Keithley 3700 series Installation Instructions Manual
Series 3700 Cables and Connector Kits
Installation Instructions
Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, Ohio 44139
1-88
8-KEITHLEY
www.keithley.com
Introduction
This instruction sheet contains information for the Keithley Instruments Series 3 700 System Switch/Multimeter
cables and connector kits. These kits include all necessary hardware to assemble cables and connectors, as
needed.
WARNING These installation instructions are intended for use by qualified service
personnel only. Do not assemble connectors or make connections to them
unless qualified to do so. Failure to recognize and observe normal safety
precautions could result in personal injury or death.
Do not exceed the maximum specifications of the switching module.
General information
The following table lists available cable and connector kits, the number of conncetor pins for each kit, and cable
length (where applicable).
Table 1: Series 3700 cables and connector kits
Model number Number of pins Description Length
3720-MTC-1.5 78 Cable 1.5 m (5 ft)
3720-MTC-3 78 Cable 3 m (10 ft)
3721-MTC-1.5 50 Cable 1.5 m (5 ft)
3721-MTC-3 50 Cable 3 m (10 ft)
3722-MTC-1.5 104 Cable 1.5 m (5 ft)
3722-MTC-3 104 Cable 3 m (10 ft)
3722-MTC-1.5/MM 104 Cable 1.5 m (5 ft)
3722-MTC-3/MM 104 Cable 3 m (10 ft)
3732-MTC-1.5 78 Cable 1.5 m (5 ft)
3732-MTC-3 78 Cable 3 m (10 ft)
3790-KIT50-R 50 Connector Kit N/A
3791-KIT78-R 78 Connector Kit N/A
3792-KIT104-R 104 Connector Kit N/A
3792-KIT104-R/F 104 Connector Kit N/A
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Series 3700 Cable and Connector Kits Installation Instructions
Model 3720-MTC-1.5 / 3.0
The Model 3720-MTC-1.5 / 3.0 cable is a 78-pin cable assembly (1.5m (5 ft) or 3.0m (10 ft) in length) terminated
with a male D-sub connector on one end and a female D-sub connector on the other end.
Figure 1: Model 3720-MTC-1.5 / 3.0 cable
WARNING Make sure the instrument that you are installing is in a powered-down state
with all cables unplugged. Failure to install an instrument in a discharged
state may cause personal injury or death from electrical shock. Do not
exceed the maximum specifications of the switching module.
To prevent electrical shock, observe the following safety precautions:
• Both ends of the cable must be connected before applying any power
to the system.
• Remove all power in the system before connecting the cable to a
switching module or external circuitry.
• Both D-sub connector shells of this cable must be connected to a
safety earth ground. A shock hazard exists when voltage levels greater
than 30V RMS, 42.4V peak, or 60V DC are present.
Cable maximum signal levels
The Model 3720-MTC-1.5 / 3.0 cable is rated for 300V DC or 300V RMS.
Maximum current rating
The Model 3720-MTC-1.5 / 3.0 cable maximum current ratings are as follows:
Single conductor: 4.4A
Multiple conductors: 2.2A per wire
Conductor gauge: 22 AWG
Pin number identification
Pin number identification for the Model 3720-MTC-1.5 / 3.0 cables are shown in Figure 2 and Table 2 below:
Figure 2: Model 3720-MTC-1.5 / 3.0 pin number identification
Male D-sub connector: Female D-sub connector:
1
21
40
60
2 PA-949 R
78
20
39
59
59
20
39
78
1
21
40
60
ev. D / May 2011
Series 3700 Cable and Connector Kits Installation Instructions
Table 2: Model 3720-MTC-1.5 / 3.0 pin number identification
1
CONN
1 Pin #
1 Black 1 40 White / Red / Gray 40
2 Brown 2 41 White / Orange / Yellow 41
3 Red 3 42 White / Orange / Green 42
4 Orange 4 43 White / Orange / Blue 43
5 Yellow 5 44 White / Orange / Violet 44
6 Green 6 45 White / Orange / Gray 45
7 Blue 7 46 White / Yellow / Green 46
8 Violet 8 47 White / Yellow / Blue 47
9 Gray 9 48 White / Yellow / Violet 48
10 White 10 49 White / Yellow / Gray 49
11 White / Black 11 50 White / Green / Blue 50
12 White / Brown 12 51 White / Green / Violet 51
13 White / Red 13 52 White / Black / Orange / Yellow 52
14 White / Orange 14 53 N / C2 53
15 White / Yellow 15 54 N / C 54
16 White / Green 16 55 N / C 55
17 White / Blue 17 56 N / C 56
18 White / Violet 18 57 N / C 57
19 White / Gray 19 58 N / C 58
20 White / Black / Brown 20 59 N / C 59
21 White / Black / Red 21 60 White / Black / Orange / Green 60
22 White / Black / Orange 22 61 White / Black / Orange / Blue 61
23 White / Black / Yellow 23 62 White / Green / Gray 62
24 White / Black / Green 24 63 White / Blue / Violet 63
25 White / Black / Blue 25 64 White / Blue / Gray 64
26 White / Black / Violet 26 65 White / Violet / Gray 65
27 White / Black / Grey 27 66 White / Black / Brown / Red 66
28 White / Brown / Red 28 67 White / Black / Brown / Orange 67
29 White / Brown / Orange 29 68 White / Black / Brown / Yellow 68
30 White / Brown / Yellow 30 69 White / Black / Brown / Green 69
31 White / Brown / Green 31 70 White / Black / Brown / Blue 70
32 White / Brown / Blue 32 71 White / Black / Brown / Violet (s) 71
33 White / Brown / Violet 33 72 N / C 72
34 White / Brown / Gray 34 73 White / Black / Brown / Gray 73
35 White / Red / Orange 35 74 White / Black / Red / Yellow 74
36 White / Red / Yellow 36 75 White / Black / Red / Green 75
37 White / Red / Green 37 76 White / Black / Red / Blue 76
38 White / Red / Blue 38 77 White / Black / Red / Violet 77
39 White / Red / Violet (s)3 39 78 White / Black / Red / Gray 78
Color
CONN 2
Pin #
CONN 1
Pin #
Color
CONN 2
Pin #
1
Connect drain wire to shield at both ends.
2
N/C = Not connected
3
(s) = Spare.
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Series 3700 Cable and Connector Kits Installation Instructions
Model 3721-MTC-1.5 / 3.0
The Model 3721-MTC-1.5 / 3.0 cable is a 50-pin cable assembly (1.5m (5 ft) or 3.0m (10 ft) in length) terminated
with a male D-sub connector on one end and a female D-sub connector on the other end.
Figure 3: Model 3721-MTC-1.5 / 3.0 cable
WARNING Make sure the instrument that you are installing is in a powered-down state
with all cables unplugged. Failure to install an instrument in a discharged
state may cause personal injury or death from electrical shock. Do not
exceed the maximum specifications of the switching module.
To prevent electrical shock, observe the following safety precautions:
• Both ends of the cable must be connected before applying any power
to the system.
• Remove all power in the system before connecting the cable to a
switching module or external circuitry.
• Both D-sub connector shells of this cable must be connected to a
safety earth ground. A shock hazard exists when voltage levels greater
than 30V RMS, 42.4V peak, or 60V DC are present.
Cable maximum signal levels
The Model 3721-MTC-1.5 / 3.0 cable is rated for 300V DC or 300V RMS.
Maximum current rating
The Model 3721-MTC-1.5 / 3.0 cable maximum current ratings are as follows:
Single conductor: 4.4A
Multiple conductors: 2.2A per wire
Conductor gauge: 22 AWG
Pin number identification
Pin number identification for the Model 3721-MTC-1.5 / 3.0 D-sub connectors are shown in Figure 4 and Table 3 below:
Figure 4: Model 3721-MTC-1.5 / 3.0 pin number identification
Male D-sub connector: Female D-sub connector:
1
18
34
4 PA-949 R
17
50
33
33
17
50
34
1
18
ev. D / May 2011
Series 3700 Cable and Connector Kits Installation Instructions
Table 3: Model 3721-MTC-1.5 / 3.0 pin number identification4
CONN 1
Pin #
1 Black 1 26 Orange / Black / White 26
2 White 2 27 Blue / Black / White 27
3 Red 3 28 Black / Red / Green 28
4 Green 4 29 White / Red / Green 29
5 Orange 5 30 Red / Black / Green 30
6 Blue 6 31 Green / Black / Orange 31
7 White / Black 7 32 Orange / Black / Green 32
8 Red / Black 8 33 Blue / White / Orange 33
9 Green / Black 9 34 Black / White / Orange 34
10 Orange / Black 10 35 White / Red / Orange 35
11 Blue / Black 11 36 Orange / White / Blue 36
12 Black / White 12 37 White / Red / Gblue 37
13 Red / White 13 38 Black / White / Green 38
14 Green / White 14 39 White / Black / Green 39
15 Blue / White 15 40 Red / White / Green 40
16 Black / Red 16 41 Green / White / Blue 41
17 White / Red 17 42 Orange / Red / Green 42
18 Orange / Red 18 43 Blue / Red / Green 43
19 Blue / Red 19 44 Black / White / Blue 44
20 Red / Green 20 45 White / Black / Blue 45
21 Orange / Green 21 46 Red / White / Blue 46
22 Black / White / Red 22 47 Green / Orange / Red 47
23 White / Black / Red 23 48 Orange / Red / Blue 48
24 Red / Black / White 24 49 Blue / Orange / Red 49
25 Green / Black / White 25 50 Black / Orange / Red 50
Color
CONN 2
Pin #
CONN 1
Pin #
Color
4
Connect drain wire to shield at both ends.
CONN 2
Pin #
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