Omron SYSMAC CJ Series User Manual page 61

High-speed Counter Input Specifications (IN06 to IN09 and IN16 to IN19)
Phase-A/Phase-B encoder input, Single-phase
60-kHz pulse input with 50% duty ratio
ON
50%
OFF
Phase-A/Phase-B encoder inputs, Differential
Set to
phases, 30 kHz
60 kHz
ON
50%
OFF
ON
50%
OFF
Phase-A/Phase-B encoder input, Single-phase
100-kHz pulse input with 50% duty ratio
ON
50%
OFF
Phase-A/Phase-B encoder inputs, Differential
Set to
phases, 50 kHz
100 kHz
ON
50%
OFF
ON
50%
OFF
Phase
ON
Z/reset
input
50%
OFF
Additional Information
For the counter inputs, it is necessary to check the factors that can affect the pulses, such as the type of output driver
in the encoder, cable length, and count pulse frequency. When counting pulses that exceed 60 kHz, we recommend
using an encoder with a line-driver output. To ensure that pulses can be counted stably, use a shielded twisted-pair
cable and keep the cable to 3 m or less in length.
CJ2M CPU Unit Pulse I/O Module User's Manual
3 I/O Specifications and Wiring for Pulse I/O Modules
24-VDC input
Rise time and fall time: 3.0 µs max.
16.6 µs min.
8.3 µs min.
8.3 µs min.
3 µs max. 3 µs max.
Changes in phases A and B must be
separated by at least 4.0 µs.
33.3 µs min.
T1 T2 T3 T4
T1, T2, T3, T4: 4.0 µs min.
Rise time and fall time: 2.5 µs max.
10.0 µs min.
5.0 µs min. 5.0 µs min.
2.5 µs max. 2.5 µs max.
Changes in phases A and B must be
separated by at least 2.5 µs.
20.0 µs min.
T1 T2 T3 T4
T1, T2, T3, T4: 2.5 µs min.
Encoder input phase Z (IN02/IN03 or IN12/IN13)
Maintain an ON time of 30 µs min.
and an OFF time of 150 µs min.
150 µs min.
30 µs min.
Line driver input
Encoder input phase A or B, single-phase
60-kHz pulse input with 50% duty ratio
16.6 µs min.
8.3 µs min. 8.3 µs min.
ON
50%
OFF
Phase-A/Phase-B encoder inputs, Differential
phases, 30 kHz
Changes in phases A and B must be separated by at least
4.0 µs.
33.3 µs min.
ON
50%
OFF
ON
50%
OFF
T1 T2 T3 T4
T1, T2, T3, T4: 4.0 µs min.
Single-phase 100-kHz pulse input with
50% duty ratio
10.0 µs min.
5.0 µs min.
5.0 µs min.
ON
50%
OFF
Differential-phase 50-kHz pulse input
Changes in phases A and B must be separated
by at least 2.5 µs.
20.0 µs min.
ON
50%
OFF
ON
50%
OFF
T1 T2 T3 T4
T1, T2, T3, T4: 2.5 µs min.
Encoder input phase Z (IN02/IN03 or IN12/IN13)
Maintain an ON time of 30 µs min.
and an OFF time of 150 µs min.
30 µs min. 150 µs min.
ON
50%
OFF
3
3-3