the Cable length

[Gavy]

Dear Sir,
I have a question about the length of the cable between motor and module.
we want to use CAN contact 24 Pcs PD4-140-42-SE-CAN,the length of the cable between motor and module is about 50-60M. Could you tell me how could we choose the cable,for example,power and diameter of the cable?
Thanks in advances,

[Goeran Eggers (TRINAMIC)]

Dear Gavy,

the PD4-140-42-SE-CAN uses the TJA1050 CAN transceiver. Under worst case conditions minimum differential output voltage of the CAN transceiver for dominant level is 1.5V and minimum input voltage on CAN bus for dominant level is 0.9V. The CAN bus line should be terminated properly, 120 Ohm resistors at each end. A still valid differential signal (dominant level) therefore requires a current of 0.9V / 120 Ohm = 7.5mA througt the termination resistor at one end of the cable. This means cable resistance (including connector resistance etc. in-between) should be not more than (1.5V - 0.9V)/(2*7.5mA) = 40 Ohm for the mentioned 60m.