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C00540 Date: 28.11.2022

C/Order: 32100

Issue: 40

C00540

Component Specification – M80 & M83 Series Rectangular Connectors

APPENDIX 4 – TEST FOR LATCH INTEGRITY ON L-TEK

When an unloaded female connector moulding is mated with a latched male connector, and a force of 20N is

applied for 10 seconds in the directions shown, there shall be no failure of any part of the latch mechanism.

B

A

B

A

APPENDIX 5 – INSTRUCTIONS FOR THE USE OF CONNECTORS FITTED WITH

JACKSCREWS

Connectors are fitted with jackscrews where it is considered necessary to provide mechanical assistance in

ensuring a satisfactory engagement and separation of the connector. This may apply in cases where

engagement and separation forces are so high as to prevent satisfactory hand engagement, or where access

to connector is restricted. Jackscrews also provide a locking feature, preventing the connector from

disengaging under adverse conditions.

To obtain maximum effectiveness from the jackscrew system, the following rules for their use should be

observed.

1)

The connector with board mount jackscrews should be fixed to the PCB with fixings and tightened to

a torque of 21±2cmN.

Board mount fixings must be fitted before Wave soldering.

Board mount fixings can be fitted before or after reflow soldering, as preferred by customer. If fitted

before soldering, check that the fixings remain tight after soldering.

NOTE: Care must be taken when aligning male and female threads, to avoid cross-threading and

possible failure of parts.

On engaging the two halves of the connector after ensuring correct polarity, lightly push home the

floating half until the jackscrews touch. Then, maintaining the pressure, turn one of the floating

jackscrews clockwise, until it engages with the fixed screw. Repeat with the other screw.

Then screw in each jackscrew, ensuring even loading by applying a maximum of one turn to each

screw in sequence until the connector is bottomed. This will be evident by a sudden increase in the

torque required on the screw. This torque should not exceed 23cmN.

Finger pressure exerted at the centre of the connectors may be required to achieve full engagement

of both halves.

NOTE: Care must be taken when aligning male and female threads to avoid cross-threading and

possible failure of parts.

3)

On disengaging the two halves of the connector turn each of the floating jackscrews anti clockwise.

Again, ensure even loading by turning each screw in sequence for a maximum of one turn until the

jackscrew disengage. The connector can then be easily pulled apart.

Female connector

Male connector

Latches engaged