Remote Voltage Sensing
Figure 2-4B shows the wiring for remote sensing. There is a switch on the output connector that selects either local or remote sensing of the output voltage. To configure the output for remote sensing, do the following:
■Connect sense leads to the load
■Make certain that the connector switch is set to REMOTE
Note | If you leave the connector switch in LOCAL, the power module will regulate the programmed voltage at |
| the connector, not at the load. |
Because they do not carry load current, you may use smaller gauge wire for the remote sense leads.
Be careful to avoid open circuits in the sense leads, such as leaving the output connector sense switch in the Local position. If this happens, the power module will regulate at its output terminals instead of at the load.
Note | If the sense terminals are left open, the voltage at the output terminals will increase approximately 3 to 5% | |
| over the programmed value. The readback voltage will not indicate this increase because readback is | |
| measured at the sense terminals. | |
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Figure 2-4. Load Connection
The dashed lines in the connection drawings illustrate remote sense connections. In this case, the remote sense terminals of the power module are connected to the load rather than the output terminals. This allows the power module to automatically compensate for the voltage drop in the load leads as well as to accurately read back the voltage at the load. In
Voltage Readback
In remote sense applications, the voltage readback occurs directly at the load. This allows the power module to automatically compensate for the voltage drop in the load leads and to provide an accurate voltage readback directly across the load.
