4

User Connections

Rear Panel Connections

Make application load connections to the output terminals or bus bars, analog connector, and digital connector as shown on the rear-panel drawing for your model power supply. Make controller connections (GPIB and serial link) as shown in Figure 4-6 at the end of this chapter.

Load Wire Selection

Fire Hazard To satisfy safety requirements, load wires must be large enough not to overheat when carrying the maximum short-circuit current of the power supply. If there is more than one load, then any pair of load wires must be capable of safely carrying the full-rated current of the unit.

Table 4-1 lists the characteristics of AWG (American Wire Gauge) copper wire.

AWG

No.

14

12

10

1.

 

 

Table 4-1. Stranded Copper Wire Capacity and Resistance

 

 

 

Ampacityl

 

Resistance2

 

AWG

 

Ampacity1

 

 

 

Resistance2

 

 

 

 

 

 

 

 

 

 

 

(Ω/m)

 

No.

 

 

 

 

 

(Ω/m)

 

 

25

 

0.0103

 

8

 

60

 

 

 

0.0025

 

 

30

 

0.0065

 

6

 

80

 

 

 

0.0016

 

 

40

 

0.0041

 

4

 

105

 

 

 

0.0010

 

NOTES:

Ampacity is based on 30 °C ambient temperature with conductor rated at 60 °C. For ambient temperature other than 30 °C, multiply the above ampacities by the following constants:

2.

Temp (°C)

Constant

Temp (°C)

Constant

21-25

1.08

41-45

0.71

26-30

1.00

46-50

0.58

31-35

0.91

51-55

0.41

36-40

0.82

 

 

Resistance is nominal at 75 °C wire temperature.

Analog Connector

This connector, which is on the rear panel, is for connecting remote sense leads, external current monitors, and external programming sources. The connector accepts wires sizes from AWG 22 to AWG 12.

￿ Insert Wires

Tighten Screws

IM

Current monitor output.

VP

Voltage programming input.

+IP

Differential current programming input.

–IP

Differential current programming input.

P Common for VP and IM signals (referenced to +OUT).

+S

+ remote sense input.

–S

–remote sense input.

Figure 4-1. Rear Panel Analog Connector

User Connections 27

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Image 27
Agilent Technologies E4356A manual User Connections, Rear Panel Connections, Load Wire Selection, Analog Connector, Awg