Instructions

78
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 limit 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 Front Panel Menu Subsystem Level.
Subsystem
Level
Display
Function
Level
Display Parameter Level Display Description
SET
set
Voltage limit
source
OT
Front Panel (Digital)
F
. AN
Parameter settings in Analog/
Digital control mode, Voltage
channel.
Ext. Voltage
E
. O
Ext. Resist.
E
. RES
Current limit
source
CvRR
Front Panel (Digital)
F
. AN
Parameter settings in Analog/
Digital control mode, Current
channel.
Ext. Voltage
E
. O
Ext. Resist.
E
. RES
Source and
monitor range
RNG
5/10 (V/KΩ) range
5
Control by external Voltage/
Resistor, Range 5/10
Table 6-1: MENU. Analog Programming Setting
CAUTION:
COM (J1-7,9) and VPGM_RTN (J1-12) terminals of J1 are connected 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 Control
Contact J1-1 (Fig.4-3, item 1) accepts TTL signal or Open-Short contact (Referenced to J1-7,9) to
select between Local or Remote Analog programming of the output voltage and current limit. In
Local mode, the output voltage and current limit can be programmed via the front panel Voltage
and Current encoders or via the Communication interface. In Remote Analog mode, the output
voltage and current limit can be programmed by analog voltage or by programming resistors via
J1 contacts 6 and 5. Refer to Analog Programming Setting Table 6-2.
6.3 Local/Remote Analog Indication
Contact J1-4 (Fig.4-3, item 4) 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 low state. J1-4 signal will be low if J1-1 is low and at least one of Analog
control modes are selected. Refer to Analog Programming Setting Table 6-2.
J1-1 LOC/REM SELECT Front Panel selection Front Panel selection J1-4 LOC/REM MON
OPEN
”1”
Not applicable Not applicable Open
TTL ”0” or Short
F
. AN F . AN
Open
E
. O or E . RES
F
. AN
0~0.6V

. AN
E
. O or E . RES 0~0.6V
E
. O or E . RES E . O or E . RES 0~0.6V
Table 6-2: Local/Remote Analog Control and Indication