The Relay Output Board (TCRA), contain up to 30 relays, K1 through K30. There are two of these boards in the each of the digital I/O cores. These relays are used to operate the gas manifold blow off valves in some applications. The other three boards contain the full 30 relays. The first 18 of these relays in the TCRA board in location four of the <Q51> core can be “wetted” or powered to become solenoids. The first 16 of these relays on the TCRA board can be wetted also. This is done using hardware jumpers on the DTBC and DTBD terminal boards. Two additional contact outputs, (#47 and #48),