RA33 Wiring
Endress+Hauser 21
4.5.4 Printer interface / RS232 (optional)
The printer/RS232 interface is galvanically isolated (testing voltage: 500 V) and is used to
connect a printer. It is connected via a 3-pin plug-in terminal in the housing cover.
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Fig. 20: Printer connection via RS232
4.6 Post-connection check
After completing the device's electrical installation, carry out the following checks:
Device status and specifications Notes
Is the device or cable damaged (visual inspection)? -
Electrical connection Notes
Does the supply voltage match the information on the nameplate? 100 to 230 V AC/DC (±10%)
(50/60 Hz)
24 V DC (-50% / +75%)
24 V AC (±50%) 50/60 Hz
Are the mounted cables relieved of tension? -
Are the power supply and signal cables connected correctly? See wiring diagram on the housing
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