General; J2 Connector; J3 Connector; J4 Connector - Varian Turbo-V70 Instructions Manual

2-1 General

Inspect the controller for any shipping damage.
The controller is designed to be installed into a rack.
All the connections are fitted to J2, J3, J4 and J5
connectors.
Should the controller be connected to a host computer
via the-RS-232 interface, a suitable cable must be
prepared.
In the following paragraphs
input/output signals.
The PCB installed into the customer system must be
positioned so that cold
convection) can flow through the PCB components.

2-2 J2 connector

The signals of J2 connector are the following:
•
Pins 1/2 Power supply 24. Vdc (20 to 32 Vdc) (pin
2 positive).
•
Pins 4/3 Kl relay contacts. The relay switches when
the output frequency overrides the set threshold
(800 Hz). The threshold overriding is indicated also
on pin 6 of J4 connector.

2-3 J3 connector

The signals of J3 connector are the following:
•
Pin 1 42 Vac 3-phase output to pump motor stator
(phase T).
•
Pin 2 42 Vac 3-phase output to. pump motor stator
(phase S).
•
Pin 3 42 Vac 3-phase output to pump motor stator
(phase R).
•
Pins 5/4 Pump temperature sensor.
are detailed
NOTE
air (forced or natural

2-4 J4 connector

The signals of J4 connector are the following:
•
Pin 3 Failure. When a fault condition is detected,
the pump is stopped and a signal is present on this
pin.
•
Pin 5 Low Speed mode activated. When the Low
Speed mode is activated a signal is present on this
pin.
•
Pin 6 When the output frequency is less than 800
the
Hz, a signal is present on this pin.
•
Pin 7 Analog output. A voltage from 0 to 10 Vdc
proportional to the supply current (from 0 to 2.5 A).
•
Pin 8 Analog output. A voltage from 0 to 10 Vdc
proportional to the output pump motor driving
frequency (from 0 to 1250 Hz).
•
Pin 11 Error reset command. Should an operation
fault be detected (presence of signal on pin 3 of J4),
the pump is stopped. To reset the fault you must
connect pin I I to ground (pin 15 of J4) for at least I
sec.
•
Pin 12 ON/OFF pump. To stop the pump you must
connect pin 12 to ground (pin 15 of J4); to start the
pump you must remove the contact between pin 12
and ground.
•
Pin 13 Low Speed mode activation.
contact between pin 13 and ground (pin 15 of J4)
closes, the turbopump runs at low speed and when
the contact opens, the turbopump reverts to high
speed mode. When the Low Speed mode is
activated an output signal is present on pin 5 of J4.
The Low Speed frequency is 830 Hz.

2-5 J5 RS-232 interface connector

The signal of J5, the RS-232 interface connector, are
the following:
•
Pin 1 Ground.
•
Pin 2 RXD. Received data.
•
Pin 3 TXD. Transmitted data.
4
SECTION II - INSTALLATION
When the
87-900-879-01 (A)