Magnescale DK812A Series, Instruction Manual

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(E)
5
5. Measuring unit output signals
The signals output from this measuring unit are phase A/B/Z signals in the form of voltage-
differential line driver output compliant with EIA-422.
The reference point is the synchronized reference point that is at Hi level when the phase A
and phase B are at the Hi level.
DK800A output signals at maximum DK800B output signals at maximum
response speed (at approx. 80 m/min) response speed (at approx. 42 m/min)
Before using, check that the minimum input phase difference of the control device connected
to this measuring unit or the counter is smaller than 50 ns for the DK800A (phase A cycle:
200 ns, 5 MHz) or smaller than 100 ns for the DK800B (phase A cycle: 400 ns, 2.5 MHz).
* The minimum phase difference can be modified under special specifications. (See “5-1.
Output signal phase difference”)
5-1. Output Signal Phase Difference
The travel amount of the measuring unit is detected every 50 ns for the DK800A and every
100 ns for the DK800B, and the phase difference proportional to the amount traveled is
output. The phase difference changes in integer multiples of 50 ns or 100 ns.
Also, the minimum phase difference for the phase A and phase B is 50 ns for the DK800A
and 100 ns for the DK800B.
Phase A
Phase B
50 ns
200 ns (5 MHz)
Phase A
Phase B
100 ns
400 ns (2.5 MHz)
Phase A
Phase B
Integer multiple of
50 ns or 100 ns
Phase A
Phase B
Phase Z