Instruction Manual
ExTox Control Units Series ET-8D and ET-4D2
Page 7 of 39
2
Features of The Control Units
Concentrations of flammable and toxic gases as well as of oxygen are centrally evaluated by
the Control Units of the Series ET-8D and ET-4D2 after measuring them safely with our Ex-
Tox transmitters.
The Control Units could be combined with all ExTox-Transmitters ExSens (-I) and Sens (-I).
The control units are available in wall mounted housing, for DIN-Rail installation and for
installation in 19''-Rack or Control Panel. The power supply can flexibly be done with 230 V
(85…264 V AC, 120…340 V DC) or 24 V DC. On request we could supply you with corre-
sponding uninterruptible power supplies for our control units.
The control units in combination with ExTox transmitters comply with EN 60079-29-1 and
EN 45544 for Gas Detection Systems. Furthermore they are in conformity with the European
Directives 94/9/EC (ATEX), 2004/108/EEC (EMC) and 2006/95/EEC (LVD).
2.1
Series ET-8D
8 input channels for transmitter (4-20 mA, three-wire system) or smoke detector
24 relay outputs, potential free, freely configurable
Illuminated graphic display (240 x 64) for indication of measured values, messages and
alarms
8 analogue outputs, potential free (only Type ET-8DA)
Measuring function for explosion protection: in conformity with Directive 94/9/EC (ATEX)
Wall mounted housing, 230 V AC, Software ET881118, Operation ET-8:
II (2)G
otherwise: II (3)G
