Agilent Technologies E4356A User Connections, Rear Panel Connections, Load Wire Selection, Awg

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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