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2 - Installation
26
Table 2-4. Channel Configuration
Card Connector Number
Number 1 2 3 4 5 6 7 8
1
1 - 8 9 - 16 17 - 24 25 - 32 33 - 40 41 - 48 49 - 56 57 - 64
2
65 - 72 73 - 80 81 - 88 89 - 96 97 - 104 105 - 112 113 - 120 121 - 128
3
129 - 136 137 - 144 145 - 152 153 - 160 161 - 168 169 - 176 177 - 184 185 - 192
4
193 - 200 201 - 208 209 - 216 217 - 224 225- 232 233 - 240 241 - 248 249 - 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: