Woodward 2301D, Инструкция по установке и эксплуатации, Страница: 20 / 130

2301D/2301D-EC Digital Control Manual 26247
12 Woodward
Load Sharing Lines
The Load Sharing Lines provide an analog communication path between
compatible controls. The 2301D provides an internal relay for connecting the
Load Sharing Signal to the internal circuitry at the appropriate times. When the
internal relay is closed, a green LED will illuminate between terminals 9 and 10.
Because the load-sharing-line relay is contained in the control, no relay is
required between the control and the load-sharing-line bus. Use shielded cable
and connect the load-sharing lines directly to terminals 10(+) and 11(–). Connect
the shield to terminal 12. When all controls in the system are of the 2301D or
2301A types, the shields may be connected continuously between controls.
When load sharing with different controls, do not connect the shields at the point
where connections are made to the load-sharing-line bus. The droop contact for
selecting droop or isochronous operation is wired in series with the circuit-
breaker auxiliary contact between terminal 34 and terminal 28 (see CB
Aux/Droop contact).
When running a single unit on an infinite bus with an external load control device,
terminals 34 and 37 must be connected to terminal 28 to connect the Load
Matching Circuit to the load-sharing lines. The load-sharing lines must be wired
to the external load control device. The circuit-breaker auxiliary contact will then
be connected to this device and not to the 2301D.
Power Supply
Run the power leads directly from the power source to the control, connecting the
negative lead to terminal 46, and the positive lead to terminal 45.
When power is applied, the 2301D begins performing internal memory tests to
‘boot-up’ the processor, which takes approximately 30 seconds to complete. The
CPU Status LED between terminals 27 and 28 remains on during this boot-up.
The control will remain in I/O lock and will not control the prime mover until the
boot-up is complete. For systems requiring fast start functions, it will be
necessary to continuously power the 2301D.
DO NOT attempt to start the prime mover while the CPU Status LED
is ON.
DO NOT apply power to the control at this time. Applying power
before a control is completely connected may damage the control.
The 18–40 Vdc input power must be supplied from a power
supply/battery charger certified to IEC standard with SELV (Safety
Extra Low Voltage) classified output. The installer should properly
size wiring and fusing for the input power and PT/CT circuits.