Lake Shore Model 331 Temperature Controller User’s Manual
8.4.2
IEEE-488 Interface Connector
Connect to the IEEE-488 Interface connector on the Model 331 rear with cables specified in the
IEEE-488-1978 standard document. The cable has 24 conductors with an outer shield. The
connectors 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 two
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. The Model 331 can drive a bus of up to 10 devices. A connector extender is required to
use the IEEE-488 Interface and Relay Terminal Block at the same time. Figure 8-6 shows the IEEE-
488 Interface connector pin location and signal names as viewed from the Model 331 rear panel.
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-331-8-6.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
DIO 1
DIO 2
DIO 3
DIO 4
EOI
DAV
NRFD
NDAC
IFC
SRQ
ATN
SHIELD
DIO 5
DIO 6
DIO 7
DIO 8
REN
GND 6
GND 7
GND 8
GND 9
GND 10
GND 11
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 8-6. IEEE-488 Rear Panel Connector Details
8-6
Service
