1
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
ALFA
NET
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.
[
] UP
- increase setting.
[
] 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 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 P03=0 or stays active as P03=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.
