American Magnetics 12200PS DC Power Supply (CE-Marked) - Manual (Page 52)

OPERATING MANUAL REMOTE OPERATION
Release 1.0 (98/07) 4-7
4.5 Using the Isolated (ISOL) Programming Interface Option
The 4-channel Isolated (ISOL) Programming Interface allows remote programming and readback of the power
supply output voltage and current limit using 0-5V analog signals that are not referenced to the power supply's
internal ground. The isolation amplifiers used are rated to 1000Vdc. With ISOL installed, the power supply will
no longer support resistive programming, or, 0-10V programming or readback. Any non-programmed function
(either voltage or current limit) can still be controlled via the power supply's front panel.
4.5.1 ISOL Specifications
Table 4.5-1 Isolated (ISOL) Programming Interface Specifications
Characteristics Minimum Typical Maximum Unit
Gain: Nominal Gain
Gain Error
Gain vs Temperature
Non Linearity –
–
–
– 1
±0.04
-0.02
±0.08 –
±0.03
-0.06
±0.25 V/V
% FSR
%/°C
% FSR
Input: Offset Voltage
Input vs Temperature
Voltage Range
Resistance –
–
0
– ±20
±25
–
49 ±50
±100
5
– mV
µ
V/°C
V
k
Ω
Readback: Voltage Range
Current Drive
Load Capacitance
0
±5
– –
±15
– 5
–
1 V
mA
µ
F
4.5.2 ISOL Setup and Operating Instructions
CAUTION
In order to maintain isolation, do not connect either rear panel connector J2
terminal 3 (control ground) or the supply return to J2 terminals 5, 7, 9, or 11
(program/monitor signal returns).
1. Ensure that the power supply rear panel SW1 switches 3, 4, 5, and 6 are set for 0-5V programming and
monitoring (Section 4.2).
2. Connect the 0-5V programming source or the monitor lines to the J2 connector on the power supply’s
rear panel as described in Table 4.5-1. Note: With ISOL installed, J2 connector terminals 5, 7, and 9
are disconnected. Use J2 connector terminal 11 for programming and monitoring return connections.
3. Once the connections are made, use the power supply with the ISOL interface installed as you would
use a power supply with a 0-5Vdc programming source. The only differences are that the programming
and monitoring sources are now isolated and that resistive and 0-10V programming as well as 0-10V
monitoring are disabled. All front panel functions are as usual.
Table 4.5-1 J2 Programming and Monitoring Connections with ISOL Interface
Voltage Program
(VPGM) Current Program
(IPGM) Voltage Monitor
(VMON) Current Monitor
(IMON)
Program Signal J2-6 J2-8 J2-10 J2-12
Return J2-11 J2-11 J2-11 J2-11
4.5.3 ISOL Calibration
To calibrate a unit which has the ISOL Interface installed, the service technician follows the standard procedures
in Section 5. Calibration.