![background image](http://html1.mh-extra.com/html/varian/969-9504/969-9504_instruction-manual_854650056.webp)
TECHNICAL INFORMATION
51
87-900-856-01 (B)
INTERCONNECTIONS
The following figure shows the Controller interconnections.
Controller interconnections
Connection P17 - Mains and Input/Output
Interconnections
Input/output signals and mains must be connected to
J17 mating connector (not provided). Make the
connections with AWG 20 (0.5 mm
2
) to the pins
indicated in the following figure, to obtain the desired
capability.
The following table describes the signals available on
the connector.
PIN
DESCRIPTION
a8
GROUND power connection.
a2
MAINS neutral connection.
b2
MAINS line connection.
a5
SIGNAL COMMON connection for all
input/output signals.
a6-a5
Remote LOW SPEED, requires a
permanently closed contact (relay contact,
transistor etc).
When the first time contact closes, the
turbopump runs at low speed and when
the contact opens, the turbopump reverts
to high speed mode.
PIN
DESCRIPTION
a4-a5
R2 INTERLOCK, requires a permanent
closed contact to set at infinite the run-up
time.
After closure, when the contact is
reopened, the run-up time is set to zero
minutes.
b7-a5
Remote STOP signal, requires a closed
contact and it is used to stop the pump.
When the conract is closed, the
turbopump and the interconnected
devices are stopped.
b8-a5
Remote RESET, requires a momentarily
closed contact for at least 0.5 seconds to
reset the pump after failure.
b6-a5
ANALOG OUTPUT SPEED signal 0 to
+10 Vdc proportional to pump rotational
speed 0 to 56000 RPM.
a7-a5
VENT VALVE output voltage.
+24 Vdc without load; +6.5 Vdc with vent
valve load (430 Ohm).
The output voltage is present when the
turbopump is started, and will remain
present for about 5 more seconds after
the turbopump is stopped or after a power
failure.