Belimo TRANE TAF Series, Техническая документация инструкция

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135
I20683 - Subject to change.
Electronic Accessories
1 2 3 4
4= OUTPUT
POTS = INCREASE OUTPUT
1= COM 2= 24V HOT
3= INPUT
BELIMO IRM-100 SP
AN
4/20M
IRM-100
2 3/8"
[60.3]
1 7/8" [47.6]
15/16”
[23.8]
Application
The IRM-100 input rescaling module is designed to change
non-standard voltage or current signal levels into a 2 to 10 VDC
output to modulate -SR type actuators. The IRM-100 is available
for replacement of existing installations.
Operation
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
to a 2 to 10 VDC range.
The IRM may also be used to sequence several actuators
from one signal source. This is done by adjusting the IRM
units to work at different in put ranges.
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 TAF24-SR actuators have to be driven
from the same output, the current requirement would be
I = E/R = (10 volts)/(100000
Ω
) = .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
Ω
resistor is placed across terminal #1 and #3 which
converts the 4 to 20 mA to 2 to 10 VDC.
2
To other
actuators
●
●
●
●
24 VAC Transformer
Line
Volts
Control
Signal
1
Common
2
+ Hot
3
Signal Input
4
Output, 2 to 10 VDC
IRM-100
1
1
Line
Volts 1
Common
2
+ Hot
3
Y
1
4
Y
2
5
U
…-SR
(–)
(+)
●
●
3
2
1
Provide overload protection and disconnect as required.
The controller should be powered from a separate
transformer.
The actuator and IRM-100 may be powered from the
same transformer.
Consult controller instruction data for more detailed
installation information.
To reverse control rotation, use the reversing switch.
3
4
5
5
4
IRM-100 Input Rescaling Module
To Adjust the Zero Start Point and Working Span of Proportional ( . . –SR) Actuators.
(Series 3)
Technical Data IRM-100
Power supply supply voltage: 24 VAC ± 15%
24 VDC ± 15%
Power consumption < 1 watt
Transformer sizing 1 VA
Input voltage: max voltage: 25 VDC
zero (starting point): 0 to 18 VDC
span adjustment:
2.6 to 17 VDC
impedance: 400K
Ω
0 to 20 mA
impedance:
500
Ω
Output voltage: 2 to 10 VDC
current: 15 mA max
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"
Weight .9 oz.
Wiring Diagram
Jumper not
connected to
both pins for
voltage appli-
cations (as
shipped) Jumper on
both pins for
4 to 20 mA
applications
current:
Dimensions
[All numbers in brackets are in millimeters.]