When the SNAP-IDC-HDB breakout rack is used with the SNAP-HD-BF6 cable to connect to the SNAP-IDC-32 module, all input channel LEDs are turned on, even though field signals are not present.
When the SNAP-ODC-HDB breakout rack is used with the same cable and a SNAP-ODC-32-SRC or SNAP-ODC-32-SNK module, the corresponding output point LEDs do not turn on when a point is turned on.
If you are having the above symptoms, jumper the board according to the following:
SNAP-IDC-HDB: Install the JPA, JPB, JPC, and JPD jumpers as shown:
SNAP-ODC-HDB: Install the jumpers as shown below:
Several of the breakout rack MC+ and FC+ jumper labels are incorrectly silkscreened (white printing on the circuit board).
For clarity, future revisions of these boards will be silkscreened with X and Z, instead of MC+ and FC+. Refer to product documentation for the correct jumper positions.