HF124PEN_v0501_04
Page 5
1. INTRODUCTION
1.1.
SYSTEM DESCRIPTION OF THE F124-P
Functions and features
The PI ratio controller model F124-P is a microprocessor driven instrument designed to control the
ratio between two flows.
This product has been designed with a focus on:
ultra-low power consumption to allow long-life battery powered applications (type PB / PC),
intrinsic safety for use in hazardous applications (type XI),
several mounting possibilities with aluminum or GRP enclosures for harsh industrial
surroundings,
ability to process all types of flowmeter signals,
transmitting possibilities with communication option,
Flowmeter input
This manual describes the unit with a pulse type input from the flowmeter "-P version". Other
versions are available to process (0)4-20mA or 0-10V flowmeter signals.
One flowmeter with a passive or active pulse, Namur or sine wave (coil) signal output can be
connected to the F124-P. To power the sensor, several options are available.
Standard outputs
Configurable linear (0)4-20mA or 0-10V analog output with 10-bits resolution to control a valve
or pump.
Two alarm outputs: high and low ratio alarm.
Overview typical application F124
(0)4-20mA / 0-10V
control output
RS232/RS485
Modbus
(option)
R1:
alarm output
LOW ratio
R2:
alarm output
HIGH ratio
external safety input
Fig. 1: Typical application for the F124-P.