Siemens WTV676-HB6035, Manual, Page: 9 / 16

9
Siemens A6V11157961_en--_d
Building Technologies 2018-07-24
Plant type
Maximum
distance
Total cable
length
Cable cross-
section
Number of
devices (slaves)
Max.
transmission rate
Small
developments
1000 m 4000 m 0.8 mm
2
64 2400 baud
Large
developments
3000 m* 5000 m 1.5 mm
2
64 2400 baud
Direct vicinity 5000 m* 7000 m 1.5 mm
2
16 300 baud
Point-to-point
connection
10000 m* 10000 m 1.5 mm
2
1 300 baud
* Shielded cabling required at a distance in excess of 1000 m
(see EN13757-2 appendix E).
Signal specification
M-bus Condition Minimum Typical Maximum Measuring unit
Number of unit M-bus loads per
web server
WTV676-HB6035 0 - 20 -
Transfer rate C
Segment
≤ 382 nF 300 2400 9600 baud
Bus power WTV676-HB6035 24 40 42 R
Bus current WTV676-HB6035 0 30 mA
Connection terminals
The device has the following connection terminals / LED
A B
C
E G F H I
D
WTV676-HB6035
A Ethernet connection
B USB connection (no function)
C Antenna connection
D Terminals (4) and (5): Connections
M1 and M2 for M-bus devices and
the following level converters.
Terminals (1), (2) and (3) are not
used.
Do not apply electricity to these
terminals.
E
Terminals (16) and (17): Power
supply AC/DC 24 V
F Terminals (12) and (13): Relay
connections for digital output 1, max.
AC/DC 30 V
G Terminals (14) and (15): Relay
connections for digital output 2, max.
AC/DC 30 V
H Terminals (9), (10), and (11):
Connections for the digital inputs.
Terminal (8): Reference for digital
inputs
I Terminals (6) and (7) are not used.
Do not apply electricity to these
terminals.