Pfeiffer Vacuum A 1204H, Operating Instructions Manual

Page: 52 / 92

52
Control interfaces
8.3 Remote control J1 connector
8.3.1 Description
Connection made via the connector J1 (Male D-Sub - 50 pin connector) (see 4.2) , allows:
– Remote control of pumping functions start, stop, purge, Roots and inlet valve.
– Remote pump status through auxiliary dry contacts.
Remote control mode is active when [DEFINITION] [CONTROL MODE] [REMOTE] is
selected (see 8.2) .
8.3.2 Wiring of digital inputs
These inputs are considered active when a DC voltage between 5 and 30 V is applied
(wiring is customer’s responsibility).
Fig. 13: J1 connector : control with DC voltage
These inputs can be powered by pins 47, 48 (OV) and pins 49, 50 (24V), in order to be
controlled by external contacts of the customer equipment (wiring is customer’s respon-
sibility).
Fig. 14: J1 connector : control with dry contacts
NOTICE
Extra low voltage circuit
The remote control circuits are equipped with dry contact outputs (30 V - 1 A max.).
Any overvoltage or overcurrent can result in internal electrical damage. The installer
must:
Connect these outputs in accordance with the rules and protection of safety extra low
voltage (SELV) circuits,
Supply these contacts with voltage of less than 30 V and current of less than 1 A.
17 1
50 34
18 19 20 21 22 23 24 25 27 29 31 32 33 26 28 30
+ - - - - - - - + + + + + + - +
17 1
50 34 47
18
19
20 21
22 23
24 25 27 29 31 32
33
0V
S1 S2 S3 +24V
26 28 30
S4 S5 S6 S7 S8
Contact Function
S1 (18-19) HHR or REMOTE
mode
Contact closed: local mode.
Contact open: remote control mode.
This function is valid when
[DEFINITION] [CONTROL MODE] [REMOTE] is selected.