FANUC Series 16/18/160/180-Model C Connection Manual (Hardware)

B–62753EN/01
7. CONNECTION TO CNC PERIPHERALS
183
The power supply to the manual pulse generator is 5 VDC, same as for
the pulse coder. It is therefore necessary to prevent cable resistance from
causing the supply voltage to drop more than 0.2 V (total for both the 0
V and 5 V lines).
This is written as:
0.2 y
0.1 ³ R ³ 2L
m
0.1 : 0.1 A power supply current of the manual pulse generator
R : Resistance per unit length of the wire (/m)
m : Number of wires connected in each 0 V and 5 V line
L : Wire length (m)
This can be converted to the following equation:
L x
m
R
When A66L-0001-0286 cable is used:
This cable, developed for the FS16 pulse coder interface, consists of three
pairs of signal wires and six power line wires (20/0.18, 0.0394/m).
When three wires of this cable are used for 0 V and another three for 5 V,
the allowable cable length is calculated as follows:
L x
3
0.0394
+ 76.75[m]
This means that a power supply with a cable length of 50 m is still within
specifications.
Cable connection for the
Manual Pulse Generator

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