Agilent Technologies E4374A Voltage Drops and Wire Resistance, Channel Configuration Card Number

2 - Installation

Table 2-4. Channel Configuration

Card

Number

1

2

3

4

1

1 - 8

65 - 72

129 - 136

193 - 200

2

9 - 16

73 - 80

137 - 144

201 - 208

3

17 - 24

81 - 88

145 - 152

209 - 216

Connector Number

	4			5
25	-	32	33	- 40
89	-	96	97 - 104
153	-	160	161	- 168
217	-	224	225- 232

6

41 - 48

105 - 112

169 - 176

233 - 240

7

49 - 56

113 - 120

177 - 184

241 - 248

8

57 - 64

121 - 128

185 - 192

249 - 256

Power connections on each Agilent E4374A card are through eight 37 pin D-subminiature connectors. These connectors allow for shielding and strain relief. Corresponding sense connections are also available on the connectors. Refer to Table 2-2 for information about ordering the mating connectors. As indicated in he table, mating connectors accept wire sizes from AWG 24 up to AWG 18, depending on the type of connector that you are using. You must wire up the mating connector to make your wire connections. Install the mating connector on the front of the Agilent E4374A card when complete. Refer to Appendix D for detailed pinout assignments of the front panel connectors.

If specific channels are not being used, you can configure them to be inactive. Inactive channels are open-circuited. Note that there are two ways to configure the channel outputs, each having different effects when the unit is powered on.

♦If you configure the channel outputs using the cfSetOutputConfig() function (see chapter 6), the settings are NOT saved in non-volatile memory. Each time you power up the unit, you must reprogram the settings.

♦If you configure the channel outputs using the Sequence setup page in the Agilent MCCD User interface (see chapter 4), the settings ARE saved in non-volatile memory. The unit will wake up with those settings when it powered up.

NOTE: If the mainframe has empty card slots, the channels that are normally reserved for those card slots will be treated as inactive channels.

Voltage Drops and Wire Resistance

NOTE: Each channel has a maximum of 5.5V and 2A available at the power connector.

At the rated output, the Agilent E4374A Charger/Discharger will tolerate up to a 0.5 volt drop in the load leads due to wire resistance, probe resistance, connector resistance, etc. Higher voltage drops will reduce the available voltage at the cell. Proper wiring design including using larger gauge wires and low-resistance fixture contacts can minimize voltage losses in the wiring and maximize the available voltage for charging the cells.

The length of the leads from the power connector to the cells is determined by how much voltage drop your system can tolerate. The voltage drop is directly determined by the wire, connector, and probe resistance (see table 2-5). Refer to Remote Sense Connections for more information.

To optimize performance and minimize the possibility of output instability and output noise, please observe the following guidelines:

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