Burkert 1094 Instructions De Service page 8

Drive electronics Type 1094-PHR (Order no. 154463) in
connection with proportional valve Type 2822
Proportional valve Type 2822 has a different construction to the valve types listed
previously in these instructions. In particular, the valve armature is supported by shaped
springs, so that the slip-stick effect is absent in this device.
In principle, the valve can be driven both with a variable DC (e.g. 0...24V DC, no noise in
this case) or a PWM signal. In the latter case, the PWM signal has only the function of
varying the magnetic force via the pulse-duty factor. A dither motion, as with a core
supported by a sliding ring, does not have to be generated.
Since the solenoid armature with Type 2822, because of its design, has a higher
dynamic than the other proportional valves, the frequencies available with the standard
versions of the drive electronics Type 1094 are too low; in operation, they would lead to
increased noise and a poorly defined opening behaviour. A version of the electronics
Type 1094, specially developed for Type 2822 in the design PHR (Order no. 154463),
enables higher PWM frequencies to be set that are adapted to this valve.
ATTENTION!
6 - 1094
For operation with Type 2822, one should work exclusively with
the drive electronics Type 1094 in the design PHR (Order no.
154463).