I have seen what Capacitors and resistors connected to ice cube relays. I was told it was to prevent damage to the PLC because of the reverse voltage spike that can occur when a coil de-energizes and the magnetic field collapses. I have 24VDC timer that which the coil will be energized by a Allen Bradley Photo Sensor. The output contacts will be going to a light stack. Al 24VDC.
Does the timer need to be shunted?