Connecting The Interlock Contact (Optional); Connecting Interlock Input Contacts (Optional); Figure 2-5 Hand Held Receptacle Pins; Table 2-2. Handheld Remote Control Connector Pin-Out - Will Burt Night Scan Chief Installation, Operation & Maintenance Manual

HHRC Pin
A
B
C
D

2.7 CONNECTING THE INTERLOCK CONTACT (OPTIONAL)

The Chief provides an interlock relay contact output to enhance integration into vehicle safety circuitry. This
relay output is from a bi-stable (latching) relay whose contacts close when the unit has completely stowed.
This type of scenario gives the best failsafe condition in the event of a broken wire. Its state is not affected by
whether or not there is power to the mast. This isolated contact is capable of carrying up to 2 amperes and is
available on pins J4-8 and 9. Please refer to the schematics in section 4.4. Its usage is at the discretion of the
integrator. It can be used in conjunction with a customer-supplied relay to drive a flashing warning light. (refer
to Figure 2-6)

2.8 CONNECTING INTERLOCK INPUT CONTACTS (OPTIONAL)

Some customers may require preventing operation of the Chief unless other conditions are first met. An
example might be having the parking brake set. This can be accomplished by inserting an isolated contact in
series with the stop circuit of the Push/Pull switch. Inserting these contacts between the violet wire connected
to pin J4-6 base circuit board and the KA-1 contact of the Push/Pull switch breaks continuity and thus will
immediately stop operation of the Chief and prevent further operation until continuity is restored through the
contacts. Please refer to the schematics in section 4.4.
Revision 1

Table 2-2. Handheld Remote Control Connector Pin-out

To Pin of DC Power
Pin Function
+ Signal
+ Power
- Power
- Signal
Figure 2-5
Connector
C
A
B
D
Hand Held Receptacle Pins
Night Scan Chief
Recommended Wire Ga.
20
20
20
20
2-5