Installation Instructions
Original Instructions
MT-GD2 Snap Acting Tongue Interlock Switches
Catalog Numbers 440K-M21ANDH, 440K-M21BNDH, 440K-M21BNDH-N5, 440K-M21MNDH-N5, 440K-M22ABDM, 440K-M22ABDT, 440K-M22AEDT,
440K-M22ANDL, 440K-M22ANDT, 440K-M22ASDM, 440K-M22ASDT, 440K-MT55002, 440K-MT55004, 440K-MT55005, 440K-MT55006, 440K-MT55022,
440K-MT55026, 440K-MT55029, 440K-MT55039, 440K-MT55041, 440K-MT55042, 440K-MT55045, 440K-MT55050, 440K-MT55051, 440K-MT55052,
440K-MT55062, 440K-MT55063, 440K-MT55065, 440K-MT55066, 440K-MT55070, 440K-MT55074, 440K-MT55075, 440K-MT55076, 440K-MT55077,
440K-MT55078, 440K-MT55079, 440K-MT55080, 440K-MT55081, 440K-MT55082, 440K-MT55083, 440K-MT55085, 440K-MT55086, 440K-MT55087,
440K-MT55088, 440K-MT55089, 440K-MT55091, 440K-MT55092, 440K-MT55095, 440K-MT55096, 440K-MT55097, 440K-MT55098, 440K-MT55099,
440K-MT55100, 440K-MT55101, 440K-MT55103, 440K-MT55104, 440K-MT55105
Summary of Changes
Converted multiple language pub to English only.
Installation
Installation of the MT-GD2 Snap Acting Tongue Interlock Switch must
be in accordance with the following steps and stated specifications and
implemented by suitably competent personnel. The unit is not to be
used as a mechanical stop. Guard stops and guides must be mounted.
Adherence to the recommended maintenance instructions forms part of
the warranty.
Table 1 - Specifications
Maintenance
Every week, check the alignment of the actuator to the switch and the
correct operation of the switching circuit. Also check for signs of abuse
or interference. Inspect the switch casing and actuator for damage.
Replace if needed.
At least every six months, isolate all power. Remove the lid and end
cover. Inspect all terminals for tightness. Clean out any accumulation of
fine dirt. Check for any sign of wear of damage, for instance, actuator
wear, cam assembly wear, contact oxidization and replace if needed.
Replace cover and tighten screws to specified settings. Reinstate the
power and check for correct operation. Reapply tamper evident varnish
or similar compound for mountings.
Repair
If there is any malfunction or damage, make no attempts at repair.
Replace before machine operation is allowed. DO NOT DISMANTLE
THE UNIT.
Information in Regard to UL508
The temperature rating of field wiring can’t be less than ambient when
used in elevated ambient zones.
Use copper conductors only. Use polymeric conduit only. End of line
device.
ATTENTION:
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.
WARNING:
Do not defeat, tamper, remove, or bypass this unit.
Severe injury to personnel could result.
Attribute
Value
Safety contacts
2 N.C. direct opening action
Thermal current
10 A
Current
1 mA @ 24V DC for 1 million operations, min
2 A with a FF type fuse for 500,000 operations with a resistive load per
IEC 6094
7-4-1
2 A with a FF type fuse for 500,000 operations with an inductive load per
IEC 6094
7-5-1
Rated insulation voltage
Ui 2500V
Rated impulse withstand
Uimp 2500V
Pollution degree
3
Fuse rating
2 A FF type super quick blow to EN 60127, max
Operating frequency
600 cycles/hr
Auxiliary contacts
2 N.O.
Ingress protection rating
IP67
Operating temperature
-20…+80 °C (-4…+176 °F)
Mechanical life
1,000,000 operations
Torque settings, max
5.0 N•m (44.25 lb•in) mounting bolts
1.6 N•m (14.16 lb•in) lid screws
1.0 N•m (8.85 lb•in) terminal screws
1.6 N•m (14.16 lb•in) head bolts
ATTENTION:
The safety contacts of these products are described
as normally closed (N.C.), for example, with the guard closed,
actuator in place (where relevant), and the machine able to be
started.
Attribute
Value