Manual 26166V1 MicroNet Simplex & MicroNet Plus
Woodward 95
Discrete Inputs
If a discrete input is not functioning properly, verify the following:
1. Measure the input voltage on the terminal block. It should be in the range of 16–32 Vdc for the low
voltage FTM.
2. Check the wiring. If the inputs are reading open, look for a loose connection on the terminal blocks,
disconnected or misconnected cables, or a missing jumper on the terminal block.
3. Check the application software configuration to ensure that the input is configured properly.
4. After verifying all of the above, exchange the J1 and J2 cables. If the problem moves to a different
channel, replace the cable. If not, replace the 48/24 Discrete Combo module.
5. If the readings are incorrect on several channels of the 48/24 Discrete Combo module,
corresponding to both cables, replace the 48/24 Discrete Combo module.
6. If replacing the module does not fix the problem, replace the FTM. See the instructions in Chapter
15, Installation, for replacing the FTM.
Discrete Outputs
If a discrete output is not functioning properly, verify the following:
1. Check the wiring for a loose connection on the terminal blocks, or disconnected or misconnected
cables.
2. Verify that the current through the relay contacts is not greater than the relay contact rating.
3. Check the software configuration to ensure that the output is configured properly.
4. After verifying all of the above, exchange the J1 and J2 cables. If the problem moves to a different
channel, replace the cable. If not, exchange the cables at the FTM, so J1 is driving J2 and vice
versa. If the problem moves to a different relay, replace the 48/24 Discrete Combo module. If the
fault stays with the same relay, replace the relay or the relay module. See instructions for replacing
the relay modules in Chapter 15. If replacing the relay module does not fix the problem, replace the
cable between the relay module and the FTM, or replace the FTM itself. See the instructions in
Chapters 15 for replacing the FTM.
8.3—48/24 Discrete Combo Module (HDD)
Module Obsolete. See Volume 3, Section 4 for information.
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