2.1 Channel Assignment
Alarm/Trip State: Each channel is individually assigned an alarm/trip state, wet or dry.
Cable Monitoring: Each probe is individually set as normally wet or dry. Normally wet probes require one
conductor and normally dry probes require two.
2.1 Local Indication
Each channel output drives a green LED for water or a red LED for steam, along with yellow flashing LEDs for
system and process fault, to a door mounted display.
2.2 Alarm/Trip and Fault Detection Relays
Seven 8A DPDT relays are supplied to provide contacts for alarms, trips or system fault annunciation.
RL1 through RL6 are independently selected to operate in energized (failsafe) or de-energized normal state.
When operated in the energized state, trip will occur in the event of power loss to the system.
RL1through RL6 are independently set to delay 1 second, 5 seconds, 10 seconds or 15 seconds.
RL7 System Fault, is set to a normally energized state with a delay of 15 seconds; these functions are not ad-
justable.
2.2.1 Alarm/Trip Modes
RL1through RL6 can be set to operate on a single channel state or in channel pairs. The following table shows
the options and pairing.
See 7.1 for location of the solder jumps to invoke these options. Voting logic is effected by making all of the
channel pairings for the given relay.
3
Relay
Alarm/Trip
Single Channel Channel Pairings
Voting Logic
2 out of 3 Channels
RL1
Channel 1
Channels 1 & 2
Channels 1 & 3
Channels 2 & 3
Poll Channels
1, 2 & 3
RL2
Channel 2
Channels 1 & 2
Channels 2 & 3
Channels 1 & 3
Poll Channels
1, 2 & 3
RL3
Channel 3
Channels 2 & 3
Channels 3 & 4
Channels 2 & 4
Poll Channels
2, 3 & 4
RL4
Channel 4
Channels 3 & 4
Channels 4 & 5
Channels 3 & 5
Poll Channels
3, 4 & 5
RL5
Channel 5
Channels 4 & 5
Channels 5 & 6
Channels 4 & 6
Poll Channels
4, 5 & 6
RL6
Channel 6
Poll Channels
4, 5 & 6
Channels 5 & 6
Channels 4 & 6
Channels 4 & 5
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