Vanguard RFD-200 S3 User Manual

Page 10

RFD-200 S3 USER’S MANUAL

REV 1

2.0 FUNCTIONAL

DESCRIPTION

2.1

RFD-200 S3 Auxiliary Power Supply

The RFD-200 S3 provides 3 auxiliary power supplies (24 Vdc, 48 Vdc, and 125 Vdc) for powering
electronic relays. Each power supply is fuse-protected. The power supply outputs are controlled
by the auxiliary power supply

[ON/OFF]

button. The LED next to the

[ON/OFF]

button is

illuminated when the power supply output is turned on.

Only one auxiliary power supply can be selected at a time. The

[PWS SELECT]

button (item

21 in Figure 1) is used to select the power supply. The active power supply is indicated by an
illuminated LED above the corresponding voltage label.

2.2

RFD-200 S3 Current and Voltage Sources

The RFD-200 S3 front panel offers three AC current source terminals (100A, 40A, 10A). Only one
current source should be used at a time. The

[METER SELECT]

button is used to select

whether to display the current generated by the RFD-200 S3 or the current input at the

[EXT

INPUT CURRENT]

terminals. The

[RFD-200 CURRENT]

LED will be illuminated when an

internal RFD-200 current source is in use and the output current is displayed on the LCD. The
internal current is labeled as “Int I:” on the LCD screen as shown below:

Two isolated voltage sources are also available, one 0-250 Vac and one 0-300 Vdc. Both the
current and voltage sources are controlled by the

[OUTPUT CONTROL]

knob .

0mS 0.0CY

V Mtr: -0.003 V
Int I: 0.080 A

Ext I: -0.001A

Internal Current