70
83507013 Rev G
6 REMOTE ANALOG PROGRAMMING
6.1 Introduction
The rear panel connector J1 allows the user to program the power supply Output Voltage
and Current with an analog device. J1 also provides monitoring signals for Output Voltage
and Output Current. The programming range and monitoring signals range can be selected
between 0-5V or 0-10V using the setup switch SW1. When the power supply is in Remote
Analog programming mode, the serial communication port is active and can be used to
query the power supply settings.
CAUTION
COM (J1-12), VPGM_RTN (J1-22) AND IPGM_RTN (J1-23) terminals of J1 connect
internally to the –Sense potential (-S). Do not connect these terminals to any
potential other than –Sense (-S), as it may damage the power supply.
6.2 Local/Remote Analog Indication
Contact 8 of J1 (Fig. 4-2, Item 5) accepts TTL signal or Open-Short contact (referenced to
J1-12) to select between Local or Remote Analog programming of the Output Voltage and
Current.
In Local mode, the Output Voltage and Output Current can be programmed via the front
panel VOLTAGE and CURRENT encoders or via the RS232/RS485 port. In Remote Analog
mode, the Output Voltage and current can be programmed by analog voltage or by
programming resistors via J1 contacts 9 and 10 (refer to Sections 6.4 and 6.5). Refer to
Table 6-1 for Local/Remote Analog control (J1-8) function and Setup switch SW1-1, 2
settings.
Output Voltage/
Current setting
Table 6-1: Local/Remote Analog control function
6.3 Local/Remote Analog Indication
Contact 21 of J1 (Fig. 4-2, Item 5) is an open collector output that indicates if the power
supply is in Local mode or in Remote Analog mode. To use this output, connect a pull-up
resistor to a voltage source of 30Vdc maximum. Choose the pull-up resistor so that the sink
current will be less than 5mA when the output is in a low state. Refer to table 6-2 for J1-21
function.
Table 6-2: Local/Remote Analog indication
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