Annex
NRP2
355User Manual 1173.9140.02 ─ 07
For specifications refer to the data sheet.
A.2.1 GPIB Bus Interface
A.2.1.1
Characteristics of the interface
●
8-bit parallel data transmission
●
Bidirectional data transmission
●
Three-wire handshake
●
Data transmission rate up to 350 Kbyte/s
●
Connection of up to 15 devices
●
Max. length of connecting cables: 15 m (length of single cable: 2 m)
●
Wired OR links when several devices are connected in parallel.
A.2.1.2
Pin assignment
DIO1
DIO2
DIO3
DIO4
EOI
DAV
NRFD
NDAC
IFC
SRQ
ATN
Shield
DIO7RENGND(6)logic GND GND(10) GND(8)
DIO5DIO6DIO8GND(11) GND(9) GND(7)
24 13
1415
16
1718
1920
212223
112
11 10 9
8 7 6 5 4 3 2
Fig. 1-1: Pin assignment of GPIB-bus interface
A.2.1.3 Bus lines
●
Data bus with 8 lines DIO1 to DIO8:
The transmission is bit-parallel and byte-serial in the ASCII/ISO code. DIO1 is the
least significant bit, DIO8 the most significant bit.
●
Control bus with five lines:
– IFC (Interface Clear):
IFC (Interface Clear)Active LOW resets the interfaces of the connected devices
to the default state.
– ATN (Attention):
Active LOW indicates the transmission of interface messages;
non-active HIGH indicates the transmission of device messages.
Remote control interfaces
北京海洋兴业科技股份有限公司（证券代码：839145）
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