24
Installation
iina
74
e 0
2
.f
m
te
chn
ica
l ha
nd
boo
k
(1
40
8)
2.3.2.1
Accessories
The following accessories may be connected to this port
•
external venting valve
•
sniffer probe
Contact pins 1 and 3 are fused with a 0.8 A slow-blow fuse. The amount of power
which can be drawn is limited to 10 W. The contacts are numbered from top to
bottom.
2.3.2.2
Digital Out
The following relay outputs are available for further signal processing. The maximum
rating for the relay contacts is 25V AC/1A.
Description of the operation mode of the Digital Out.
Trigger 1
:
Is open in case Trigger Level 1 is exceeded or the machine is not in condition of
measuring.
Trigger 2
:
Is open in case Trigger Level 2 is exceeded or the machine is not in condition of
measuring.
Zero active
:
Is closed in case Zero function is running.
Ready
:
Is closed in case machine is ready for measurement (Emission on, no error).
CAL active
Closed when machine is in calibrating routine.
CAL Request
Is opened in case of calibration request. During external calibration an open output
indicates that the external calibrated leak has to be closed.
Error
Open when an error is shown.
Warning
Open when a warning is shown.
Pin
Assignment
1
+24 V, constantly applied, power supply for
the INFICON partial flow valve or sniffer line.
2
GND24
3, 6
Input
4, 5, 7, 8
Output
Pin
Assignment
Pin
Assignment
1
+24V, bridged with pin 1
of socket „Digital In“
9
CAL request
2
GND_24V
10
Error
3
Trigger 1
11
Warning
4
Trigger 2
12
Purge
5
Reserved
13
Measure
6
Zero active
14
Recorder Strobe
7
Ready
15
Common dig. out
8
CAL active
16
Reserved
