®
Machine Safety Switches
Magnet Style
Printed in USA 10/02 P/N 49376 rev. B
SI-MAG Series Magnetic Style Switch Features
•Non-contact safety switches are the best choice for
washdown applications; the switch components are sealed
and rated NEMA 4X, IEC IP67
•Tolerant of dirt buildup, sensing distance, and alignment
•System consists of three components:
- Coded magnet
- Reed switch sensor
- Controller module
•Magnet contains several differently-polarized magnets, and
sensor contains pole-stable reed contacts to minimize any
possibility of defeat
•Easy installation; can be concealed for added defeat resistance
•Sensor reed switches provide diverse input to the controller
module
3 m
(10 ft)
3 mm
(0.12")
14 mm
(0.55")
4 mm
(0.16")
8 mm
(0.32")
Controller
Sensor
Cable
Switching Distance
Min. ON Max OFF
Magnetic Style Safety Switch Models
7 mm
(0.28" )
8 mm
(0.31")
16 mm
(0.63")
SI-MAG1C
*NOTES: • 9 m (30') cables are available for magnet sensors by adding suffix “W/30” to the model number of the cabled version
(e.g., SI-MAG1SM w/30).
†Cable Opposite
SI-MAG3MM
SI-MAG1MM
SI-MAG2MM
Coded
Magnet
SI-MAG1MMHF
SI-MAG3SM
SI-MAG1SM
SI-MAG1SMCO†
SI-MAG2SM
Magnet
Sensor*
3 mm
(0.12")
Machine Safety Switches – Magnet Style
page 2Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Important Information Regarding the Use of Safety Switches
In the United States, the functions that Banner safety switches are intended to perform are regulated by the Occupational Safety
and Health Administration (OSHA). Whether or not any particular safety switch installation meets all applicable OSHA
requirements depends upon factors that are beyond the control of Banner Engineering Corp. These factors include the details of
how the safety switches are applied, installed, wired, operated, and maintained.
Banner Engineering Corp. has attempted to provide complete application, installation, operation, and maintenance instructions.
This information is found in the instruction manual packaged with each safety switch. In addition, we suggest that any questions
regarding the use or installation of safety switches be directed to the factory applications department at the telephone numbers or
address shown, below.
Banner Engineering Corp. recommends that safety switches be applied according to the guidelines set forth in international
(ISO/IEC) standards listed, below. Specifically, Banner Engineering Corp. recommends application of safety switches in a
configuration which meets safety category 4, per ISO 13849 (EN954-1).
In addition, the user of Banner safety switches has the responsibility to ensure that all local, state, and national laws, rules, codes,
and regulations relating to the use of Banner safety switches in any particular application are satisfied. Extreme care is urged that
all legal requirements have been met and that all installations and maintenance instructions are followed.
U.S. Regulations Applicable to Use of Banner Safety Switches
OSHA Code of Federal Regulations: Title 29, Parts 1900 to 1910
Available from: Superintendent of Documents
Government Printing Office
P. O. Box 371954
Pittsburgh, PA 15250-7954
Tel: 202-512-1800
U.S. Standards Applicable to Use of Banner Safety Switches
ANSI B11 “Standards for Construction, Care, and Use of Machine Tools”
Available from: Safety Director
AMT - The Association for Manufacturing Technology
7901 Westpark Drive
McLean, VA 22102
Tel: 703-893-2900
Applicable European and International Standards
ISO/TR 12100-1 “Safety of Machinery - Basic Concepts, General Principles for Design”
(EN292-18-2)
ISO 13852 (EN 294) “Safety of Machinery - Safety Distances to Prevent Danger Zones Being Reached by the Upper Limbs”
ISO 13853 (EN 811) “Safety of Machinery - Safety Distances to Prevent Danger Zones Being Reached by the Lower Limbs”
ISO 13849 (EN 954-1) “Safety of Machinery - Safety Related Parts of Control Systems”
ISO 13855 (EN 999) “Safety of Machinery - The Positioning of Protective Equipment in Respect to Approach Speeds of Parts of the Human Body”
ISO 14119 (EN 1088) “Safety of Machinery - Interlocking Devices Associated with Guards - Principles for Design and Selection”
IEC/EN 60204-1 “Safety of Machinery - Electrical Equipment of Machines”
IEC/EN 60947-5-1 “Low Voltage Switchgear -Electromechanical Control Circuit Devices”
Available from: Global Engineering Documents
15 Inverness Way East
Englewood, CO 80112-5704
Phone: 1-800-854-7179
Fax: 303-397-2740
!
Application Assistance
Toll Free: 1-888-3-SENSOR (1-888-373-6767)
Email: sensors@bannerengineering.com
Address: 9714 Tenth Avenue North
Minneapolis, MN 55441
Machine Safety Switches – Magnet Style
page 3
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Sensor and Magnet Installation
Magnetic style safety switches are easily mounted on the inside edge of most guards.
Inside mounting can often hide them from view and discourage tampering.
All mounting hardware is supplied by the user. Use of permanent fasteners or locking
hardware is recommended to prevent loosening or displacement of the actuator and
switch body. Mounting holes in the magnet and sensor accept M4 (#6) hardware (see
drawings, on page 8).
Position the magnet and sensor in the mounting location with the magnet surface
directly opposite the sensing surface (see dimension drawings). Leave a slight gap (up
to 3 mm or 0.12") between the magnet and sensor surfaces, so that the magnet and
sensor do not act as an end stop when the guard is closed. Mark the mounting holes.
Fasten the magnet and sensor in place. After the mounting hardware is secure, check
the magnet and sensor alignment and sensing gap. Neither is critical, but the gap
should be less than 3 mm (0.12") for reliable sensor actuation.
Route the sensor cable to the controller location. The controller must be installed
inside an enclosure. It is not designed for exposed wiring. It is the user’s responsibility
to house the controller in an enclosure with NEMA (or IEC) rating which is suitable for
the operating environment. The controller mounts onto standard 35 mm DIN rail.
Note: The typical direction of approach of a magnet to its corresponding sensor is
normally perpendicular to the sensing face and the magnet surface (see dimensional
drawings on page 8 and Figures 2a, 2b and 2c, “Direction of Approach on page 6).
Alternate directions are possible (e.g., sideways or parallel), though the speed of
approach must be fast enough to meet the simultaneity-monitoring period of 0.5
seconds. This speed is approximately equal to or greater than 0.2 m (8"/s). If the
simultaneity is not met, the MAG1C controller will not close its safety output contacts,
even if the “sensor” indicator is OFF.
IMPORTANT NOTE: If the sensor or magnet is mounted on a material that can be
magnetized (e.g., ferrous metal, such as iron), the switching distance will be affected.
The sensor and magnet must be mounted a minimum distance of 15 mm (0.6") from
magnetized or ferrous materials for proper operation.
IMPORTANT NOTE: The magnet and sensor are coded to minimize the possibility of
false actuation. Nevertheless, they should not be used within known fields of high-
level electromagnetic radiation. The magnet and sensor must never be used as a
mechanical stop.
Electrical Installation
Each controller is powered by 24V dc (at less than 100 mA). The controller, in turn,
supplies power to the sensor.
As illustrated in Figure 1, the safety output (terminals 71 and 76) from each of two
safety switches per interlock guard must connect to a 2-channel safety module or
safety interface in order to achieve a control reliable interface to the master stop control
elements of a machine. Examples of appropriate safety modules include 2-channel
emergency stop (E-stop) safety modules and gate monitor safety modules.
Two functions of the safety module or safety interface are:
1) to provide a means of monitoring the contacts of both safety switches for contact
failure, and to prevent the machine from restarting if either switch fails;
WARNING!
It must not be possible for
personnel to reach any
hazard point through an
opened guard (or any
opening) before hazardous machine
motion has completely stopped. Please
reference OSHA CFR 1910.217 and ANSI
B11 standards (see page 2) for
information on determining safety
distances and safe opening sizes for
your guarding devices.
!
Machine Safety Switches – Magnet Style
page 4Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
gray
brown
blue
black
Coded Magnet Coded Magnet
71
76
1.1 1.4 81
K2K1
1.2 1.3 80
SI-MAG1C
91
94
61
60
+
-
24V dc
gray
brown
blue
black
71
76
1.1 1.4 81
K2K1
1.2 1.3 80
SI-MAG1C
91
94
61
60
+
-
24V dc
Input
Channel
#1
Input
Channel
#2
2-channel Safety Module
(2-channel E-stop Module
2-channel Gate Monitor Module, etc.)
Single gate or guard
Note:
Note:
The contact between terminals 91 and 94
is a non-safety auxiliary monitor contact which
is open when K1 and K2 are both closed
Note: Blue and Gray wires are interchangeable.
Brown and Black wires are interchangeable.
The contact between terminals 71 and 76 is the
safety rated output. The user must refer to the
SI-MAG1C manual for recommended wiring.
Connect terminal 60 to 61 with a jumper wire.
Magnet
Sensor Magnet
Sensor
IMPORTANT NOTE: Be certain that all wiring conforms to all relevant wiring codes.
Figure 1. Connect two redundant safety switches per interlock guard to an appropriate 2-channel input safety module.
CAUTION! Control Reliability ...
Two safety switches must be used per interlock guard to achieve control reliability of a machine stop circuit. Use
of only one safety switch per interlock guard is not recommended.
In addition, normally-closed safety contacts from each of the two safety switches must be individually connected to the two separate
inputs of a 2-channel safety module or safety interface, as illustrated in Figure 1. This is required to provide monitoring for safety switch
contact failure, and to provide the necessary reset routine, as required by ANSI B11 and NFPA 79 machine safety standards.
!
CAUTION! Connection of Multiple Safety Switches to one Safety Module Input Channel ...
To meet control reliability, never connect more than one safety switch contact to one input channel of a safety
module or safety interface. To do so defeats the ability of the safety module to monitor each contact for failure, and
results in a machine stop control circuit which is not control reliable.
!
NOTE: Refer to the installation
instructions provided with the
safety module for information
regarding the interface of the
safety module to the machine
stop control elements.
Machine Safety Switches – Magnet Style
page 5
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
2) to provide a reset routine after closing the guard and returning the safety contacts
to their closed position - this prevents the controlled machinery from restarting by
simply reinserting the safety switch actuators. This necessary reset function is
required by ANSI B11 and NFPA 79 machine safety standards.
Use only the safety output between terminals 71 and 76 of the MAG1C controllers for
inputs to the safety module or safety interface (see Figure 1). The auxiliary contact
between terminals 91 and 94 is not safety-rated and should only be used for
monitoring functions, such as to communicate with a process controller or PLC. In
normal operation, the output of the auxiliary contact is opposite of the safety output.
Terminals 60 and 61 are External Device Monitoring (EDM) inputs and must be
connected to normally-closed forced-guided monitor contacts of the machine stop
control elements or jumpered if the monitoring of these elements is accomplished by
other means, such as by the safety module or safety interface.
Refer to the installation instructions provided with the safety module for more information
regarding the interfacing of the safety module to the machine stop control elements.
Periodic Checks
We recommend that safety switches be checked at each shift change or machine setup
by a designated person for:
1) Breakage of the sensor or magnet,
2) Good alignment of the magnet with the sensor,
3) Confirmation that the sensor and magnet are not being used as an end stop,
4) Loosening of the sensor or magnet mounting hardware.
5) Verify that it is not possible to reach any hazard point through an opened guard (or
any opening) before hazardous machine motion has completely stopped.
In addition, we recommend that a qualified person check for the following on a periodic
schedule determined by the user based upon the severity of the operating environment
and the frequency of switch actuations:
1) Inspect the electrical wiring for continuity and damage.
2) Check to be certain that wiring conforms to the instructions given on pages 3 and 4
of this installation manual.
A designated person is identified in writing by the employer as being appropriately
trained to perform a specified checkout procedure. A qualified person possesses a
recognized degree or certificate or has extensive knowledge, training, and experience to
be able to solve problems relating to the safety switch installation (ANSI B30.2).
Repairs
NOTE: Do not attempt any repairs to the switch. It contains no field-replaceable
components. Return the switch to the factory for warranty repair or replacement.
If it ever becomes necessary to return a switch to the factory, please do the following:
1) Contact the Banner applications engineering department at the number or address
listed on the front cover. They will attempt to troubleshoot the system from your
description of the problem. If they conclude that a component is defective, they will
issue an RMA (Return Merchandise Authorization) number for your paperwork, and
give you the proper shipping address.
2) Pack the switch carefully. Damage which occurs in shipping is not covered by
warranty.
Machine Safety Switches – Magnet Style
page 6Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Incorrect Direction of Approach
Label to label approach of
sensor and magnet is not possible
Direction of
Movement
Sensing face
Magnet
Normal Direction of Approach
movement is perpendicular to the
plane of the sensing face
Direction of
Movement
Sensor
Incorrect Direction of Approach
90º approach of sensor and magnet
is not possible
Direction of
Movement
Direction of
Movement
Incorrect Direction of Approach
Label to label approach of
sensor and magnet is not
possible
Direction of
Movement
Incorrect Direction of Approach
90º approach of sensor and magnet
is not possible
Alternate Direction of Approach
movement is parallel to the
plane of the sensing face
Direction of
Movement
Magnet
Sensor
Direction of
Movement
Alternate Direction of Approach
movement is parallel to the
plane of the sensing face
Direction of
Movement
Normal Direction of Approach
movement is perpendicular to the
plane of the sensing face
Sensor
Magnet
Direction of
Movement
Alternate Direction of Approach
movement is parallel to the
plane of the sensing face
Important! The magnet mounting holes must be oriented
as shown, relative to the sensor cable position.
Magnet
Sensor
Normal Direction of Approach
movement is perpendicular to the
plane of the sensing face
Direction of
Movement
Magnet
Important! The magnet mounting holes must be oriented
as shown, relative to the sensor cable position.
Sensor
Direction of
Movement
Incorrect Magnet Orientation
Magnet
Sensor
Figure 2a.Direction of Approach for SI-MAG1xx sensor/magnet pairs
“Direction of Approach” options for sensor/magnet pairs
Figure 2b.Direction of Approach for SI-MAG2xx sensor/magnet pairs
Figure 2c. Direction of Approach for
SI-MAG3xx sensor/magnet pairs
NOTE: For all magnet style switches,
approach speed must be greater than
0.2 m/s to allow for proper switching.
Machine Safety Switches – Magnet Style
page 7
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Repeat Switching Accuracy ±0.1 mm (±0.004")
Construction Epoxy-encapsulated circuit in polyamide housing
Environmental Rating IEC IP67
Operating Temperature -5° to +70°C (+23° to +158°F)
Connections Integral PVC-jacketed 3 m (10') 4-wire cable. Cable O.D. is 5 mm (0.2"). Wires are 24 AWG (0.25 mm2).
Switching Elements Three pole-stable reed switches
Output Configuration
Status Indicators Green - Power ON
Red - Sensor/Magnet out of position or open circuit in sensor wiring
Two series-connected (redundant) normally-open safety relay contacts
Contact Material: silver-nickel alloy
Contact Ratings:
Maximum Voltage: 250V ac
Maximum Current: 8A ac
Maximum Power: 1700VA
Mechanical Life: 1,000,000 operations
Electrical Life: 100,000 operations at full resistive load
NOTE: Transient suppression is recommended when switching inductive loads. Install suppressors across
load. Never install suppressors across output contacts
Sensor Compatibility All magnet sensor models listed on page 1
Housing Polycarbonate; Rated NEMA 1, IEC IP20
Auxiliary Non-safety
Monitor Contact
Maximum Voltage: 120V ac, 24V dc
Maximum Current: 0.25A (ac), 1.0 A (dc)
Certifications
Mounting Mounts to standard 35 mm DIN rail track. Must be installed inside an enclosure rated NEMA 3, IEC IP54 or better.
Wire Connections Screw terminals with pressure plates accept wire size:
0.2 mm2(26 AWG) min. to 2.5 mm2(12 AWG) max.
Operating Temperature 0° to +55°C (+32° to +131°F)
Dimensions See drawing on page 8.
Supply Voltage and Current 24V dc ±15% (15% maximum ripple) at less than 100mA
Magnet Style Sensor Specifications
Magnet Style Controller Specifications
Simultaneity - Monitoring
Period
The inputs from the sensor (terminals 1.1/1.2 and 1.3/1.4) must switch within 0.5 seconds of each other
Switching Capacity 30V dc max @0.25W
Machine Safety Switches – Magnet Style
Banner Engineering Corp., 9714 Tenth Ave. No., Minneapolis, MN 55441 • Phone: 763.544.3164 • Toll-free: 888.373.6767 • www.bannerengineering.com
!
WARRANTY: Banner Engineering Corp. warrants its
products to be free from defects for one year. Banner
Engineering Corp. will repair or replace, free of charge,
any product of its manufacture found to be defective at
the time it is returned to the factory during the warranty
period. This warranty does not cover damage or liability
for the improper application of Banner products. This
warranty is in lieu of any other warranty either
expressed or implied.
®
43 mm
(1.7")
22 mm
(0.9")
7 mm
(0.3")
26 mm
(1.0")
ø 8.3 mm
(0.33") (2)
ø 4.3 mm
(0.17") (2)
Sensing
Surface
29 mm
(1.1") 13 mm
(0.5")
4.5 mm
(0.18")
88 mm
(3.5")
78 mm
(3.1")
68 mm
(2.7")
4.5 mm
(0.18") (3)
6.5 mm
(0.26")
25 mm
(1.0")
10.7 mm
(0.42")
7.2 mm
(0.28")
2.5 mm
(0.10")
13 mm
(0.5")
Sensing
Surface
3.0 mm
(0.12")
43 mm
(1.7")
22 mm
(0.9")
7 mm
(0.3")
26 mm
(1.0 in)
ø 8.3 mm
(0.33") (2)
ø 4.3 mm
(0.17") (2)
Magnet
Surface
29 mm
(1.1") 13 mm
(0.5")
4.5 mm
(0.18")
88 mm
(3.5")
78 mm
(3.1")
68 mm
(2.7")
4.5 mm
(0.18") (3)
6.5 mm
(0.26")
25 mm
(1.0")
10.7 mm
(0.42")
7.2 mm
(0.28")
2.5 mm
(0.10")
13 mm
(0.5")
Magnet
Surface
3.0 mm
(0.12")
Figure 3a.SI-MAG1SM Sensor
dimensions
88 mm
(3.5")
78 mm
(3.1")
68 mm
(2.7")
4.5 mm
(0.18") (3)
6.5 mm
(0.26")
25 mm
(1.0")
10.7 mm
(0.42")
7.2 mm
(0.28")
2.5 mm
(0.10")
13 mm
(0.5")
Sensing
Surface
3.0 mm
(0.12")
Figure 3b.SI-MAG1SMCO Sensor
dimensions
Figure 3c. SI-MAG1MM Magnet
dimensions
35 mm
(1.4")
34 mm
(1.3")
2 mm
(0.1")
SW36
5.2 mm
(0.2")
27.5 mm
(1.1")
M30 x 1.5 mm
Sensing
Surface
ø 35 mm
(1.4")
15 mm
(0.6")
9 mm
(0.4")
35 mm
(1.4")
25 mm
(1.0")
4.5 mm
(0.2")
10.5 mm
(0.4")
Magnet
Surface
Figure 5a.SI-MAG3SM Sensor dimensions Figure 5b.SI-MAG3MM Magnet dimensions
Figure 4a.SI-MAG2SM Sensor dimensions Figure 4b.SI-MAG2MM Magnet dimensions
75.0 mm
(2.95")
98.5 mm
(3.88")
22.5 mm
(0.89")
Figure 6. SI-MAG1C Controller dimensions
