Common Connections; Connecting The Gateway To The Power Supply; Connection Procedure For M-Bus - HMS Networks intesis INBACMEB0200100 User Manual

M-BUS to BACnet/IP Server Gateway

5.2.2. Common Connections

5.2.2.1. Connecting the Gateway to the Power Supply

The power supply connector is a green pluggable terminal block (3 poles) labeled as 24Vdc.
IMPORTANT
• Use SELV-rated NEC class 2 or limited power source (LPS) power supply.
• Connect the gateway's ground terminal to the installation grounding.
• A wrong connection may cause earth loops that can damage the Intesis gateway and/or any other
system equipment.
Apply the voltage within the admitted range and of enough power:
• 24 VDC, Max.: 220 mA, 5.2 W
IMPORTANT
• Respect the polarity labeled on the power connector for the positive and negative wires.

5.2.3. Connection Procedure for M-Bus

The gateway connects directly to the M-Bus system without requiring any external RS-232 or EIA-485 to M-Bus
level converter.
Connect the M-Bus bus to connectors A1 (+) and A2 (-) of the gateway's Port A. Respect the polarity.
Remember that the gateway provides 36 VDC M-Bus voltage to the bus, acting also as an M-Bus level converter.
In case no response from the M-Bus device(s) to the frames sent by the gateway is received, check that they
are operative and reachable from the network connection used by the gateway. You can use an EIA-485-to-USB
converter and an M-Bus master software (such as MBSheet or similar) to double-check the M-Bus installation.
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Connection
USER MANUAL Version 1.0.0