DIGIVEX Little Drive Servoamplifier
54
PVD 3530 GB 01/2005
5.1.6 Encoder emulation
Electrical characteristics
The electrical output interface meets standard RS422 for differential serial links. The circuit used
is a "LINE DRIVER" of the MC26C31D type. The electrical characteristics are therefore closely
related to the use of this component.
Short-circuit capability
A single output may be short-circuited at 0 V at any given time
Signal form
Signal levels:
U high
≥
2.5V for I high
≥
-20mA
U low
≤
0.5V for I low
≤
20mA
Switching time:
Rise or fall time defined from 10% to 90% of the magnitude in question, without cable and without
load.
tr = tf = 4ns (typical value)
Time delay between direct and complemented channels
Time delay defined at 50% of magnitudes in question without cable and without load.
-6ns
≤
ta
≤
6ns (maximum)
Time delay between channels A, B and the zero mark
Time delay defined at 50% of magnitudes in question without cable and without load.
-6ns
≤
td
≤
6ns (maximum)
This manual was downloaded on www.sdsdrives.com
+44 (0)117 938 1800 - [email protected]
