Figure 3.8
:
Remote programming by External Resistance, Current Mode
CAUTION
An opening in the remote programming circuit is effectively a high
programming resistance and will allow an uncontrolled current rise exceeding
the maximum output of the power supply. This may cause possible damage to
the power supply and/or load. For this reason, any programming resistor
switcher must have shorting contacts. This type of shorting switch connects
each successive position before disconnecting the preceding one.
B.
External DC Voltage:
To program the output from zero to full rated current, configure the strapping connections on
TB1/J1 as shown on Figure 3.9a. A signal from a higher potential source may be attenuated
to the 100mV level by a resistor divider. For best performance, the source impedance of this
divider should not exceed 1000 Ohms. (May not be needed for the 0-5V or 0-10V
programming options).
1. Remove the jumpers between terminals TB1/J1-9, TB1/J1-10 and TB1/J1-11.
2. If unit has the 0-5V or 0-10V programming options, connect a link between TB1/J1-11
and TB1/J1-12 as shown in Figure 3.9b. Otherwise, if the unit has the default
(0-100mV) programming , connect as shown in Figure 3.9a.
3. Connect the programming voltage source between terminals TB1/J1-10 (positive) and
TB1/J1-12 (negative).
NOTE:
Apply the appropriate programming voltage. Do not apply 0-5V or 0-10V
programming to a unit that has the default (0-100mV) programming. The Voltage source
must be isolated from the EMS “V-” terminal.
Figure 3.9a: Remote Programming by External Voltage, Current Model
83-473-000 Revision J
3 - 8
Operating Instructions
