Elgar CW 1251M, Руководство по эксплуатации

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Elgar CW-M Series
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Phase slaves display their phase angle instead of frequency. The phase master
displays the system frequency.
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Each unit in the configuration monitors and displays its own load current. Voltage
is displayed only on the master; voltage is blanked out on the current slaves.
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Voltage of phase slaves can be adjusted independently of the master, from 0V
RMS to approximately 20% of full scale above the master (but not exceeding the
full-scale range).
5.2 Remote Control Signals
A nine-pin ‘D’ connector on the rear panel, marked EXT CONTROL, provides for the
application of DC voltage signals to control both the voltage amplitude and frequency of
the power supply’s output signal.
A 0V–5V signal has full scale control over either function. The effect of the external
analog control signal is additive with the setting of the function’s front panel control
setting. The combined effect is full scale limited. The impedance of the external analog
control inputs is 10k ohms, nominal.
Connect the voltage control signal to pin 1. Connect the frequency control signal to
pin 2. Pin 3 is the common return for all signals. See Figure 5–2.
Pin # Function
1 Analog voltage programming 0 to 5 VDC full scale
2 Analog frequency programming 0 to 5 VDC full scale
3 Analog ground common return for all signals
4–9 Reserved for future expansion
Figure 5–2 External Control Connector
Note: When programming voltage through the EXT CONTROL connector, the analog
frequency programming signal, if not used, must be tied to analog ground. When
programming frequency through the EXT CONTROL connector, the analog
voltage programming signal, if not used, must be tied to analog ground.
Failure to do so will not harm the unit, but changing either the programmed
voltage or frequency would alter the programmed value of the other.
On Pin 3, analog ground common must be held within 5 V DC of chassis.
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