Another typical example is the application of an external power supply to a communication bus, for powering the remote in- or output module when the transferred supply voltage has become insufficient due to the long cable lengths. It consists of three RJ45 connectors which are a ‘BUS IN’ and ‘BUS OUT’ connector for making the incoming and outgoing connections while the third connector allows the connection for the remote in- or output module. Two termination jumpers are provided whereby the communication (Pin4 & Pin5) and audio (Pin7 & Pin8) pairs can be terminated at their characteristic impedance (120 Ohm), to ensure a clear communication without reflections. A terminal block connector is provided whereby an external power supply (+24 V DC) can be connected to the bus. The +24 V DC is available on RJ45 Pin3 (+) and Pin6 (GND). The unbreakable plastic housing allows easy mounting on Mini DIN rails.
Specification
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Bus termination Audio 120 Ω
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Communication 120 Ω
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Connectors 3 x RJ45
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1 x 2-pin Euro Terminal Block (Power supply)
Product Features
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Dimensions 61 x 48 x 40 mm (W x H x D)
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Weight 0.043 kg
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Mounting Mini DIN rail
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Construction Unbreakable plastic housing
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Colours Green