50 •
BACnet/IP Controller 750-830
Hardware
WAGO-I/O-SYSTEM
750
BACnet/IP Controller
3.1.3.3 Fieldbus Connection
The connection to the fieldbus is made via an RJ45 connector, which is also
called a "Western plug." Wiring for the RJ45 socket on the fieldbus controller
adheres to 100BaseTX specifications. It is mandatory to use a twisted pair ca-
ble of category 5 as a connecting cable. Cable types S-UTP (Screened Un-
shielded Twisted Pair) and STP (Shielded Twisted Pair) with a maximum
segment length of 100 m can be used.
Tab. 3-1: Plug-in Contacts
Contact
Signal
1
TD +
Transmit Data +
2
TD -
Transmit Data -
3
RD +
Receive Data +
4 not
assigned
5 not
assigned
6
RD -
Receive Data -
7 not
assigned
1
2
3
4
5
6
7
8
8 not
assigned
The connection point is lowered for mounting into an 80 mm-high switchgear
cabinet after the connector attachment.
Attention:
The bus connection is approved
only
for use in LAN networks, not for the
connection of telecommunication lines!
In addition to BACnet/IP, the controller also supports the BACnet/PTP proto-
col. The controller can communicate, when connected to the RS232 interface,
with other PTP-capable devices through a modem connection (half router).
The SUB-D connector for the RS232 interface is wired as follows:
Tab. 3-2: Bus Connection and Connection Plug Arrangement for the RS232
Contact Signal
Description
1 - -
Not
used
2
RxD
Receive Data
Receive signal
3
TxD
Transmit Data
Transmit signal
4 - -
Not
used
5
GND
Ground
Signal and supply ground
6 - -
Not
used
7
RTS
Request to send
Request to send; logical Zero
= ready for data receipt
8
CTS
Clear to send
Send readiness; logical Zero
= ready for sending data
1
6
7
8
9
2
3
4
5
View of the
Front of the
Socket
9 - -
Not
used
The pin arrangement corresponds to the RS232 DCE arrangement. This allows
the use of customary 9-pole 1:1 socket/plug cables for the direct connection of
a PC.