Lake Shore Model 647 Magnet Power Supply User’s Manual
5-7
Troubleshooting
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
7
6
5
4
3
2
1
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
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 5-4 Model 2001 RJ-11 Cable Assembly Wiring
6
543
21
6543
21
TxD
Gnd
Gnd
RxD
YELL OW
GREEN
RED
BLACK
5
4
3
2
1
9
8
7
6
1 2 3 4 5 6
RxD
Gnd
TxD
Figure 5-5 Model 2002 RJ-11
to DB-9 Adapter Wiring
DB-9
CONNECTOR
RJ-11
RECEPTACLE
Figure 5-6 Model 2003 RJ-11
to DB-25 Adapter Wiring
1
3
1
2
11
1
09
8
7
6
5
4
3
2
1
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1 2 3 4 5 6
RxD
Gnd
TxD
DB-25
CONNECTOR
RJ-11
RECEPTACLE
= Not Used
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
