User manual ALFA 802 and ALFANET 802
Contents
1. ane irm O O w l pe go v Ww w c n S p H O LL ot y E o gt gt oy Moo SUPPLY RELAY RS485 CONTACT Vac OUTPUT NETWORK INPUT Vdc SPDT optional Alfanet network connections RS 485 NETWORK CONNECTIONS 3 wired shielded One of the Controllers can be the PC Interface Network connections A HI connected to A HI B LO connected to B LO GND OV connected to GND OV Shield to Earth only on one side of cable AO GND Endpoint Network cable Connection Network cable Endpoint Place Terminator Resistor Network 3 wire shielded point 3 wire shielded Network of 250 Ohm at both ends of min 0 75mm Network min 0 75mm the RS485 cable between Max Cable length 1KM line A and line B Note 1 NETWORK CABLE MAY NOT HAVE ANY SIDE BRANCHES for this use Repeaters2. operation the LED set switches off Start Stop and Wait function of the off delay timer Push the UP key to start the timer the LED on lits and the relay will be activated During the off delay time the timer unit can be set in a waiting mode by pressing the DOWN key During this waiting mode the relay will deactivate as PO3 0 or stays active as PO3 1 During the waiting mode the LED on is blinking and the remaining time is on hold To continue the off delay timer push the UP key again As in the other hand the DOWN key is pressed again second time than the off delay timer is stopped the display shows for 5 seconds 000 and the LED on goes off The timer stops completely and after 5 seconds the display shows the set off delay time again in the display So the unit is ready for the next start Setting internal parameters By pushing the DOWN key for more then 10 seconds you enter the internal programming menu In the left display the upper and lower segments are blinking With the UP and DOWN keys the required parameter can be selected See parameter table If the required parameter is selected the value can by read out by pushing the SET key By pushing simultaneously the SET key and the UP or DOWN key the parameter value can be changed If no key is pushed for 20 seconds the ALFA NET 802 will return to its normal operation and the changes are saved Parameters ALFA 802 Para Description Paramet
3. the time in seconds Error messages In the display of the ALFA NET 802 the following error messages can appear EE Setting are lost Solution Reprogram the settings Technical details ALFA 802 Off delay Timer unit or Type Range Supply Relay Input Communication Control Front Dimensions Panel cutout ALFANET 802 Off delay Timer unit with network 70 999 min sec hrs 7230 Vac 24Vdc or 12Vdc on request SPDT 250V 16A C NO 8A C NC cos phi 1 Potential free input contact RS 485 network only at ALFANET 802 3 wire shielded cable A B and Gnd Thru pushbuttons on front Polycarbonate IP65 35 x 77 x 71 5mm hwd 729 x 71mm hw Provided with memory protection during power failure Connection with screw terminals on thebackside Equipped with self test function Special versions are available upon request Dimensions 60 Address VDH Products BV Produktieweg 1 9301 ZS Roden The Netherlands Tel Fax Email Internet 31 0 50 30 28 900 31 0 50 30 28 980 info vdhproducts nl www vdhproducts nl Connections ALFA NET REMARK To terminate RS485 Network Connect a 250 Ohm resistor between 80X series Line A and Line B at both cable ends Common GND e e dD 23 fine s yi nc SRT com o lt 2 __ _1 pN VD lt L ma q I 1 gt QO SZ UO tap ap gt Z ee oe Cc Cw
4. User manual ALFA 802 and ALFANET 802 Off delay Timer unit VDH doc 060350 Version v1 1 Date 26 05 2008 Software ALFA 802 Flash File Do060350 wpd Range 0 999 Operation The ALFA NET 802 is a panel mounting timer unit with a off delay relay function The off delay time is set by the keys on the front panel The timer unit has a range from 0 999 minutes seconds or hours P01 The timer unit has also a contact input for starting stopping or waiting the unit P02 The ALFANET 802 is provided with a RS 485 network connection to readout or set the unit on the PC with ALFANET software by using a ALFANET PC Interface Installation On the topside of the ALFA NET 802 can be read how to connect this unit such as powersupply relay output contact input and network After power up the ALFA NET 802 and the self test is finished the unit displays the off delay time As the output relay is activated the LED on in the display lits to indicate this Control The ALFA NET 802 Timer unit can by controlled by three pushbuttons on the front These keys are SET view change setting 4 UP increase setting V DOWN decrease setting Changing current off delay time Push the SET key the LED set starts blinking Release the SET key Now push the SET key again and together with the UP or DOWN keys the current off delay time can by changed A few seconds after releasing the keys the timer unit returns to it s normal
5. er Range Default meter value Remark Unit of time 0 minutes 1 seconds Contact inout mode 0 Not active 1 Start only at closing the input puls contact 2 Stop only at closing the input puls contact 3 Start Wait at closing the input puls contact 4 Stop Stop at closing the input puls contact 5 Wait as long as input conct is closed Waiting mode 0 Relay de actives during waiting 1 Relay stays active during waiting Display mode 0 Display shows set off delay time as the time is not active 1 Display extinguishes as the timer is not active 2 Display stays on 000 as the off timer has run out Restart only possible as the power supply has been taken interrupted Down key mode 0 Pushing the Down key during running the timer the timer is set in the waiting mode Pushing the Down key for the second time the timer will reset 1 Pushing the Down key the timer unit will reset directly Up key mode 0 Start timer with Up key possible 1 Start timer with Up key not possible Auto reset relay after end off time 0 99 sec 0 No auto reset 250 Network number only at ALFANET 802 Software version Production year Production week Serial number x 1000 Serial number units In case that the timer unit is set on minutes P01 0 the display shows the last minute of the current rest time in seconds To indicate this the lower segment of the first digit is lit and the other digits show
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