HEIDENHAIN PWM 20 - Manual (Page 219)

220 HEIDENHAIN ATS Software User's Manual
The permissible cable length for incremental encoders with HTL signals depends on the
scanning frequency, the effective supply voltage, and the operating temperature of the encoder.
The current requirement of encoders with HTL output signals depends on the output
frequency and the cable length to the subsequent electronics.
Switching times
(10 % to 90 %) t
+
/t  200 ns except UaS)
with 1 m cable and recommended input circuitry
Connecting cable
Cable length
Propagation time
HEIDENHAIN cable with shielding
e.g. PUR [4(2 x 0.14 mm
2 ) + (4 x 0.5 mm 2 )
max. 300 m (HTLs max. 100 m)
with distributed capacitance 90 pF/m
6 ns/m
<
zul_Kabell_HTL .eps