Lake Shore Model 340 Temperature Controller User’s Manual
Service
11-5
11.4.1 IEEE-488 Interface Connector
Connection to the IEEE-488 Interface connector on the rear of the Model 340 Temperature Controller is made
using cables specified in the IEEE-488-1978 standard document. Briefly, the cable has 24 conductors with an
outer shield. The connectors at each end are 24-way Amphenol 57 Series (or equivalent) with piggyback
receptacles to allow daisy-chaining in multiple device systems. The connectors are secured in the receptacles
by a pair of captive locking screws with metric threads.
The total length of cable allowed in a system is 2 meters for each device on the bus, or 20 meters maximum.
This instrument can drive a bus with up to 10 devices. Figure 11-7 shows the IEEE-488 Interface connector
pin location and signal names as views from the rear panel of the controller.
11
12
10
9
8
7
6
5
4
3
2
1
23
24
22
21
20
19
18
17
16
15
14
13
IEEE-488 INTERFACE
SH1 AH1 T5 L4 SR1 RL1 PP0 DC1 DT0 C0 E1
C-340-11-7.eps
PIN SYMBOL
DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
DIO1
DIO2
DIO3
DIO4
EOI
DAV
NRFD
NDAC
IFC
SRQ
ATN
SHIELD
DIO5
DIO6
DIO7
DIO8
REN
GND 6
GND 7
GND 8
GND 9
GND 10
GND11
GND
Data Input/Output Line 1
Data Input/Output Line 2
Data Input/Output Line 3
Data Input/Output Line 4
End Or Identify
Data Valid
Not Ready For Data
Not Data Accepted
Interface Clear
Service Request
Attention
Cable Shield
Data Input/Output Line 5
Data Input/Output Line 6
Data Input/Output Line 7
Data Input/Output Line 8
Remote Enable
Ground Wire – Twisted pair with DAV
Ground Wire – Twisted pair with NRFD
Ground Wire – Twisted pair with NDAC
Ground Wire – Twisted pair with IFC
Ground Wire – Twisted pair with SRQ
Ground Wire – Twisted pair with ATN
Logic Ground
Figure 11-7. IEEE-488 Rear Panel Connector Details