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7.2.
Isolated Analog Programming (INA option)
The INA option features galvanically isolated analog voltage/current programming/readback,
and digital control/readback connections. Signals are isolated using fiber optics. The
Accuracy, Linearity, Temperature coefficient and Stability specifications are limited to
±0.01% when programming via the isolated analog interface. If the unit is equipped with
floating return, the isolated analog interface should be specified.
The interface pin connections are similar to the ANA interface except the front panel
potentiometer wipers (pins 4 and 5) are not connected. Details are shown in Table 6 below.
Pin
Signal
Name
1
CC LED
2
CV LED
3
I-MON
4
N/C
5
N/C
6
Digital
Ground
7
POL-SET
8
V-SET
9
Analog
Ground
10
+10V
11
V-MON
12
HV ON
13
POL-
Status
14
N/C
15
I-SET
Remote operation via the INA interface is the same as the ANA interface. Note that the
control modes described in sections 7.1.2 through 7.1.4 cannot be used.
I/O
Description
O
+15V through 10k when unit is operating in Constant Current mode
O
+15V through 10k when unit is operating in Constant Voltage mode
O
Analog output current monitor signal, scaled 0-10V=0-100% rated
current. Series resistance is 11k
Not connected
Not connected
Ground for digital circuits, Isolated from chassis to 2,000V
I
Polarity set signal for units equipped with optional electronic polarity
reversal. Open=positive polarity, connected to digital ground=negative
polarity.
I
Output voltage set point, scaled 0-10V=0-100% rated voltage.
Resistance to ground approx. 10M
Analog ground, Isolated from chassis to 2,000V
O
+10V reference, 2mA max.
O
Analog output voltage monitor signal, scaled 0-10V=0-100% rated
voltage. Series resistance is 11k
I
Open=HV OFF, Connect to digital ground=HV ON
O
Output Polarity indicator for units equipped with optional electronic
polarity reversal. +12V=Positive, 0V=Negative.
Not connected
I
Output current set point, scaled 0-10V=0-100% rated current.
Resistance to ground approx. 10M
Table 6. Isolated Analog Interface Signals (INA option)
83550001 Revision C
28
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