Remote Voltage Programming; External Voltage Programming Using Resistance; Figure 3-11. Remote Voltage Programming Using Resistance - Ametek SPS A Series Operation Manual

AMREL SPS-A Series

REMOTE VOLTAGE PROGRAMMING

3.5
Remote voltage programming configuration is used for applications that
require the output voltage be programmed (controlled) from a remote
source. An external resistance or external voltage source may be used
as a programming device. When using remote voltage programming, a
shielded, twisted-pair, hookup wire is recommended to prevent noise
interference with programming signals.

3.5.1 EXTERNAL VOLTAGE PROGRAMMING USING RESISTANCE

The resistance coefficient for remote voltage programming is 5k
ohms/100% of rated output voltage with respect to the VP RTN, J1-20.
The programming current from terminal J1-21 (VP-RES) is factory set to 1
milliampere. This yields a coefficient of 1.0% of rated output voltage for
each 50 ohms. If multiple switches or relays are used to program different
levels, make-before-break contacts are recommended.
Note: If an external resistance is used for remote programming, the
voltage programming return (VP RTN), terminal J1-20, must be
connected directly to or within ±3 volts (see note) of the power supply
common terminal, J1-24 See Figure 3-11 for connection requirements.

Figure 3-11. Remote Voltage Programming Using Resistance

M550129-01 Rev A
1
14
20 VP RTN
COM 6
21 VP RES
13 0-5 Kohms
PROGRAM
Operation
3-19