Manual 85018V1
505E Digital Governor
Woodward
5
Sixteen contact inputs are available. Four are dedicated for shutdown, reset,
raise speed setpoint, and lower speed setpoint. Another two contact inputs must
be dedicated for generator breaker and utility tie breaker if the control is used in a
generator application. Ten additional contact inputs can be configured. If the unit
is not used in a generator application, then twelve additional contact inputs can
be configured.
Four function keys on the front panel of the control. F1 and F2 are dedicated to
alarm and overspeed test, respectively. F3 and F4 can be used to enable or
disable various functions of the control.
Control Outputs
Two actuator outputs with linearization curves for the HP and the LP valve
outputs.
Six 4–20 mA outputs, for meters or other readouts.
Eight Form-C relay contact outputs, six that are configurable. The two dedicated
relay outputs are for shutdown and alarm indication.
Control Communications
Two Modbus ports, to be used as control interfaces. The protocol can be either
ASCII or RTU and the communications can be RS-232, RS-422, or RS-485.
One computer (PC) port to be used for program configuration storage.
An overview of the 505E functions is shown in Figure 1-1. Use this block diagram
to match the control features to the site-specific application required.
Figure 1-1a. Overview of 505E Functionality (Notes)
