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Cirrus SP101013.111 – 10 October 2012
MKS Instruments UK Ltd., Spectra Products
19
Digital I/O
The Digital I/O connector is a 25-way D-Type socket
.
It is used to connect accessories such as a Remote Vacuum Controller.
The Digital I/O connector can also be used to provide alarm output signals and process trip signals.
See Page 4 for maximum cable lengths.
The Digital I/O port provides:
Two 8 bit bi-directional ports
One interrupt / strobe input
+5V fused at 100mA
±
15V fused at 100mA
Pin
Description
Notes
1
H1 interrupt / strobe
2
PA1
3
PA3
4
PA5
5
PA7
6
PB1
7
PB3
8
PB5
9
PB7
10
0V Digital
11
0V Analogue
12
-15V fused
13
+15V fused
14
PA0
15
PA2
16
PA4
17
PA6
18
PB0
19
PB2
20
PB4
21
PB6
22
+5V fused
23
Not Connected
24
Not Connected
25
Not Connected
Note:
The total power consumption on each rail (+5V and
±
15V) for both the Analog and Digital I/O
ports must not exceed 100mA.