Product description
User manual 58185_TREE M4/6-TX PN IP20_hdb_en_10
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3.1.2
Interfaces
Ethernet ports
The TX ports are designed for twisted pair cables with RJ45 connectors.
NOTE
Please use CAT5 cables as a minimum. These cables have the required
technical specifications, e.g., the necessary impedance. The switches are
designed for this impedance level. Using cables with other impedances
may lead to signal reflection in the cable.
A pinout diagram of the RJ45 socket is shown in Fig. 3-3: "RJ45 socket pin-
out".
Pin 1 and pin 2 (RD + and RD -) transfer received data, while pin 3 and pin 6
(TD + and TD -) transfer sent data. Pins 4, 5, 7 and 8 (NC) are not used for
Ethernet transfer purposes.
Ethernet ports
Auto-crossover function
NOTICE
The switch has an auto-crossover function for each port in auto-negotiation
mode.
For this reason, the pinouts for received and sent data are interchange-
able!
Auto-polarity function
The switch has an auto-polarity function for each port.
USB interface
The
TREE M-4TX PN
and
TREE M-6TX PN
TREE managed switches have a
USB interface (serial - FTDI Virtual COM Port).
Configuration:
Transfer rate 115200 bps (115.2 kbps 8N1)
8 data bits
1 stop bit
No parity bit
Fig. 3-3:
RJ45 socket pinout
1
RD +
5
NC
2
RD -
6
TD -
3
TD +
7
NC
4
NC
8
NC
Auto-negotiation mode
Fixed mode
All ports are in auto-crossover mode
Port 1: standard mode (MDI mode (auto
MDIX)
-
All other ports in crossover mode (MDIX)