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3. ELECTRICAL INSTALLATION 33
Inputs Depending Upon the State of System Variable EI
Connector Pin
X4
EI=0
EI=1
EI=2
12
STEP+
CW+
A+
7
STEP-
CW-
A-
13
DIR+
CCW+
B+
8
DIR-
CCW-
B-
Outputs Depending Upon the State of System Variable EO*
Connector Pin
X4
EO=0
EO=1
EO=2
14
STEP+
CW+
A+
9
STEP-
CW-
A-
15
DIR+
CCW+
B+
10
DIR-
CCW-
B-
*Requires encoder feedback input on X2
Differential Analogue Input
The ViX stepper drive can accept a differential analogue input for use with the FRATE
command. The input circuit, shown in Figure 3-12, can interface to an ex/-10V
differential signal. Analogue to digital conversion (12-bit resolution) converts the analogue
input to a digital value for use within the drive. Read the value of the analogue input as a
count via system variable AI.
+
-
ANA1-
ANA1+
Input
impedance
200K
Drive
AI, analogue
input expressed
as a count
Software offset controlled
by system variable AO
A to D
Note: both inputs must
be connected - cannot
be used as a single ended
input
0V
GND
Figure 3-12. Analogue Differential Input
Summary of Contents for ViX250IM
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