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198-1603-03 Rev 01
5.6. Analog Card Connections (Optional 138-0471-XX Card)
Rectifiers which have optional analog control will be equipped with the
138-0471-xx
card and
require customer supplied wiring. See the wiring diagram figures below for connection information.
The following give a description of the control and read back signals on the 12 pin terminal strip.
VOLTAGE CONTROL (VC)
Control of the power supply output voltage can be achieved by connecting the appropriate signal
to pins 6 (+) and 5 (-).
CURRENT CONTROL (CC)
Control of the power supply output current can be achieved by connecting the appropriate signal
to pins 8 (+) and 7 (-).
VOLTAGE READBACK (VRB)
Monitoring of the power supply output voltage can be achieved by connecting the appropriate
sensing circuitry to pins 9 (+) and 10 (-).
CURRENT READBACK (CRB)
Monitoring of the power supply output current can be achieved by connecting the appropriate
sensing circuitry to pins 11 (+) and 12 (-).
Pin 3 can be used for a DC COMMON connection.
Pin 1 can be used as a connection point for the cabling shields.
NOTE:
To reduce the possibility of electrical noise interfering with the proper operation of the
control system, use shielded twisted pair for all wiring between the analog controller and the
power supply. Belden™ 8761 or equivalent cable type is recommended.
NOTE:
The shielding for the voltage & current control lines should be earth grounded at the
controller and should be cut-off at the power supply. The shielding for the voltage & current read
back lines should be earth grounded at the power supply (pin 1 - SHIELD) and cut-off at the
controller. See diagrams below.
NOTE:
When using 4-
20mA control, the controller’s input channels must be isolated from each
other. It is recommended that isolated receivers (ex. OPTO 22 AD3T or equivalent) be used with
the curr rd out and volt rb out transmitter channels. These transmitter channels are self powered.
The receiver inputs and transmitter outputs are ground isolated from the power supply’s
DC common and are isolated from earth ground as well. However, be aware that both
input channels and both output channels of the AI board, do share a common signal
ground. In other words, there is no isolation from channel to channel or receiver inputs
to transmitter outputs except that provided by the differential inputs. A common ground
signal from the analog controller is required.
NOTE:
MAXIMUM LOOP RESISTANCE THAT CAN BE IN SERIES BETWEEN THE (+) AND (-)
OF THE CURRENT OR VOLTAGE READBACK IS 400 OHMS