Ten independently-controlled SPDT relays with dry contacts allow program control of circuits or control elements associated with the unit under test. Issue Macro 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 mounts in either Bank 1 or Bank 2, but uses none of the test points on that bank. Instead, special brackets allow a standard CB board to be mounted above the relay board to operate in the normal manner using all 64 pins in that bank position (see drawing on right). 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.
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.
The screw terminal blocks accept bare wires from 12- to 30-gauge in size. We normally include the terminal blocks soldered in place and ready to use. These terminal blocks have 5 mm (0.197") spacing between the contacts. The board may also be supplied without terminals for special customer-mounted connectors (order Item 735A).
The relay board is sold as a single board, not a board set. Each board includes a control cable that links to an M3U tester. Up to two relay boards may be used on a CableEye tester if desired to provide a total of 20 circuits. The relays operate at +5v and derive power from the tester. Independent Power and Ready LEDs show the status of the board.
Contact Load: 0.5 A at 125 vAC, 1 A at 24 vDC
Contact Resistance: 100 mΩ max.
Bounce Time: 0.2ms (operate), 5ms (release)
Insulation Resistance: 1000 MΩ min.