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80951C_MHW_GF_VEDO EL35CT-EL57CT_03-2010_ENG
3.5.2 RS-485 port
The terminal uses the RS-485 port to dialog according to OSI specifications at the physical level defined by stan-
dard EIA-485.
The RS-485 port is optically isolated and allows dialog from 9.6 kBaud to 115 kBaud via an RJ10 4p4c connector
(Registered Jack type 10 with 4 positions and 4 contacts).
Signal assignment is shown in Table 5.
1
4
Fig. 13
RJ10 connector of the RS-485 port
Pin
Name
Description
1
GND
-
2
Tx/Rx +
Data reception/transmission (A+)
3
Tx/Rx -
Data reception/transmission (B-)
4
+V (reserved)
-
Table 5
Signal assignment of the RS-485 port
Fig. 14
Ethernet port connector
Pin
Name
Description
1
TX_D+
Transmit data +
2
TX_D-
Transmit data -
3
RX_D+
Receive data +
4
N.C.
Not connected
5
N.C.
Not connected
6
RX_D-
Receive data -
7
N.C.
Not connected
8
N.C.
Not connected
Table 6
Signal assignment of the Ethernet port
3.5.3 Ethernet port
The terminal uses Ethernet port to dialog via IEEE 802.3 Ethernet protocol.
The Ethernet port can dialog at 10/100 Mbps using an 8-pin RJ45 connector with LED.
We recommend an Ethernet Base-T with braided leads (CAT. 6).
The wiring scheme must conform to standard TIA/EIA-T568-A. Signal assignment is shown in Table 6.
Led
Color
Description
Sx
Green
Link
Dx
Yellow
Data
1
8
Green
Yellow
The terminals let you set the Ethernet node ID via a user-accessible 16-position rotary switch.
Fig. 15
Rotary switch for setting Ethernet node ID
