83-507-013 Rev. A
45
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 termi-
nals to any potential other than –Sense (-S), as it may damage the power
supply.
CHAPTER 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 commu-
nication port is active and can be used to query the power supply settings.
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 se-
lect 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 (re-
fer 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.
SW1-1, 2 setting
J1-8 function
Output Voltage/
Current setting
Down (default)
No effect
Local
“0” or Short
Remote
Up
“1” or Open
Local
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.
J1-8 SW1-1
SW1-2
J1-21
signal
Mode
Down
Down
Open
Local (FP)
Down Up 0
i
0.6V Remote
Analog
Up Down
0
i
0.6V Remote
Analog
TTL “0” or short
Up Up
0
i
0.6V Remote
Analog
TTL “1” or open
Down or Up
Down or Up
Open
Local (FP)
Table 6-2: Local/Remote Analog indication
