Ten independently-controlled SPDT relays with dry contacts allow program control of circuits or control elements associated with the unit under test. Issue Macro or JavaScript commands to close or open a relay coil, then perform the desired test. Alternatively, you may close different circuits depending on the outcome of a test. For example, illuminate a bin where a failed cable should be placed, or illuminate different bins to show locations for devices sorted by resistance or resistance tolerance. Use a relay to trigger a visual or audible signal indicating the end of a batch, or for a marking device to emboss test results on the wire or connector body.
The relay board includes a small cable that connects the board to the Remote Control socket on the back of the machine; this provides power and control signals from the tester. The board uses no test points. Nonetheless, it can be attached to either Bank 1 or Bank 2 by plugging directly into the control module's 64-pin header. Special brackets allow a standard CB board to be mounted above the relay board/s to operate in the normal manner using all 64 pins in that bank position (see drawing below). Relay boards can be stacked in all but the M2U.
For HVX-series testers, attach the CB35 to a riser board (Item 755A) or set elsewhere on the bench. The CB35 must be used in this detached mode when test voltages exceed 250 V.
Each relay coil has an associated LED lamp which turns on when the coil activates. This helps when debugging Macros during setup and test of the manufacturing procedure. The terminal block provides three output terminals for each relay: Common, Normally Open, and Normally Closed. The jumper configuration on the board lets you leave all relay common terminals floating, tie the common terminals together linked to an external common, or tie the common terminals to the local signal ground.
