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Hacousto Holland bv
Industrieweg 87
2651BC Berkel & Rodenrijs
4E-CMT installation and user guide
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. 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 the L-Net device and the main controller unit.
The L-Net device will not be able to initialize, thus will remain in boot-sequence, not operational.
Caution! Use only crossover cables and keep correct the pinout! Connecting power pins to data pins will
damage the network port.
Page 7 of 13
pin number
GND
shield
RX+
1
RX-
2
TX+
3
power +
4
power -
5
TX-
6
power +
7
power -
8
xover type A cable
pin number
GND
shield
RX+
1
RX-
2
TX+
3
power +
4
power -
5
TX-
6
power +
7
power -
8
xover type B cable
Author:
pin number
shield
GND
1
RX+
2
RX-
3
TX+
4
power +
5
power -
6
TX-
7
power +
8
power -
pin number
shield
GND
1
RX+
2
RX-
3
TX+
4
power +
5
power -
6
TX-
7
power +
8
power -
DD
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