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10/2021 · User Manual Version 1.0 · valid from firmware version 3.1.22
6
WEBLOG 250
2.5 Interfaces at the housing
RS232 USB- USB- Ethernet Modem Cable glands
Device Master (optional) for mains supply, M-Bus and I/Os
RS232 RS232 D-SUB 9-pin jack (female) for use of the WebLog as a level converter.
Attention: The logger function of the device should be deactivated!
USB-Device USB connector of the integrated USB-to-RS232 converter (FTDI). This interface can
be used to operate the WebLog as a level converter (see RS232C).
A USB cable of type A/B is required to connect this port to a notebook or PC. The
driver for the virtual comport can be either installed fom our CD “Tools&Docs” or
downloaded from the website of the chip manufacturer: www.ftdichip.com
USB-Master USB master interface to be used e.g. to connect a USB memory stick for transferring
exported logger data or performing a firmware update
Ethernet 10/100 MBit RJ45 Ethernet jack for a network connection
Modem not usable
Cable glands for connection to mains supply, M-Bus and I/O lines
3. Technical Data
Operating voltage
110 to 240 VAC, 47 to 63 Hz
Power consumption
max. 100W
Operating temperature range
0 to 45°C
M-Bus voltage
42 V (mark)
M-Bus basic current
max. 375 mA ( = 250 unit loads of each 1.5mA)
Overcurrent threshold
500 mA