Woodward 2301E, Инструкция по установке и эксплуатации, Страница: 33 / 182

Manual 26641 2301E Digital Control
Woodward 23
Speed Sensor (Terminals 25-26)
Connect a speed-sensing device, such as a magnetic pickup, to terminals 25 and
26 using shielded wire. Connect the shield to terminal 27 (chassis), making sure
the shield has continuity the entire distance to the speed sensor, and that the
shield is insulated from all other conducting surfaces.
This input is limited to a frequency range of 100
–24 950 Hz and a voltage range
of 1.7
–35 Vac. (The MPU voltage at the 2301E must be above 2.7 Vac in case of
a signal above 13 000 Hz.)
With proper MPU, gear size and MPU-to-gear clearance, speed measurement
should be capable down to 100 Hz. Check the speed sensor for visible damage.
Standard MPU clearance is recommended to be between 0.25 and 1.0 mm
(0.010 and 0.040 inch) at the closest point. Make sure that the gear has less than
0.5 mm (0.020 inch) diametric run out. See manual 82510,
Magnetic Pickups and
Proximity Switches for Electronic Governors .
Relay Driver Outputs (Terminals 42, 43, & 44
–48)
The 2301E contains four discrete output driver channels. The discrete outputs
are low-side drivers with a maximum output current of 200 mA. The discrete
output drivers are not isolated from each other, and are powered by an external
+12 Vdc or +24 Vdc source connected at terminals 42(+) and 43(
–). The Relay
Driver Output pins are: #1(44), #2(43), #3(46), and #4(47). The relay driver
section is isolated from the internal power supplies of the 2301E control, but all
drivers share a single common. The outputs can be configured for the next
parameters:

Relay driver #1 can be used as a PWM actuator driver or a relay driver
depending on the selection of the Actuator Output in the Configure menu.
o
When configured as a PWM, power wiring configuration is dictated.

Shutdown indication
—The discrete output will activate when a Shutdown is
sensed.

Alarm
—The discrete output will activate when an Alarm is sensed.

Elec overspeed trip test
—The discrete output will activate if the engine
speed exceeds the overspeed setpoint. The discrete output will de-activate
when the engine speed drops below the overspeed setpoint.

Start fuel limiter in control
—The discrete output will activate if the Start Fuel
limiter is in control of the fuel demand. The discrete output will de-activate
when something else is in control of the fuel demand.

Speed PID in control
—The discrete output will activate when Speed is in
control of the fuel demand. The discrete output will de-activate when
something else is in control of the fuel demand.

Circuit Breaker open
—The discrete output will toggle True then False for the
Breaker Open Time, when the load falls below the Unload Trip level, or if the
load is at minimum for 5 seconds.

Overload contact
—The discrete output is only active if a Manifold Air
Pressure (MAP) input is used. The discrete output will activate if the fuel
demand reaches maximum.

Level switch
—If one of the discrete outputs is selected for a level switch
then one of the following can be set up to act as a switch, with on and off
values: Speed, Speed setpoint, Start limiter, Fuel Demand, Generator Load.

CPU Failure
—If the control fails, this selection will de-activate a discrete
output.

In Remote Speed Control
—If the control is enabled for Remote Speed
control function, this discrete output will activate.