Overview Of Connections - Kamstrup M-Bus Master MultiPort 250L Installation And User Manual

3.1 Overview of connections

Connection number on
master
Power supply
134
135
136
USB 2.0
130
131
132
133
RS-232
105
106
107
108
109
111
112
RS-485
137
138
139
M-Bus Repeater Input
53
54
M-Bus Master Output
24
25
8
Designation Colour/connector No.
N Blue
L Brown
PE Yellow/green
VCC Red/1
D- White/2
D+ Green/3
GND Black/4
RxD 2
TxD 3
GND 5
DTR 4
CTS 8
DSR 6
RTS 7
A/-
A+
GND
L1
L2
L1
L2
55121391_B1_GB_12.2013
Description
Neutral
Live
Protective earth
Max. recommended cable length: 5 m
5 V power supply
Data -
Data +
Ground
Max. recommended cable length: 15 m
Received Data
Transmitted Data
Ground
Data Terminal Ready
Clear To Send
Data Set Ready
Request To Send
Max. recommended cable length: 1,200 m
Transmit/Receive inverted
Transmit/Receive non-inverted
Ground
Jumper must be set to Repeater
M-Bus input to master in repeater mode
M-Bus input to master in repeater mode
4 sets connection terminals, connection in parallel
M-Bus output from master to meters
M-Bus output from master to meters