Descriptions of VACON® option boards vacon • 31
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
3
Jumper selections
On the OPTA5 board, there are four jumper blocks; X4 is used to program the control voltage
(auxiliary voltage), X2, X5 and X6 are set according the voltage of the encoder. The factory default
and other available jumper selections are presented below.
Jumper blocks X2, X5 and X6:
When these jumpers are set to High (default and typically good for 24V encoders), it means that
when the voltage at the channel goes above 8V, it will acknowledge a new pulse.
When they are set to Low = 2.3 V, it means that when the voltage at the channel goes above 2.3V, it
will acknowledge a new pulse.
Usage: Closed Loop Vector Control. The OPTA5 board is mainly used in conventional industrial
applications where encoder cable lengths are relatively long.
Encoder connection – Differential
Figure 14. HTL type encoder connection using differential inputs
24V
15V
24V
15V
High
Low
High
Low
Jumper block X4:
Auxiliary voltage level
Auxiliary voltage +24V Auxiliary voltage +15V
=
Factory default
Jumper blocks X2, X5 and X6:
encoder voltage level
7254.emf
GND
A-
B-
15V**
15V/24V from the OPT-A5-
board or from external supply*
OPT-A5
board
.
.
10 +15V/ +24V
9GND
1DIC1A+
2DIC1A-
3DIC2B+
4DIC2B-
5DIC3Z+
6DIC3Z-
7ENC1Q
8DIC1
.
.
*If external supply is used remember
to connect the ground of external
supply to terminal #9 of the OPT-A5
and to the enco der grou nd
**+1 5V/+24 V
Encoder
Tw i sted pa i rs
with own shield
A+
B+
DIC4
7255.emf