ESP Safety UPES-50D, Operating Manual, Page: 6 / 51

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Fig. 2.2. UPES Rear View
1. 2-channel board
2. Processor board
3. Power supply unit
4. Main power socket, 220V input voltage
5. Backup power socket, 220V input voltage.
6. Fault relay
7. Third threshold relay
8. Ground terminal
Fig.2.3. Interconnection Board
1. UPES ON/OFF button
2. LED display
3. Buzzer
4. Keyboard
Each channel of the threshold device has a corresponding LED group:
2 green – Acti24V at the output of the module;
4 red – exceeding specified thresholds;
2 blue-status indication of the RS-485 bus lines;
2 yellow – indication of sensor malfunction.
Moreover, in case of concentrations of any threshold of any channel are exceeded, an
audible alarm, which is built in UPES, is activated.
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