
B-63943EN/02 8.CONNECTION TO FANUC I/O Link
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NOTE
The number of connectable manual pulse
generators depends on the type and option
configuration.
8.4.16 Cable Length for Manual Pulse Generator
Like a pulse coder, the manual pulse generator operates on 5 VDC.
The supply voltage drop due to the cable resistance must be held
below 0.2 V (when those of the 0-volt and 5-volt wires are combined),
as expressed in the following expression:
0.1×R×2L
where
0.1 = manual pulse generator supply current (0.1 A)
0.2≥
m R = resistance per unit cable length (Ω/m)
m = number of 0-volt and 5-volt wires
L = cable length (m).
Therefore, the cable length can be determined using the following
expression.
m
L≤
R
In the case of the A66L-0001-0286 cable, for example, when three
pairs of signal
wires and six power supply wires (20/0.18, 0.0394 Ω/m) are used
(three power supply wires connected to 5 V and the other three to 0 V),
the cable length is:
3
L≤
0.0394
=76.75[m]
However, the maximum pulse transmission distance for the manual
pulse generator
is 50 m. Taking this into consideration, the cable length may be
extended to:
38.37 m (when two generators are used), or
25.58 m (when three generators are used).