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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 setup switch SW1. When the power supply is in Remote Analog programming, the serial
communication port is active and can be used to read the power supply parameters.
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 CONTROL
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 limit.
In Local mode, the output voltage and current limit can be programmed via the front panel VOLTAGE
and CURRENT encoders or via the RS232/485 port. In Remote Analog mode, the output voltage
and current limit can be programmed by analog voltage or by programming resistors via J1 contacts
9 and 10 (refer to sec. 6.4 and 6.5). Refer to Table 6-1 for Local/Remote Analog control (J1-8)
function and Setup switch SW1-1, 2 setting.
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 low state. Refer to Table 6-2 for J1-21 function.
Table 6-1: Local/Remote Analog control function
Table 6-2: Local/Remote Analog indication
SW1-1,2 setting
Down (default)
Up
J1-8 function
Output voltage/
Current setting
No effect
"0" or Short
"1" or Open
Local
Remote Analog
Local
TTL "0" or short
TTL "1" or open
SW1-1
SW1-2
J1-8
J1-21 signal
Down
Down
Up
Up
Down or Up
Down
Up
Down
Up
Down or Up
Open
0~0.6V
0~0.6V
0~0.6V
Open
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CAUTION
To maintain the isolation of power supply and prevent ground loops, use an
isolated programming source when operating the power supply via remote
analog programming at J1 connector.
6.4 REMOTE VOLTAGE PROGRAMMING OF OUTPUT VOLTAGE AND CURRENT LIMIT
SW1-3 setting
UP
DOWN
Output Voltage programming
VPGM (J1-9)
0-10V
0-5V
Current limit programming
IPGM (J1-10)
0-10V
0-5V
Table 6-3: SW1-3 setting and programming range
1
14
13
25
10
12
8
9
23
22
+
-
+
-
CURRENT LIMIT
PROGRAMMING
OUTPUT VOLTAGE
PROGRAMMING
J1 connector, rear panel view
Fig.6-1: Remote voltage programming connection
Perform the following procedure to set the power supply to Remote Voltage programming :
1. Turn the power supply AC On/Off switch to Off.
2. Set setup switch SW1-1 to its UP position for output voltage external programming and
SW1-2 to its UP position for Output Current limit external programming.
3. Set SW1 position 3 to select programming voltage range according to Table 6-3.
4. Ensure that SW1 positions 7 and 8 are at their Down (default) position.
5. Connect a short between J1-8 and J1-12 (refer to Table 4-4).
6. Connect the programming source to the mating plug of J1 as shown in Fig.6-1. Observe
correct polarity for the voltage source.
7. Set the programming sources to the desired levels and turn the power supply ON. Adjust the
programming sources to change the power supply output.
1. SW1 positions 4,5,6 and 9 are not required for remote programming. Their setting can be
determined according the application.
2. The control circuits allow the user to set the output voltage and current limit up to 5% over
the model-rated maximum value. The power supply will operate within the extended range,
however it is not recommended to operate the power supply over its voltage and current
rating and performance is not guaranteed.
NOTES:
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Summary of Contents for Genesys GENH6-100
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