User's Manual

Table Of Contents

Part # 430-4G-050-00-004

Install Hardware

Figure 4-9 4G V-Flex Lite and 4G CR-Pass - Pin-out Diagram

When connecting the device to the network, the following procedures must be followed:

 Use Category 5 cabling with a characteristic impedance of 120 ohms for RS-

485 networks. Category 5 cables with a characteristic impedance of 100

ohms can also be used, but with lower performance.

 Cable manufacturers provide cables with multiple twisted pairs designed for

this type of communication (characteristic impedance is 120 ohm).

 Unused pairs within the cable must be terminated with characteristic

impedance (100 or 120 ohm) on both ends.

 AWG 24 should be considered as the minimum gauge.

 Choose one twisted pair of conductors to use for RS-485 differential

connections, other conductors should be used for Signal Ground (RS-485

GND on Weidmuller connection).

 The RS-232 to RS-485 converter must support Sense Data to be able to

switch from Send to Receive mode.

 Check each device's cabling for ground faults before connecting to an RS-

485 network.

 Each device should have pin 3 of the mini-connector connected to earth

ground.