Toxic gas detection control unit ET-4D2/A

multi-channelLCD displayfor DIN rail mounting

Gas detection control unit for measurement of flammable and/or toxic gases as well as oxygen. Smoke detectors as option. Graphic display. Menu guided configuration. 3 Alarm levels per channel. 12 freely configurable relays. Analog outputs 4…20 mA (only ET-4DA2). Features Number of Transmitters: 1 to 4 (4-20 mA) Signal Processing: Microcontroller with A/D-Converter Alarm/Fault/Indication:  Illuminated graphic display (160 x 80) for indication of measured values, messages and alarms  12 (3 x 4) red LEDs for alarm indication  LEDs for indication of channel fault (4 x yellow), channel operation (4 x green), operation (1 x green), device fault (1 x yellow) User Interface:  Menu guided system via graphic display and keys  Completely configurable at device, no tools needed  3 password protected servicing levels Alarm Evaluation:  3 freely adjustable alarm levels per channel  Monitoring: over-scale, under-scale or min/max  Latching of each alarm configurable Relays, potential free:  12 change-over contacts 230 V / 5 A, ohmic, (in total: max. 10 A), freely configurable with Alarm 1 to 3 and transmitter fault  2 change-over contacts 230 V / 5 A, ohmic, for maintenance mode and device fault