Burkert 3280 - 8 Start-Up; Functions of the Standard Device

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Start-up
Type 3280, 3285
8 START-UP
WARNING!
Danger due to improper operation.
Improper operation may result in injuries as well as damage to the device and the area around it.
▶ The operating personnel must know and have understood the contents of the operating instructions.
▶ Observe the safety instructions and intended use.
▶ Only adequately trained personnel may operate the device.
Before start-up, carry out fluid and electrical installation of the valve.
Motor valve Type 3280 and 3285 has different functions which can be configured and parametrized via the DIP
switches.
8.1 Functions of the standard device
The following basic functions can be activated or changed via the DIP switches.
Function Description
Zero point shut-off (not
for on-off)
The valve has a zero point shut-off which guarantees that the valve closes tight
when input signals are below a threshold of 1 % of the input signal. The valve is
closed when values are below this threshold
Interruption in the power
supply
When the power supply is interrupted, the valve remains in its respective position.
When the supply voltage is applied again, the control electronics automatically
detect its current valve position and will automatically adjust the valve position if
standard signal has changed
Digital output When the valve reaches the closed position, the position can be relayed e.g. to a
PLC via the digital output.
10 to 30 V = log “1” = valve closed
Analog input
(set-point value input)
(not for on-off)
0...10 V standard signal or 4...20 mA standard signal, see chapter “7.3”. With a
set-point value input of 4...20 mA, the valve stops in the current position and the
LED flashes red (signal error detection) if the value of the input signal falls below
4 mA
Digital input (set-point
value input) (only for
on-off)
The digital input is used as a normally closed contact. When 10 - 30 V is applied,
the valve opens.
0...5 V = log „0“, 10...30 V = log „1“
Inverted input correspondingly inverted!
Effective direction
The normal effective direction of the set-point value can be set to increasing or
decreasing (see chapter “7.3”). If valves are set to increasing, the valve is opened
as far as possible with the largest set-point
Valve actuating speed Two valve actuating speeds can be set (see chapter “7.3”). At normal valve speed the
motor valve moves from the closed valve position to the open valve position (0...100 %)
in 2.5 s (Type 3280), 4 s (Type 3285). At slow valve speed the motor valve moves
from 0...100 % in 5 s (Type 3280), 10 s (Type 3285)
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