© 2020 Van Putten Instruments BV | MAN-VP-V-UK | Revision: 2000 | Date: 29-7-2020
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9.2
Cables for VPVision
All electrical installations to be carried out by authorized electrical installation engineers
only.
Ethernet
For Ethernet, Cat5e cable with 4 twisted pairs must be used. For some applications, a higher quality
cable might be needed. In case of any doubt, It is best to consult the site on their existing cables to
make sure that the VPVision cables match the prescribed standards. The cable should match the
power budget of all connected sensors. Long cables will result in increased cable resistance, which
might cause issues when not properly addressed.
RS485 Modbus
For RS485 networks, cable with 2 shielded twisted pairs must be used. One pair will be used to
power the connected sensors. The other pair will be used for Modbus data transfer. The quality of this
cable depends on the length of the total Modbus chain and the number of sensor attached. Your
local contractor can help you calculate the coper wire thickness. Make sure the shield is connected
to the power supply side only.
Analog sensors
For 4..20 mA based sensors, a single or double twisted pair cable can be used. The same cable as
for Modbus can be used to connect these sensors.
