Canon R-1SO Instruction Manual page 6

Output circuit
4-3
Encoder Output
4-3-1
A,B-phase digital
Z-phase digital
Alarm output
4-2-2
LD monitor
Recommended receiving circuit
4-4
Encoder signal
4-4-1
A,B-phase
Z-phase
LD Alarm signal
4-4-2
LD Alarm
Comparator： 319 or equivalent
TC75S56F (Comparator)
680Ω
+5V
390Ω
to 74LS14 etc
A,B-phase digital out
Z-phase digital out
74LC03
LD alarm output
to 74LS14 etc
to 74LS14 etc
6