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Switch operational description
MKey5 Interlock switches are designed to provide position
interlock detection for moving guards. They are designed to fit
the leading edge of sliding, hinged or lift off machine guards.
The actuator is fitted to the moving part of the guard and is
aligned to the switch entry aperture.
The head can be rotated to provide four given actuator entry
positions. When the actuator is inserted into the switch the
safety contacts close and allow the machine start circuit to
be enabled. MKey5 has two versions regarding holding force,
12N and 40N. MKey5 has several types of actuators as an op-
tion. A standard actuator key is always delivered with interlock
switches.
Material
Depending on the environment where the switch will be used,
different material can be chosen on the Mkey5. The basic
version is in a full plastic body (polyester) and in cases where
the demands are higher on the interlock switch head, there is
a version with a plastic body and with a stainless steel head.
Both these types give the MKey5 interlock switch a rating of
IP67.
In harsh applications as for food processing and chemical
industry there is a MKey5Z Interlock switch with a total rugged
stainless steel 316 body. This version has IP69K enclosure
protection (maintained by a double seal lid gasket) and can be
high pressure hosed with detergent at high temperature.
Positive forced disconnected contacts
A positive forced contact provides a forced disconnect of the
safety contacts at the withdrawal of the actuator. The design
of the MKey5 ensures that the contacts will not fail or be held
in a normally closed position, due to failure of the spring me-
chanism or that welding/sticking of the contacts can occur.
Safety level
The positive forced disconnect contacts gives a high safety
level and the interlock switch has an anti-tamper mechanism.
By combining the MKey5 with one of our suitable safety
control module, for example a safety relay from the RT-series,
Pluto safety-PLC or Vital module, the requirements for both
hatch and gate switch supervision can be fulfilled. To obtain
the highest level of safety, two switches per gate are required.
Explosion Proof version (X)
MKey5 also exist in versions with certified explosion proof
contact block (X-versions). MKey5ZX is in stainless steel and
can be used in European Zone 1, 2, 21,22 enviroments (Gas
and Dust). Preassembled with 3meter cable.
Regulations and Standards
The MKey5 is designed and approved in accordance to
relevant standards. Examples of relevant standards are
EN1088, IEC/EN60947-5-1, EN60204-1, ENISO13849-1,
EN62061 and UL508.
Safety Interlock Switch
MKey5 Approvals:
Application:
– Gates
– Hatches
Features:
– 2NC + 1NO (actuator in)
– 4 actuating positions
– Holding force 12 or 40N
– Up to PL e/Cat.4
– Plastic, Plastic with stainless
steel head or stainless steel
(X-versions)
TÜV
Rheinland
ABB Safety Handbook | 2TLC172001C0202 9/34
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Actuator
1.Standard Key for plastic head 2TLA050040R0201
2.Standard Key for SS head 2TLA050040R0202
3. Flat Key 2TLA050040R0220
4.Flexible Key with plastic housing 2TLA050040R0221
5.Flexible Key with metal housing 2TLA050040R0203
6.Flexible Key with SS housing 2TLA050040R0204
(Key always in Stainless steel)
Contact block configurati-
on 2NC, 1NO
Contacts at withdrawal of actuator
For all MKey the normally closed (NC) circuits are closed
when the guard is closed (actuators inserted).
Dimension MKey5Z
Dimension MKey5
11/12 Open
21/22 Open
33/44 Open
6.80 60mm
2NC 1NC
16
4
3
25
Technical data – MKey5 series
Article number
Standard
MKey5 - 12N
Mkey5+ - 40N
Stainless steel head
MKey5 - 12N
MKey5+ - 40N
Full stainless steel
MKey5Z - 12N
MKey5+Z - 40N
MKey5ZX (EX)
2TLA050003R0100
2TLA050003R0101
2TLA050003R0110
2T L A0 50 00 3R 0111
2TLA050003R0120
2TLA050003R0121
2TLA050003R0125
Level of safety
ENISO 13849-1
EN 62061
Up to PL e/Cat. 4 depending upon
system architecture
Up to SIL3 depending upon system
architecture
Safety data
Mechanical reliability B10d
Proof test interval (life)
MTTFd
2.5 x 106 operations at 100mA load
35 years
356 years (8 cycles per hour/24
hours per day/365 days)
Utilisation category AC15 A300 3A
Force/travel for
positive opening
6 mm
Acuator entry mini. radius 175 mm Standard Key
100 mm Flexible Key
Max. approached/withdrawal
speed
600 mm/s
Actuator Stainless steel
Mechanical life 1 million switch operations
Rated insulation/withstand voltage 500VAC/2500VAC
Vibration resistance IEC 68-2-6, 10-55Hz+1Hz,
excursion: 0.35 mm,
1 octave/min
Contacts
(actuator key inserted)
2NC + 1NO
(NC are direct opening action)
Thermal current (lth) 10A
Enclosure protection
MKey5
MKey5Z(X)
IP67
IP69K and IP67
Operating temperature -25°C to +80°C
Conduit entries 3xM20
Material
MKey5
MKey5Z(X)
Polyester or/and stainless steel 316
Stainless steel 316
Colour Red or stainless steel
Mounting position Any
Mounting bolts Body 2 x M5, actuator 2 x M5
Explosion Proof version (X)
Classification
Rated Voltage
Rated Current
Ex d IIC T6
(-20°C ≤ Ta ≤ +60°C) Gb
Ex tb IIIC T85°C
(-20°C ≤ Ta ≤ +60°C) Db
250V AC/DC
2 pole 4A
4 pole 2.5A