Compact controller 227PM
8Pages

Compact controller 227PM FläktGroup' compact controller 227PM is a complete unit comprising an actuator, a dynamic differential pressure sensor for pressure-dependent air flow control and a user interface with a 3-digit display which makes it possible to monitor pressure and set values without external equipment. The controller operating range is set to a standard value of 0–10 V on delivery. To change the operating range to 2–10 V, see Setting the values, quick reference guide. The controller can also be force controlled via closing contacts (timer, presence detector, etc.) to override the set min or max air pressure. It is also possible to use the controller independently without any external control. Specifications are subject of alteration without further noti

Connection diagram User interface Actuators are provided with color coded and numbered wires. On the cover of the actuator there are two selectors, value selector (1) and function selector (2). Also there is the 3-digit display (3) to show selected functions, values and units. BU-BN BU-BK BU-GY Load for output GY operating voltage control signal feedback signal Observe polarity on secondary of transformers. All common and signal (–) must be connected in line. Incorrect polarity can cause controller damage or operation error. Provide overload protection for line voltage and disconnect as...

Setting the values, quick reference guide Functions, detailed description When the actuator is connected to power supply, settings can be made with the selectors using, for example, a screw driver. 1. Select pressure unit: A dot on the upper-right or lowerright corner of the display indicates which unit is used, Pa or in-H2Ox10-3. If there is need of change, turn the function selector until it points to "Pres/Unit". Then turn the value selector until the dot on the display toggles to the other position. After the selection the display flashes three dashes (- - -) twice for indication that...

according to the selected override function. All override functions are disabled after a time-out of 10 hours. The display toggles after the selection of the function between pressure (8s showing time) and the function (2s showing time). OFF-mode toggles with Y-signal. Selecting another function will disable the Diag function and set it automatically to OFF. Input signals (analog) The input signal Y allows to control the actuator according to the selected mode of operation. In mode 0…10VDC the input signal Y matches to the following pressures: The appropriate symbols are toggled as...

Output signals (analog) Forced controls In mode 0…10VDC the output signal U matches to the following pressures: The controller can be force controlled to the following positions via closing contacts (see fig. 3): (Open) Y= pos. rectified half wave from 24VAC supply (Close) Y= connected to ground conductor of 24 VAC supply (only with mode 2-10 VDC) and to calculate the actual pressure Pact from the feedback signal U: (Pmax) Y= full wave from 24VAC supply (Pbtw) Y= neg. rectified half wave from 24VAC supply (Pmin) Y= disconnected In mode 2…10VDC the output signal U matches to the following...

Setting the controller to a constant pressure The controller can be set to a constant pressure neglecting all analog inputs Y. This functionality can be used as an advanced diagnostic function. Display The display (3) uses 7-segment numbers in full 3-digits. Additional signs include a small circle, three square dots and two rectangular slashes. To activate this function Pmax needs to be set to 0. The Diag dot on the display appears and the controller uses Pmin as the constant pressure to control to. Use the Pmin function to set desired constant pressure. The square dots are used with the...

Technical data Power supply Over voltage Power consumption Input signal Input impedance Feedback signal Permissible ambient - working temperature - storage temperature - humidity Dimensions 24 VAC/VDC ± 20%, 50/60 Hz Up to 40 VDC, max. 5 sec. 4 VA/5Nm, 4.5 VA/10Nm Proportional to [V min ...V max ] 0 - 10 / 2 - 10 VDC, or 0 - 20 / 4 - 20 mA with 500 Ω resistor and override controls >50 kΩ 0 - 10 / 2 - 10 VDC proportional to air volume flow 0 °C to 50 °C (32 °F to 122 °F) -20 °C to 80 °C (-4 °F to 176 °F) 5-95% RH, non-condensing Specifications are subject of alteration without furthe

Wiring Parallel control of two pressure controllers Master-Slave control of two pressure controllers Constant pressure Specifications are subject of alteration without further notice.