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Bus Connection RER 133 1MRS755163 Module Technical Description Safety information Dangerous voltages can occur on the connectors, even though the auxiliary voltage has been disconnected. National and local electrical safety regulations must always be followed. The device contains components which are sensitive to electrostatic discharge.
The RER 133 module is connected by a cable to the RS-232 D-type connector marked X3.2 on the rear panel of the RE_ 54_ host device. RER 133 is not a stand alone device. An RE_ 54_ host device is always required to power the module. No external power supply is supported.
REF 542 and REF 542plus are not supported by RER 133. The signal levels and the functionality of the RER 133 module are defined in the RS-485 standard. RER 133 module is a regular type of RS-485 interface, meaning that a maximum of 32 nodes can be connected in a daisy chain type of bus configuration.
Technical Description Construction and installation The RER 133 module is mounted on the side of the RE_ 54_ host device and is connected by the supplied cable to the 9-pin female type D-connector (X3.2) of the RE_ 54_ host device.
Fig. 5.-2 Dimensions of the RER 133 Bus Connection Module 5.1. Module configuration The attributes for the RER 133 can be set through the two DIP switches on the front of the module. The DIP switches are labeled S1 and S2. Switch S1 Usage...
Fig. 6.-1 Pin usage table for the 9-pin D-type connector (X1) The RS-485 interface of the RER 133 module is shown in Fig. 6.-2. The connector (X2) is an 8-pin Weidmüller terminal block. If GND (pin 5) is used, then it is required for all other nodes to be isolated as well.
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Bus Connection RER 133 1MRS755163 Module Technical Description The EIA RS-485 Specification labels the data wires "A" and "B", but many manufacturers label their wires "+" and "-". In our experience, the "+" wire should be connected to the "A" line, and the "-" wire to the "B" line.
Bus Connection RER 133 1MRS755163 Module Technical Description Type designation and technical data RER 133 Type designation RER133 Ordering number Powered from host device (+15 V DC) Auxiliary power supply ~ 1 W, Peak value ~1,8 W Burden 300...19200 bits/s...
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