Hacousto Holland bv
Industrieweg 87
2651BC Berkel & Rodenrijs
4E-FM installation and user guide
Author:
DD
Page 6 of 12
4.1.3.
Network cabling
4EVAC network features a full duplex RS-422 data link and 24V DC power to remote devices.
If you’re building a distributed system using the 4EVAC network, you should make physical links between
devices using the right cables. The cabling should meet the following requirements:
1.
Crossover twisted-pair cable (compatible with Ethernet crossover)
2.
CAT5e or higher for maximum distance of 250m.
3.
Non-CAT / lower than CAT5e: 250m not guaranteed.
4.
Shield required (at least FTP)
NOTE: If you use a straight cable, the device will power up but the Tx/Rx data terminals will not be properly
connected. This will result in a communication fault between L-Net device and C500 main unit. The L-Net
device will not be able to initialize, and thus will remain in its boot-sequence, not operational.
Caution! Use only crossover cables and keep the correct pinout! Connecting power pins to data pins will
damage the network port.
pin number
pin number
GND
shield
shield
GND
RX+
1
1
RX+
RX-
2
2
RX-
TX+
3
3
TX+
power +
4
4
power +
power -
5
5
power -
TX-
6
6
TX-
power +
7
7
power +
power -
8
8
power -
pin number
pin number
GND
shield
shield
GND
RX+
1
1
RX+
RX-
2
2
RX-
TX+
3
3
TX+
power +
4
4
power +
power -
5
5
power -
TX-
6
6
TX-
power +
7
7
power +
power -
8
8
power -
xover type A cable
xover type B cable
