Kenosha Reuse Discussion Board > ZION, IL
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> Belimo irm-100 IRM100 input rescaling module
Belimo irm-100 IRM100 input rescaling module
To adjust the zero start point and working span of Belimo proportional ( . . SR) actuators.
The IRM-100 input rescaling module is designed to change nonstandard
voltage or current signal levels into a 2 to 10 VDC output
to modulate Belimo -SR type actuators. The IRM-100 is available
for replacement of existing installations. The MFT product
can replace 100% of the IRM-100 applications, more effectively.
The IRM-100 is installed between a controller and a Belimo
...-SR actuator. The module can be adjusted to work with a
zero offset of 0 to 18 VDC and a span range of 2.6 to 17 VDC.
The IRM-100 has a 2 pin jumper mounted to the circuit board.
When the jumper is connected between these 2 pins, a 4 to
20 mA signal can be fed directly into the IRM. The result
being the conversion of a wide range of analog control signals
IRM-100 used as a current amplifier
In some applications, the capacity of a controller output may
not have current available to control multiple end devices. An
example would be a controller which has an output current of
.5 mA maximum. If 10 AF24-SR US actuators have to be
driven from the same output, the current requirement would
be I = E/R = (10 volts)/(100000 ) = .1 mA for each actuator.
For the 10 actuators, 1 mA of current would be necessary to
properly control the actuators.
The IRM-100 may be used as an interface to provide a higher
current capacity to the system. The IRM-100 has an output
capacity of 15 mA. This higher level output can handle a
greater number of actuators. By calibrating the IRM-100 for a
2 to 10 VDC input to achieve a 2 to 10 VDC output, IRM-100
provides this added capacity for the system.
The same circuit will also work if a 4 to 20 mA signal is used.
A 500 resistor is placed across terminal #1 and #3 which
converts the 4 to 20 mA to 2 to 10 VDC.
Power supply supply voltage: 24 VAC 15%
Input voltage: max voltage: 25 VDC
zero (starting point): 0 to 18 VDC
span adjustment: 2.6 to 17 VDC
Electrical connection wire terminals, 14 gauge max
Ambient temperature -20 F to +150 F [-30 C to +65 C]
Humidity 5 to 95% RH non-condensing
Mounting Snap-Track (provided)
Dimensions board: 1 3/16" x 2 3/16" x 9/16"
w/Snap-Track: 1 7/8" x 2 3/8" x 15/16"
