HBM RM4220 - Application

RM4220
8
A1091-4.0 en/deHBM
2 Application
The RM4220 module is an amplifier for sensors with strain gages. The ampli
fier offers a very simple and practical setting of the zero point and the full scale
with DIP switches and potentiometers. The bridge excitation voltage can be
selected: 5 or 10V. The output signal can be 0 … 10 V or 10 V and, at the
same time 4 … 20 mA.
The transducer connection can be with four‐wire or six‐wire configuration. If
you are using six‐wire configuration, you can ignore the influence of the resist
ors or the resistance change of the extension cable.
The housing, made of polyamide PA type PHOENIX EM, can be attached to
any support rails as per DIN EN 60715. The support rails must be located
within an EMC‐proof housing, e.g. in a control cabinet.
Voltage supply
24 V   15 V
Excitation voltage 5/10V
Amplifier + Filter
Output‐
interface
Amplification
Zero
Voltage
supply 24V
Output
0 … 10V or
10V
Output
4 … 20mA
GND
GND
GND
Fig. 2.1: Principle diagram