Lake Shore Model 218 Temperature Monitor User’s Manual
Service
7-5
7.8 IEEE-488 INTERFACE CONNECTOR (MODEL 218S ONLY)
Connect to the IEEE-488 Interface connector on the Model 218 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 m for each device on the bus, or 20 m maximum. A
system may be composed of up to 15 devices. Figure 7-5 shows the IEEE-488 Interface connector pin
location and signal names as viewed from the Model 460 rear panel.
C-218-7-5.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 7-5. IEEE-488 Rear Panel Connector Details