Emerson Epsilon Eb Series Reference Manual page 45

Epsilon Eb and E Series EN Drives Reference Manual
Output driver requirements:
15 mA sinking (open collector)
5 volt capacity
Signal common connected to Drive Logic 0V (Sync Encoder Common 0V)
ECI-44 terminal
NC2
NC1
Pulse / : Commands motion on the falling edge (active edge).
Direction: Positive (+) motion when high (inactive) and Negative (-) motion when low
(active).
Pulse CW / : Commands positive (+) motion on the falling edge (active edge) of a pulse.
Pulse CCW /: Commands negative (-) motion on the falling edge (active edge) of a pulse.
A and B : Encoder Quadrature signal interpretation. When B leads A Positive (+)
motion commands will be generated, When A leads B, negative (-) motion
commands will be generated.
Note
Actual motor rotation direction will depend on pulse ratio polarity and setting of the
Positive Direction bit.
Pulse/Direction Interpretation
In Pulse/Direction interpretation, pulses are received on the A channel and the direction is
received on the B channel. If the B is high, pulses received on the A are interpreted as positive
changes to the Pulse Position Input. If the B is low, pulses received on the A are interpreted
as negative changes to the Pulse Position Input.
Figure 22: Pulse/Direction Signals, Differential Inputs
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Command Pulse-Direction
Connector Pin # Signal
20 Pulse /
36 Direction
Pulse-Pulse Pulse Quadrature
Signal Signal
Pulse CW / A
Pulse CCW / B