R: Resistance per unit length of the
m: Number of wires connected in each
0 V and 5 V line
L: Wire length (m)
7. CONNECTION TO CNC PERIPHERALS
Peel off the insulation sheath and cover with
a heat shrinkable tube
(2)Cable connection for the absolute pulse coder
Series 15–B employ the serial pulse coder, for which the power supply
5 VDC, same as for the conventional pulse coder. It is necessary to
suppless the cable resistance used for the power supply to 0.5 V or less
(total for both the 0 V and 5 V lines).
This is written as:
This can be converted to the
(a) When A66L–0001–0286 cable is used:
This cable, developed for the Series 15–B/16/18 pulse coder interface,
consists of three pairs of signal wires and six power line wires
(20/0.18, 0.0394 W/m). When this cable is used, the maximum cable
length is calculated as follows:
This cable has a diameter of 8.5 mm and is suitable for use with the
connector for Series 16 and 18 but cannot be extended up to 50 m.
(b)When A66L–0001–0157 cable is used:
This cable, specified as cable C in the connection manual (B–61393)
for Series 0, consists of five pairs of signal wires and six power line
wires (50/0.18, 0.016 W/m).
When this cable is used, the maximum cable length is calculated as
+ 46.87 [m]
This cable can be extended up to 46 m from an electrical point of view.
However, because of its 11 mm diameter, it does not fit very securely into
the cable clamp for Series 15–B.
It is therefore necessary to use a larger size connector at a terminal block or
peel off the insulation sheath at the end of the cable to reduce the diameter
so that it fits into the connector.