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Instruction Manual 

ExTox Control Units Series ET-8D and ET-4D2 

 

Page 26 of 39 

Relays ET-8D (for ET-4D2 in brackets) 
K1 to K24 (K12):  

not triggered 

Fault Control Unit K25 (K13): closed 
Maintenance K26 (K14):   closed 

5.3

 

Alarms 

Minimum one configured alarm on one channel level is triggered.

 

If the alarm is configured as latching, it has to be reset manually in case the alarm condition 

is no longer available.

 

Series ET-8D: for that purpose the bar graph and detail indication has to be activated (see 

Chapter 3). Now the corresponding channel has to be selected on the display and then the 

alarm  A1,  A2,  A3  to  be  reset  by  means  of  the  functional  keys  F3  (<AL)  or  F4  (AL>).  The  

alarm can now be cleared by means of the functional key F5 (AQUIT). 
Series ET-4D2: for that purpose the bar graph and detail indication has to be activated. Now 

the  corresponding  channel  has  to  be  selected  on  the  display  by  using  functional  key  F1  

(<CH>)  and  then  the  alarm  A1,  A2,  A3  to  be  reset  by  means  of  the  functional  key  F2  

(<AL>). By means of functional key F3 (AQUIT) the alarm can now be cleared. 
In case of setting the parameter AQUIT=OFF (see 4.8.7) it is only possible to quit the alarm 

if you have released access level 2 or 3 before. 
Relays which can be reset - see Chapter 4.2 -, can be quit by pressing the functional key F7 

(ET-8D) or F5 (ET-4D2). But the bar graph and detail indication has to be selected. In gen-

eral  this  function  is  only  used  for  acoustic  messages,  such  as  for  example  horn,  buzzer.  

Please see the description in Chapter 4.2 concerning re-triggering in case of an additional 

alarm (re-triggering of alarm).  
Status-LEDs 
Channel Fault (yellow): 

off 

Alarm 1, 2, 3 (red):  

on, for triggered alarms 

Operation of Channel: 

on, if channel activated 

Operation:

 

 

 

on 

Fault Control Unit:  

off 

Display 
Bar Graph:  

 

actual value within the range 0 to end value of measuring range  

Actual Value:  

 

actual measured value within the range 0 to end value of meas- 
uring range 

Alarm A1, A2, A3:  

1 for triggered alarms, otherwise 0 

Fault F: 

 

 

Relays ET-8D (for ET-4D2 in brackets) 
K1 to K24 (K12): 

triggered, if alarm condition contains activated alarms.  

Fault Control Unit K25 (K13): closed 
Maintenance K26 (K14):   closed 

5.4

 

Under-Scale and Over-Scale of Measuring Range 

The  measured  value  is  within  the  range  below  0  %  and  above  100%  of  the  end  value  of  

measuring range. Please note that evaluation of the measured value is only done after zero 

point attenuation has been carried out (unless activated according to 4.8.2). 
In case of Under-Scale of measuring range measures for correction of Zero Point should be 

taken. The deviation value could be evaluated in the menu Analogue Inputs (4.5) by means 

of the transmitter input current.  
In  case  of  Over-Scale  of  measuring  range  due  to  high  gas  concentrations  corresponding  

maintenance measures for the individual transmitter should be taken on short notice, such 

as for example calibration and adjustment. 

Summary of Contents for ET-4D2 Series

Page 1: ...Instruction Manual ExTox Control Units Series ET 8 and ET 4D2...

Page 2: ...Page 2 of 39...

Page 3: ...the requirements of the regulations and standards valid for industrial application The Control Units of the Series ET 8D and ET 4D2 are a compact and easily understandable system for up to four or eig...

Page 4: ...19 4 8 System Parameters 20 4 8 1 Maintenance 20 4 8 2 Inputs 4 20 mA 21 4 8 3 Memory Test 22 4 8 3 1 Series ET 8D 22 4 8 3 2 Series ET 4D2 23 4 8 4 Language 23 4 8 5 Mode 23 4 8 6 Options 24 4 8 7 A...

Page 5: ...Profibus DP or ModBus 33 7 Application 34 7 1 Measuring Function 34 7 2 Use in combination with hazardous Areas 34 8 Installation 35 8 1 Mechanical Installation 35 8 2 Electrical Installation 35 8 3 S...

Page 6: ...Control Units can be supplied with EC Type Test of Measuring Function for Explosion Protection acc to EC Directive 94 9 EG ATEX on demand DB These types are always supplied with Software Versions ET88...

Page 7: ...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 455...

Page 8: ...he Series ET 8D and ET 4D2 4 digital inputs potential free 3 freely adjustable alarm levels per channel ascending descending or window range latching configurable 1 fault indication per transmitter 2...

Page 9: ...adjusted alarm levels are addi tionally indicated as dash at the border of the bars in case the transmitter is in opera tion On the right side of the display actual data of status for a selected trans...

Page 10: ...switch between these two settings 3 Bar graph and detail indication the display gives on the left side a survey on the actual measured values of all channels in the form of a bar graph diagram The in...

Page 11: ...d detail indication has to be activated Now the corre sponding channel has to be selected on the display by means of the functional key F1 CH and then Alarm A1 A2 A3 by means of the functional key F2...

Page 12: ...nits for 10 minutes the Access Level is automatically locked again The passwords for all three levels are recorded on the test certificate which is added to the documentation of your control unit Plea...

Page 13: ...er ation is indicated by a blinking status LED Operation for this channel Already stored changes will only be activated if another channel is selected or the menu is left Gas List The chemical totals...

Page 14: ...the con trol unit please pay attention to the remarks for selec tion of alarm levels described therein Mode M left column On Off Switches on or off the evaluation of channel The status is indicated b...

Page 15: ...s are still fulfilled On But the relay is triggered again if the triggering conditions are fulfilled again due to another alarm or another fault re triggering of alarms see 5 3 Attention This function...

Page 16: ...detector in this case internally oc cupied see 8 3 Relay 22 2 Collective Alarm Channels 1 to 8 Mode Logic OR Reset OFF Relay 23 3 Collective Alarm Channels 1 to 8 Mode Logic OR Reset OFF Relay 24 Col...

Page 17: ...nit date changes via F2 F3 4 5 Analogue Inputs Within this menu it is impossible to change any parameters 4 5 1 Series ET 8D Menu Text Selection Function Selection via F1 20mA Analogue Inputs 4 20 mA...

Page 18: ...sured Corrections of settings are done at the transmitter itself and not at the control unit In case this is impossible such as for example due to the fact that the transmitter is hardly accessible fo...

Page 19: ...rmula mentioned above to convert the measuring value changes when using this form of adjustment It is then range measuring of value End factor Gain mA 16 mA 4 Offset current Measured value Measured 4...

Page 20: ...s it is returned to the normal indication Channel 0000 to 1111 figure wise In this number every figure represents one of the chan nels 1 to 8 ET 8D or 4 ET 4D2 starting left with Channel 1 Figure 0 me...

Page 21: ...recognized safe ly Therefore the value has to higher than all transmitter output currents indicating fault conditions Please pay at tention to the remarks in the Transmitter Instruction Manual Standa...

Page 22: ...setting OFF the performance of the analogue output during measuring operation corresponds to the performance described in Chapter 5 9 In case the setting ON is selected all output values 4 mA are ind...

Page 23: ...ion menus and display indication in normal operation Other language versions on request 4 8 5 Mode Access Level to perform changes of parameter settings 3 Menu Text Selection Function Mode ET 8 ET 4 I...

Page 24: ...sed in ExTox Integral Measuring Concepts IMC Corresponding functional amendments and differences are de scribed in a separate IMC Instruction Manual 4 8 7 AQUIT Access Level to perform changes of para...

Page 25: ...value within the range 0 to end value of measuring range Actual Value actual measured value within the range 0 to end value of meas uring range Alarm A1 A2 A3 0 Fault F 0 Relays ET 8D for ET 4D2 in b...

Page 26: ...ication has to be selected In gen eral this function is only used for acoustic messages such as for example horn buzzer Please see the description in Chapter 4 2 concerning re triggering in case of an...

Page 27: ...ggered if alarm condition contains activated alarms Fault Control Unit K25 K13 closed Maintenance K26 K14 closed 5 5 Channel Fault The input current of the transmitter is outside the limits fixed in t...

Page 28: ...control unit continues normal op eration in case of return to the admissible voltage range or in case of faultless passing the memory test Please check the power supply of the device In case of a mem...

Page 29: ...ith the safety concept of your application The digital inputs E1 to E3 are normally without function but they can be used for customer specific requirements On demand please do not hesitate to contact...

Page 30: ...accessory see Chapter 10 Corresponding Interface Modules Art No 825009 or 825017 are available for integration in a Profibus DP or a ModBus environment The specification of the interface is described...

Page 31: ...annel 7 Range ASCII 100 0 Z Channel 8 Range ASCII 14 0 AA Channel 1 Value ASCII 54 0 Measured value of channel with and without decimal place AB Channel 2 Value ASCII 5 3 AC Channel 3 Value ASCII 0 0...

Page 32: ...nnel 2 MODE ASCII 0 BQ Channel 3 MODE ASCII 0 BR Channel 4 MODE ASCII 0 BS Channel 5 MODE ASCII 0 BT Channel 6 MODE ASCII 0 BU Channel 7 MODE ASCII 0 BV Channel 8 MODE ASCII 0 BW System Mode ASCII 0 S...

Page 33: ...ALARM 2 ASCII 0 Alarm status of channel 0 no Alarm 2 1 Alarm 2 X Channel 2 ALARM 2 ASCII 0 Y Channel 3 ALARM 2 ASCII 0 Z Channel 4 ALARM 2 ASCII 0 AA Channel 1 ALARM 3 ASCII 0 Alarm status of channel...

Page 34: ...erkblatt T021 BGI 836 Gaswarneinrichtungen f r toxische Gase D mpfe und Sauerstoff Einsatz und Betrieb EN 50292 Electrical apparatus on the detection of carbon monoxide in domestic premises Guide for...

Page 35: ...ention to the fact that the cables for the gas sen sors should better be run separately and protected against mechanical damages On the type in wall mounted housing and for DIN Rail installation the h...

Page 36: ...R n Smoke detector DP721R n 2 3 6 5 4 1 R 5k6 2 3 6 5 4 Rab 5k6 Inside the ET 8D Relay K21 has to be included into wiring For several smoke detector lines the supplies clamp 1 should all be done from...

Page 37: ...ector DP721R n ET 4D2 since software REV131209R January 2014 ln U U Klemmen Messkanal Clamps of measurement channel 1 2 3 6 5 4 1 2 3 6 5 4 ET 4D2 R 5k6 Rauchmelder DP721R 1 bis n 1 Rauchmelder DP721R...

Page 38: ...n Protection T 023 Toxic Gases Vapours and Oxygen T 021 1 Month Visual Check 4 Months Functional Check 1 Year System Check 1 Month Visual Check 6 Months Functional Check 1 Year System Check You as use...

Page 39: ...f switching functions check of sys tem parameters and of indication and recording facilities 10 Options Article Number Description 297000 Optical Smoke Detector DP721R 930052 Frame Rack for 19 Rack 6H...

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