Allen-Bradley GS2 Non contact switch Datasheet

Interlock Switches
Non contact Switches
Ferrogard GS1 & GS2
Specifications
Standards
EN954-1, ISO13849-1, IEC/EN60204-1,
NFPA79, EN1088, ISO14119,
ANSI B11.19, AS4024.1
Category
Cat. 1 Device per EN954-1
Dual channel interlocks suitable for Cat.
3 or 4 systems
Approvals
GS1 and GS2 CE marked for all applicable directives
and cULus
GS2 Ex EExd IIC T6 Baseefa
Operating Distance – Make
GS1
GS2 12mm (0.47in)
15mm (0.59in)
Description
The Ferrogard range of magnetically actuated safety switches offers
Non contact reliability together with tolerance to misalignment.
They are designed to be installed so that when a guard door is
opened, the action of the magnetic actuator being removed from the
switch opens the N.C. safety contacts which are intended for the
isolation of control power to a machine primary control element.
The GS1 and GS2 are designed for heavy duty applications. The
GS1 is housed in a stainless steel or brass housing. The GS2 offers the
same characteristic as the GS1, but in an Ex housing for hazardous
locations.
Unlike some magnetic switches the Ferrogards have protected safety
contacts to help ensure that they do not fail to danger.
All Ferrogards have internal non-resettable overload protection on
the safety contact. They should be protected by an external fuse
rated as shown in the specifications table.
See the Explosion Proof section on page 16-1 for more
information on the EX version of the Ferrogard GS2.
Operating Distance – Break
GS1
GS2 23mm (0.91in)
26mm (1.02in)
Closing Time
3.0ms
Dropout Time
2.1ms
Bounce Time
0.7ms
Initial Contact Resistance
15mW
Initial Capacitance, Terminal
to Terminal
0.65pF
Initial Insulation Resistance,
Terminal to Terminal
1 x 106 Ω
Safety Contact Switching
Capability
250V AC 2A max
Safety Contact External
Fusing
< 1.6A quick blow
Min Initial Breakdown
Voltage
600V AC
Operating Temperature
-25°C to +125°C (-13° to +257°F)
Enclosure Protection
IP68 (NEMA 6P)
Cable
GS1 Brass 0.75 mm2 (18AWG) 2 wire
Grey PVC Jacket OD 6mm (0.24in)
Stainless Steel
0.75 mm2 (18AWG) 2 wire
Jacket OD 7mm (0.28in)
GS2 White PVC
1.34 mm2 (16AWG) 2 wire Braided
Polyolefin Jacket OD 8.4.mm (0.32in)
Features
•
•
•
•
•
Non contact actuation
High tolerance to misalignment
High switching current (2A AC)
Metal housings (IP 68)
Ex version available
Case Material
Stainless Steel or Brass
Mounting
Any Position
M3 mounting security screws included.
Weight (not including cable)
GS1 Brass
GS1 Steel 381g (0.84lbs)
Actuator 388g (0.86lbs)
116g (0.26lbs)
3-52
Electrical Life
1 X 106 at rated load
Mechanical Life
10 X 106
Vibration
15g, 20 to 1000Hz
Shock
50g
Ex Version
See Explosion Proof Section
Interlock Switches
Non contact Switches
Ferrogard GS1 & GS2
Product Selection
Safety Contact
Switching Capability
Auxiliary
Contacts
Safety Contacts
Connection
Housing
Catalogue
Number
Type
Brass
2m Cable
250V AC, 2A
1 N.C.
440N-G02048
GS 1
Stainless Steel
None
Brass
3m Cable
440N-G02049
440N-H02046
GS 2 Ex
Stainless Steel
440N-H02047
Note: Contacts are described with the guard door closed, that is, actuator in place. Switch is shipped complete with Actuator.
Accessories
Description
Used with
Page Number
Catalogue Number
Actuator, Alnico
Brass Switch
—
440N-A02056
Actuator, Epoxy-painted
Stainless Steel
—
440N-A02057
Approximate Dimensions—mm (inches)
Dimensions are not intended to be used for installation purposes.
GS1 Switch
GS1 & GS2 Actuator
GS2 Switch
19
(0.75)
13
(0.51)
60 (2.36)
25
(0.98)
16
(0.63)
127 (5)
17
(0.67)
30 (1.18)
6.5 19
(0.26)(0.75)
67 (2.64)
33.5
(1.32)
114.5 (4.51)
46 (1.81)
54 (2.13)
11 (0.43)
6.5
22
(0.87) (0.26)
54 (2.13)
12 (0.47)
7
(0.28)
20
(0.79)
Typical Wiring Diagrams
QD
Cable
Brown
Blue
Safety
N.C.
Fuse
Externally
Safety
N.C.
Fuse
Externally
Note: Unit must be to a grounded to a grounded metal frame or grounded via the field wiring per NEC requirements.
Application Details
See page 3-54 for operating principles and mounting examples.
3-53
Interlock Switches
Non contact Switches
Ferrogard Applications
Application Details
Operating Principle
Encapsulated in the Ferrogard is a unique high power industrial reed,
capable of switching up to 15A. The need switch is de-rated by a
non resettable overload protection fuse. On presenting the actuator
to the switch, the high intensity magnetic field from the actuator
causes the contacts to close. On removing the actuator (opening
the door), the safety contacts open.
Mounting Example 1
Door Closed, Machine RUN
Door Opened, Machine STOP, Door Covering Switch
2mm
No access to switch thus
preventing attempts to defeat
the interlock.
Sliding Door
Sliding Door
Note: Whenever possible, the units should be mounted so that no access can be obtained to the switch when the guard door is open, thus preventing
attempts to defeat the safety system.
Mounting Example 2
Min 50mm
2mm
✔
✘
Switch
Switch
Actuator
Actuator
Door 1
Door 2
It is advisable, where possible, to mount the switch and
actuator on nonferrous materials otherwise it may effect the
operating distances. If mounting on ferrous material, use of a
5mm plastic spacer is recommended.
3-54
Interlock Switches
Non contact Switches
Ferrogard Applications
Application Details
Note: Under the requirements of the Machinery Directive all machinery must undergo risk
assessment to determine the necessary level (or category) of the safety related control system or
hazard avoidance measures. While the Ferrogard complies with the requirements of EN1088 it may
not be suitable for all types of machinery or environments. Where magnetic materials are present
or if it is foreseeable that through machine function or use. Ferrogard operation by magnates other
than the supplied actuator is possible, then use of an alternative Allen-Bradley Guardmaster switch is
recommended. Other Non contact options include: Ferrocode (which utilizes additional coding
techniques preventing them from being overridden by simple means). Alternatively additional
measures may be taken to prevent the Ferrogard being easily bypassed. Consideration should be
given to the recommended installation example given in the instructions and those in EN1088.
✔
✔
✘
Typical Applications
Sliding Guard
Removable Guard
Hinged Guard
Note: Removable guards using Non contact
switches may require two switches, one at either
side of the guard, or the use of a flap to prevent
initial lifting of the non-interlocked edge.
3-55
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