Pl22 - Sony Digiruler PL21 Instruction Manual

PL22

10 µm/20 µm/50 µm/100 µm
Resolution
Minimum phase difference (Tw)
PL22-3F, AF: 2.5 µsec/5 µsec/10 µsec/20 µsec
Minimum repeat cycle (Tw)
PL22-3U, AU: 2.5 µsec/5 µsec/10 µsec/20 µsec
Note 2
Output signal
PL22-3F, AF
PCA
＊PCA
PCB
＊PCB
PL22-3U, AU
PCU
＊PCU
PCD
＊PCD
Note 1
The PL22-3U, AU is always receive Up/Down output with the Up/Down counter. Accurate
measurement cannot be obtained if only one output is used.
Alarm signal If the scale exceeds the maximum response speed
Note 1
(See P.19)
Alarm clearing To reset the alarm, remove all the causes of the
Reset
Note 2
The displacement is detected about every 100 µs to generate pulses corresponding to the
displacement of the scale or head.
As the A/B output or Up/Down output signal, unlike common rotary encoder, is artificially
generated, it is sometimes output at the present pulse width (Tw) even when the scale
movement is slow. It is necessary to use a receiving circuit that can receive the present
pulse width.
or if a head cable connection becomes open, an
alarm is triggered. When an alarm is triggered, the
ALARM output goes high (the *ALARM output goes
LOW). At this time, the output signal becomes
entrirely high impedance.
alarm and perform a reset or remove power and
apply power once again.
With the alarm triggered, if the external reset is
begin applied, the alarm signal will not be output
and outputs will not go into the high-impedance
state. However, the output signals will be stopped.
To perform a reset, short pins 20 and 7 of the
output connector.
External reset signal input
Maximum reset time: 300 ms
Maximum short-circuit current: 0.5 mA
Maximum operation reset time: 10 ms
(after the reset is canceled)
External reset signal input circut
P20:RES
P7:GND
27