INFICON RQCM - Quartz Crystal Microbalance Research System - Manual (Page 79)

RQCM – RESEARCH QUARTZ CRYSTAL MICROBALANCE
COMPUTER INTERFACE 7-3
7.7 IEEE-488 PARALLEL INTERFACE
The optional IEEE-488 interface provides the RQCM with the ability to communicate with
computers and other devices over a standard IEEE-488 interface bus. The IEEE-488 interface,
also known as GPIB or HPIB, provides an eight bit parallel asynchronous interface between up to
15 individual devices on the same bus. This means that one computer equipped with an IEEE-
488 interface card can communicate with up to 14 RQCMs or other devices.
The pin layout of the IEEE-488 port is shown in Figure 29 and Table 7-2 lists the pin signal
assignments, including a definition of whether the signal is an input or an output of the RQCM.
The RS-232 serial port can still be used with IEEE-488 installed. However, since both interfaces
use the same input and output message buffers, they should not be used at the same time. This
will result in communication errors.
Figure 29 IEEE-488 Connector
Pin Number Signal
1 DATA I/O 1
2 DATA I/O 2
3 DATA I/O 3
4 DATA I/O 4
5 End Or Identify
6 Data Valid
7 Not Ready For Data
8 Data Not Accepted
9 Service Request
10 Interface Clear
11 Attention
12 Shield or Wire GND
13 DATA I/O 5
14 DATA I/O 6
15 DATA I/O 7
16 DATA I/O 8
17 Remote Enable
18 GND
19 GND
20 GND
21 GND
22 GND
23 GND
24 Logic GND