Installation
5
gas-net
C1 and C2
Page 5-3
5.2.4 DSfG interface (optional)
The DSfG protocol is an internal protocol for gas meters for data transmission
between devices of the
gas-net
series.
The DSfG interface is a SUB-DB 9 male connector located on the back of the
device. Secure the connector with screws.
5.2.5 TCP/IP Interface (optional)
The TCP/IP interface is an RJ45 socket at the back of the device. It facilitates
the communication via Ethernet with 10/100 MBit/s and thereby integrates the
device in a standard network installation. In addition to time synchronization
based on the NTP protocol, remote inquiries and the Modbus-TCP protocol for
exchanging data with external devices are also possible via the TCP/IP
interface.
The IP address, subnet mask and gateway address must be parameterized for
an adequate integration in the existing network infrastructure. Please pay
attention to the fact that the IP address must be unambiguous in the subnet.
Please ask the network administrator for the subnet mask and gateway address.
The use of an STP CAT5 network cable (not transposed) is mandatory.
The pin assignment of the RJ45 socket corresponds to the general Ethernet
standard.
The TCP/IP interface adjusts itself automatically to the network transmission
rate.
5.2.6 COM2 interface (optional)
The COM2 interface is a serial interface to RS232 and may be used as protocol
interface for the connection of a host computer.
The corresponding pin assignment is as follows:
Pin
no.
Signal
Signal name
Assignment of the 9-pin
rectangular connector
1
DCD
Data carrier detect
--
2 RXD Received
data
used for RK512/3964R and
MODBUS
3
TXD
Transmitted data
used for RK512/3964R and
MODBUS
4
DTR
Data terminal ready
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