HF197AEN_v0501_04
Page 5
1. INTRODUCTION
1.1.
SYSTEM DESCRIPTION OF THE F197-A
Functions and features
The setpoint generator model F197-A is a microprocessor driven instrument designed for manually
control of a device with a (0)4-20mA or 0-10V signal. Moreover, an input value can be displayed but
has no control link with the output value.
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 ABS or aluminum enclosures for harsh industrial
surroundings,
ability to process all types of sensor signals,
transmitting possibilities with two alarm and communication (option) outputs.
Sensor input
This manual describes the unit with a (0)4-20mA sensor input "-A version". Other versions are
available to process pulse or 0-10V signals.
One sensor with a (0)4-20mA output can be connected to the F197-A. To power the sensor, several
options are available.
Standard outputs
Linear (0)4-20mA or 0-10V control output with 10-bits resolution to control a device manually.
The setpoint as well as the minimum and maximum signal output can be tuned.
Two transistor or relay (option) outputs for high / low alarm, relatedto the input value.
Fig. 1: Typical application for the F197-A.
Overview typical application F197
RS232/RS485
Modbus (option)
manual
(0)4-20mA / 0-10V
output
hot
cold
high
alarm output
low
alarm output