AMETEK SGA Series - Manual (Page 70)

Operation Sorensen SGA Series
3-20 M550129-01 Rev AG
3.6 REMOTE VOLTAGE PROGRAMMING
Remote voltage programming configuration is used for applications that
require the output voltage to 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 to
programming signals.
3.6.1 REMOTE VOLTAGE PROGRAMMING BY RESISTANCE
The resistance-programming coefficient for output voltage is
(100% rated output voltage) /
5 kΩ, with input at Pin J1-21 (VP RES) and
return to Pin J1-20 (VP RTN). An internal current source, factory-set at
1 mA, from Pin J1-21 (VP RES) is utilized to drive the resistance. This
produces a transfer function for output voltage, as follows:
Vout = R * (100% rated output voltage) / 5 kΩ), with R in ohms.
Note:
If an external resistance is used for remote programming, the
voltage programming return Pin J1-20 (VP RTN) must be connected directly
to, or within ±3 V, of the circuit common, Pins J1-6 and J1-24. See Figure
3-15 for connection requirements.
1
13
14
20 VP RTN
21 VP RES
COM 6
0-5 Kohms
PROGRAM
Figure 3-15. Remote Voltage Programming Using Resistance