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5.6
IEEE-488 INTERFACE CONNECTOR
(When Model 6224 Option Is Present)
Connect to the rear MPS IEEE-488 Interface
connector with cables specified in the IEEE-488-
1978 standard document. 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 daisy-
chain multiple devices. Secure the connectors 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
total for a maximum of 15 devices. The figure below
and the table to the right shows the IEEE-488
Interface connector pin location and signal names.
Figure 5-3 IEEE-488 Interface Connector
SH1 AH1 T5 L4 SR1 RL1 PP0 DC1 DT0 C0 E1
1
2 11 1
0 9
8
2
4 2
3 2
2 2
1 2
5.7
SERIAL INTERFACE CABLE AND ADAPTERS
To aid in Serial Interface troubleshooting, the figures below provide wiring information for the cable assembly
and the two mating adapters.
Figure 5-5 Model 2002 RJ-11
to DB-9 Adapter Wiring
5
4
3
9
8
DB-9
CONNECT OR
RxD
Gnd
1 2 3 4 5 6
RJ-11
RECEPTACLE
5-7
Lake Shore Model 647 Magnet Power Supply User's Manual
7
6
5
4
3
2
1
0 1
9 1
8 1
7 1
6 1
5 1
4 1
3
Figure 5-4 Model 2001 RJ-11 Cable Assembly Wiring
TxD
Gnd
Gnd
RxD
2
1
7
6
TxD
PIN
SYMBOL
1
DIO1
2
DIO2
3
DIO3
4
DIO4
5
EOI
6
DAV
7
NRFD
8
NDAC
9
IFC
10
SRQ
11
ATN
12
SHIELD
13
DIO5
14
DIO6
15
DIO7
16
DIO8
17
REN
18
GND 6
19
GND 7
20
GND 8
21
GND 9
22
GND 10
23
GND11
24
GND
YELL OW
GREEN
RED
BLACK
Figure 5-6 Model 2003 RJ-11
to DB-25 Adapter Wiring
1
2
CONNECTOR
RECEPTACLE
= Not Used
DESCRIPTION
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
3 1
2 11
1
0 9
8
7
6
5
4
3
2
1
5 2
4 2
3 2
2 2
1 2
0 1
9 1
8 1
7 1
6 1
5 1
4
DB-25
RxD
Gnd
TxD
1 2 3 4 5 6
RJ-11
Troubleshooting
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