Pulse Length / Pulse Frequency Controller; Connecting A Rinsing System; Operation With Automatic Cleaning System - Honeywell APT4000PH User Manual

Controller functions

Pulse length / pulse frequency controller

Pulse length controller (PLC)
The pulse length controller is used to operate a valve as an
actuator. It switches the contact on for a time that depends on
the controller output. The period is constant. A minimum ON
time of 0.5 sec is maintained even if the controller output takes
corresponding values.
Output signal (switching contact) of pulse length controller
ON time (Y = 20 %)
1
0
ON time (Y = 80 %)
1
0
Pulse length
Pulse frequency controller (PFC)
The pulse frequency controller is used to operate a frequency-
controlled actuator. It varies the frequency with which the con-
tacts are switched on. The maximum pulse frequency [pulses/
min] can be defined. It depends on the actuator.
The Contact ON time is constant. It is automatically calculated
from the user-defined maximum pulse frequency:
Output signal (switching contact) of pulse frequency controller
ON time
1
0
Pulse frequency (Y = 20%)
1
0
Pulse frequency (Y = 80%)
84

Connecting a rinsing system

The "Wash" contact can be used to connect a simple splash
cleaning system. Rinse time and rinsing interval are defined
during configuration (Pg 58).

Operation with automatic cleaning system

The APT4000PH allows connection of an automatic cleaning
system. The cleaning cycle is activated according to the clean-
ing interval defined during configuration (Pg 59).
APT4000PH
Wash 17
18
Power supply
17
Wash
Automatic
cleaning
system
18
7
Control -
+
8
e.g. splash cleaning
85