2 Installation and startup
Connection plan:
RS232 PC: PC interface for service and level converter operation
RS232 MODEM: Modem interface for service and level converter operation
M-Bus: M+, M- M-Bus terminals (3 pairs). M-Bus devices are wired polarity independent in
parallel to the same line. The characters +, - mark only the different bus
lines.
Earth for symmetry of M-Bus
Power: V+ Power supply: positive terminal for DC (10..28VDC)
V- Power supply: negative terminal for DC
• Polarity independent for AC, 13..27VAC
• Please do not connect mains supply !!
LED lamp: The green LED is on if the power supply is connected and the
microcontroller is ready for operation.
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