Hardware Features
MN1258V4 08/2000
21
The outputs are buffered by op-amps suitable for driving a load resistance of
≥
10k
Ω
, and are
brought out on the front panel. When connecting to a drive it is recommended that screened/shielded
twisted pair cable is used, with the demand signal twisted with
agnd
. This in turn should be
connected to the demand 'minus' input of the drive. The screen/shield should be connected to chassis
earth/ground at one end only.
Figure 3-10: Analogue Output Buffer
Associated MINT keywords are:
DACLIMITMAX, DAC, DACMODE, DACOFFSET
3.6 Encoder
Interface
Up to five incremental encoders may be connected to the controller (four axis encoders and a master
encoder). These encoders must provide complementary signals. The input circuit is a differential
line receiver with open circuit protection and 120
Ω
termination. Each encoder channel has
chA
,
chB
and
index
plus their complements. The encoders should be powered from
+5V
, and are
referred to the controller GND.
If the encoders require more than 650mA total, some of them (or all) must be powered from an
external 5V supply. This additional supply must NOT be connected to the NextMove BX
5V
supply.
The encoders are the position sensors used by the controller to measure axis position and consist of
two pulse trains, 90 degrees out of phase. The controller uses the phase difference to determine
direction of motion and counts the encoder edges to determine position. The frequency of these
counted edges reflects the motor velocity.
The four axis encoders are labeled
AXIS 0
to
AXIS 3
and the master speed/position encoder is
labeled
AUXILIARY
.
Summary of Contents for NextMove BX
Page 1: ...MN1258V4 08 2000 NextMove BX Installation Manual for Mint v4 Issue 4 0...
Page 2: ...NextMove BX Installation Manual for Mint v4 ii MN1258V4 08 2000...
Page 4: ...NextMove BX Installation Manual for Mint v4 iv MN1258V4 08 2000...
Page 8: ...NextMove BX Installation Manual for Mint v4 viii MN1258V4 08 2000...
Page 12: ...NextMove BX Installation Manual for Mint v4 xii MN1258V4 08 2000...
Page 18: ...NextMove BX Installation Manual for Mint v4 6 MN1258V4 08 2000...
Page 22: ...NextMove BX Installation Manual for Mint v4 10 MN1258V4 08 2000 Figure 3 3 Board Settings...
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