IS-MDC-12 Instruction Manual
CEB00249-53-000
Page 8 of 12
Issue 3 19 January 2021
5.1 Testing Using a Multimeter
The contact can be tested for correct operation using a multimeter before it is wired to the interlock
panel. To do this set the meter to the continuity buzzer mode and check that it bleeps when the
probes are touched together.
Next attach one probe to the red wire of the door contact and the other to the blue wire. When the
door is closed the buzzer should sound. Repeat for the black and white wires.
Lastly check the green and yellow wires. With these wires the buzzer should only sound when the
door is open. Check that all three pairs of contacts work correctly under all conditions of door
movement. For example, with the door held shut by its catch or lock, check that the contacts work
as above without interruption when the door is pushed against the jamb and pulled against its lock.
5.2 Electrical Connections
Lead Core Colours
In this manual a ‘normally closed’ contact is one which is made when the door is closed, and a
‘normally open’ contact is made when the door is open.
Red-Blue
Normally Closed Contact 1
White-Black
Normally Closed Contact 2
Yellow-Green Normally Open Contact
Contact Rating
All three contacts in the switch are isolated from each other and rated at 50V 300mA resistive load.
On no account must mains/line voltage be applied to this product.
The load current should never exceed 300mA and the switch has internal overcurrent protection
which will disable it permanently should this current be exceeded. If this happens the switch should
be replaced. The switch should never be opened. This will invalidate the warranty and there are no
serviceable parts inside.
All Lasermet ICS panels comply with this requirement.
Wiring to a Lasermet ICS Interlock Control Panel
ICS-6
Select an unused Interlock connector J1-J4.
Connect the red wire to an A terminal.
Connect the white wire to a B terminal.
Connect the black wire to the other B terminal.
Connect the blue wire to the other A terminal.
The green and yellow wires are not used on the ICS-6.
