Kamstrup M-Bus Master MultiPort 250D - Overview of Connection Terminals

9Kmstrup A/S • 5512853_C1_GB_01.2017
M-Bus Mster MultiPort 250D
3.1 Overview of connections
Connection number on
mster
Designtion Colour/connector No. Description
Power supply
134 N Blue Neutrl
135 L Brown Live
136 PE Yellow/green Protective erth
USB 2.0 Mx recommended cble length: 5 m
130 VCC Red/1 5 V power supply
131 D- White/2 Dt -
132 D+ Green/3 Dt +
133 GND Blck/4 Ground
RS-232 Mx recommended cble length: 15 m
105 RxD 2 Received Dt
106 TxD 3 Trnsmitted Dt
107 GND 5 Ground
108 DTR 4 Dt Terminl Redy
109 CTS 8 Cler To Send
111 DSR 6 Dt Set Redy
112 RTS 7 Request To Send
RS-485 Mx recommended cble length: 1,200 m
137 A/- Trnsmit/Receive inverted
138 A+ Trnsmit/Receive non-inverted
139 GND Ground
M-Bus Repeter Input Jumper must be set to Repeter
53 L1 M-Bus input to mster in repeter mode
54 L2 M-Bus input to mster in repeter mode
M-Bus Mster Output 4 sets connection terminls, connection in prllel
24 L1 M-Bus output from mster to meters
25 L2 M-Bus output from mster to meters