Wiring RMS621
18 Endress+Hauser
4.2.3 Connection of outputs
The device has two galvanically isolated outputs which can be configured as an analog output or an
active pulse output. In addition, an output for connecting a relay and transmitter power supply is
available. The number of outputs increases accordingly when the extension cards are installed
(see Section 4.2.4).
Fig. 11: Connection of outputs
Item 1: pulse and current outputs (active)
Item 2: passive pulse output (open collector)
Item 3: relay output (NO), e.g. slot A III (slot BIII, CIII, DIII on optional extension card)
Item 4: transmitter power supply (transmitter power supply unit) output
Interface connection
• RS232 connection
The RS232 is contacted by means of the interface cable and the jack socket on the front of the
housing.
• RS485 connection
• Optional: additional RS485 interface
Plug-in terminals 103/104, the interface is only active as long as the RS232 interface is not used.
• PROFIBUS connection
Optional connection of Energy Manager to PROFIBUS DP via the serial RS485 interface with the
external module HMS AnyBus Communicator for Profibus (see Section 8 ’Accessories’).
Fig. 12: Interface connection
Pressure sensor with passive current output (4 to
20 mA)
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