INFICON RQCM - Quartz Crystal Microbalance Research System - Manual (Page 91)

RQCM – RESEARCH QUARTZ CRYSTAL MICROBALANCE
I/O CARD (OPTIONAL) 9-1
9 I/O CARD (OPTIONAL)
The RQCM has one rear panel slot for the optional I/O card. The card has eight (8) TTL level (0
to 5 volt DC) inputs. The inputs are pulled up to 5 volts internally through a 4.7 KΩ resistor and
are set true, assuming the input’s True level is set to Low, by shorting the input pins together.
There are eight (8) SPST relay outputs capable of handling 120 VA, 2A max. per relay.
These inputs and outputs can be used to control external instruments and peripheral devices such
as pumps, heaters, valves, instruments, etc.
Figure 32 shows the connector pin configuration and Table 9-1 supplies pin signal assignments.
Refer to the online help of RQCM computer software for I/O definition and programming
instructions.
Figure 32 DB73P I/O Rear Panel Connector
Pin Number Function
1, 20 Abort output
2, 21, 11 Output 1 (Common, N.O., N.C.)
3, 22, 29 Output 2 (Common, N.O., N.C.)
4,23 Output 3
5, 24 Output 4
6, 25 Output 5
7, 26 Output 6
8, 27 Output 7
9, 28 Output 8
30 Input 1
12 Input 1 Return
31 Input 2
13 Input 2 Return
32 Input 3
14 Input 3 Return
33 Input 4
15 Input 4 Return
34 Input 5
16 Input 5 Return
35 Input 6
17 Input 6 Return
36 Input 7
18 Input 7 Return
37 Input 8
19 Input 8 Return
Table 9-1 DB37P I/O Rear Panel Connector Pin Assignments