Safety Relay and GuardLink Provides guidelines to configure a Rockwell
System User Manual, publication 440R-UM015 Automation Guardlink safety system.
Industrial Automation Wiring and Grounding
Guidelines, publication 1770-4.1
Provides general guidelines to install a
Rockwell Automation industrial system.
Product Certifications website:
rok.auto/certifications
Provides declarations of conformity,
certificates, and other certification details.
Waste Electrical and Electronic Equipment (WEEE)
At the end of life, this equipment should be collected separately from any unsorted municipal waste.
Rockwell Automation maintains current product environmental compliance information on its website at rok.auto/pec.
Your comments help us serve your documentation needs better. If you have any suggestions on how to improve our content, complete the form at rok.auto/docfeedback.
For technical support, visit rok.auto/support.
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Allen-Bradley, ArmorBlock, expanding human possibility, GuardLink, Guardmaster, Rockwell Automation, and SensaGuard are trademarks of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.
Publication 440G-IN018C-EN-P - September 2021 | Supersedes Publication 440G-IN018B-EN-P - April 2020
Copyright © 2021 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A.
*PN-539600*
PN-539600
PN-539600
10005220453 Ver 02
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