Connecting The Device Electrically - RMG USM GT400 Operating Manual

8.3 Connecting the device electrically

In this chapter you will receive information on connecting the electrical connec-
tions.
The terminal strip for the electrical connection is located in the external connection
box. The terminal assignment and the markings of the cable are always identical.
Fig. 8.5: Connection assignment on the terminal strip
Maximum assignment
The maximum assignment is always completely available for the connections of
the Ex-de connection box.
• Current / voltage supply (24 VDC)
• Warning message (Warn)
• Alarm message (Alarm)
• Pulse output for "Forwards mode" (Pulse 1) and "Backwards mode" (Pulse 2)
• 2 x direction detectors for bi-directional operation (I/O1/2)
• Interface for RMGViewUSM (RS 485 0)
• Interface for an RMG flow computer (RS 485 1)
• Interface for any flow computer (RS 485 2)
• Analog output (4-20 mA)
• Connection for a pressure sensor as a 2-wire 4-20mA
(AUX1; Terminal 26: [P +] Terminal 27: [P -])
• Connection for a temperature sensor (PT100; AUX2; Terminal28: [PT100 ++],
Terminal 29: [PT100 +] Terminal 30: [PT100 -] Terminal 31: [PT100 -])
Cable specification
The following cable specifications are according to a complete assignment of the
USM-GT-400 ATEX / IECEx version. The cable types listed are recommendations
that can be replaced by technically comparable cable types.
8 Installation
Manual USM GT400 · EN10 · May 2021
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