Vanguard RFD-200 S2 - Manual (Page 21)

REV 2 RFD-200 S2 USER’S MANUAL
18
3.4 Using the RFD-200 S2’s Timer in Single Input Mode
The RFD-200 S2’s timer can also be started and stopped with only the [TIMER START] input.
This feature is handy for measuring the time duration of the [TIMER START] input when it
changes states and then returns to the previous state as shown below:
This features works only with the DRY or WET mode of the [TIMER START] input.
To select the single input mode, press and hold the [TIMER STOP ARROW] key for 2
seconds. The following screen will be displayed momentarily:
Use the steps below to measure the time a relay contact remains open:
a. Press and hold the
[TIMER STOP ARROW]
key for 2 seconds to select Single Input
Mode.
b. Connect the [TIMER START] inputs to the relay’s (Normally Closed) contact.
c. Select DRY mode for the [TIMER START] input.
d. Select START-ON from the control mode area.
e. Energize the relay coil to open the relay’s Normally Closed contact. The RFD-200 S2’s
timer will start and the time will be displayed on the LCD screen.
f. De-energize the relay coil to close the relay contact. The RFD-200 S2’s timer will stop
and the time will be displayed on the LCD screen.
Trigger Mode Set
To Single Input