
1 - FUNCTIONAL
This card replace one conventional motorized potentio-
meter in "MANU" mode and sets the "MANU" channel
output always equal to the "AUTO" one to allow the
smooth switching between the "AUTO" and "MANU" ope-
ration at any load (follower in "AUTO" mode).
- Switch between the two modes is made by the external
"AUTO / MANU" order (terminals 47,48)
- Jumps SW1 allows the choice between voltage output
taken from U/F control of the sensing card or from a 5V
fixed reference and the range is adjusted by means of
potentiometer P03.
- Jumps SW3 and SW4 must be open for normal opera-
tion and closed for follower operation.
- Speed of the adjustment is controled by potentiometer
P01 in manual setting and by P02 in follower operation.
P02 acts as a delay between an "AUTO" output variation
and the "MANU" output response.
- Two LED's (L1,L2) indicate the command or -
and two other LED's (L3,L4) indicates the maximum and
minimum position of Ifield settings
NOTE : When this card is fitted, the internal Ifield
setting (P02 of manual mode card) must be set to 0
or under the no load field value and an external
setting potentiometer must not be used. The Ifield
setting is made only by mean of push-buttons on
terminals 44, 45, 46.
2) ADJUSTMENTS
- P1
: Clock speed (Time delay in follower mode)
- P2
: Clock speed (range time in "MANU" mode)
- P3
: Ifield range value
- SW1
: Voltage range fixed or U/F monitored
- SW3/4 : Normal (open) or follower (closed) operation
3 - INPUTS / OUTPUTS
Flat cable (BUS 64points)
- 23c
: Cmd lower
- 22a
: Cmd upper
- 25a
: Cmd "AUTO / MANU"
- 11a
: U/F voltage reference
- 16c
: If reference set point input
- 15a
: If reference set point input "MANU" channel
- 27c
: Ifield setting output to Manual mode card
- 30a
: Maximum position of settings
- 1a,1c
: +15Vdc regulated (Vcc)
- 32a,32c : -15Vdc regulated (Vdd)
- 16a,17c : Common ground (GND or 0V)
37
Digital pot Ifield
Optional card
AVR
Model R630
NT1950115/a-01/94 f:1/3