Woodward 2301E-ST, Installation And Operation Manual

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Manual 26694 2301E-ST
Woodward 24
Any of the four relays can be programmed to function as a level switch. When programmed as a level
switch the relay will change state when the selected parameter reaches the programmed level (energizes
when value is higher the programmed level). The following is a list of the level switches:

TURBINE SPEED

TURBINE SPEED REFERENCE

VALVE LIMITER REFERENCE

ACTUATOR DEMAND

GENERATOR OUTPUT

SIGNAL MONITOR
These discrete outputs are low-side drivers with a maximum output current of 160 mA. The discrete
output drivers are isolated from the control’s internal power supply, but not from each other and are
powered by an ex12 Vdc or +24 Vdc source connected at terminals 42(+) and 43(–). Refer to
Figure 2-2 for plant wiring information.
Relay Driver Clarifications
1. SHUTDOWN
Each relay driver can be programmed to indicate a Shutdown Condition (energizes for a shutdown
condition) or a Trip Relay (de-energizes for a shutdown/trip).
2. ALARM
Each relay driver can be programmed to indicate a general Alarm Condition (energizes for an alarm
condition) or an Alarm Relay (de-energizes for an alarm).
3. ELECTRICAL OVERSPEED TEST
Each relay driver can be programmed to indicate that the electrical turbine overspeed was sensed.
4. VALVE LIMITER IN CONTROL
Each relay driver can be programmed to indicate the valve limiter controls the actuator/ valve.
5. SPEED PID IN CONTROL
Each relay driver can programmed to indicate the speed PID controls the actuator/valve.
6. MODBUS CONTROLLED RELAY #1
Each relay driver can be programmed to indicate the Modbus controlled relay #1 according to the
following function.
7. MODBUS CONTROLLED RELAY #2
Each relay driver can be programmed to indicate the Modbus controlled relay #2 according to the
following function.
8. MODBUS CONTROLLED RELAY #3
Each relay driver can be programmed to indicate the Modbus controlled relay #3 according to the
following function.
9. MODBUS CONTROLLED RELAY #4
Each relay driver can be programmed to indicate the Modbus controlled relay #4 according to the
following function.
10. LEVEL SWITCH
Each relay driver can be programmed to function as a level switch. If the level switch feature is
selected, its ON level and OFF level must also be configured.
Released