Chroma 16502 - IEEE-488 Connector and Signal Cable

Milliohm Meter 16502 User’s Manual
5-2
5.2.4 IEEE-488 Interface Connector
• Below shows the connector pin assignment:
1 DIO1 13 DIO5
2 DIO2 14 DIO6
3 DIO3 15 DIO7
4 DIO4 16 DIO8
5 EOI 17 REN
6 DAV 18 GND
7 NRFD 19 GND
8 NDAC 20 GND
9 IFC 21 GND
10 SRQ 22 GND
11 ATN 23 GND
12 SHIELD 24 GND
• Meter side connector:
DDK 57 LE-20240 or equivalent.
• Cable side connector.
DDK 57-10240 or equivalent.
5.2.5 Signal Cable of IEEE-488 Interface
The interface is composed of the data, the handshake and the control ports as shown in the
table below:
Port
Signal Cable of Port
Description
Data Port
DIO1 (Data Input/Output 1)
DIO2 (Data Input/Output 2)
DIO3 (Data Input/Output 3)
DIO4 (Data Input/Output 4)
DIO5 (Data Input/Output 5)
DIO6 (Data Input/Output 6)
DIO7 (Data Input/Output 7)
DIO8 (Data Input/Output 8)
Besides data input, it is also
used for interface and
device message input/output.
Handshake
Port
DAC (Data Valid) Indicate that the data on the data port are valid.
NRFD (Not Ready For Data) Indicate that the listener is ready to receive.
NDAC (Not Data Accepted)
Indicate that the listener has finished the data
reception.
Control
Port
ATN (Attention)
Indicate the signal on the data port carries data or
message of an interface or device.
REN (Remote Enable) Switch between remote and local control mode.
IFC (Interface Clear) Used to reset the interface.
SRQ (Service Request) Signal sent by talker to call the controller.
EOI (End of Identification) Indicate end of data.