• Fast Zero-Crossing, Half-Single-Cycle
and Phase-Angle control
• Built-in extra-rapid fuses
• Current balancing with time-sharing
• Voltage swing compensation
• Voltage and current diagnostics
(interrupted load, line voltage)
• Diagnostics of SCR temperature, SCR
short circuit, open fuse
• Modbus and Profinet communication
PROFILE
Powerful and compact IR12 and IR24
Multichannel Power Controllers are the ideal
solution for heating systems that use any
type of infrared lamps.
With an “all-in-one” philosophy, all of the
elements needed for complete control of IR
lamp groups (for total power up to 60 kW)
are contained in a robust, compact metal
container that mounts on the wall.
There are various models: IR-24 with
24 independent control output and IR-12
with 12 outputs, both with Modbus RTU or
Profinet Fieldbus communication options.
C
ommand
The 12 or 24 channels are commanded via
Modbus RTU serial communication (max
57,600bps) or via Profinet.
Each channel is commanded independently.
P
ower
Each control output can deliver a maximum
current of 9A, including simultaneously on
all channels, up to 216 Amps for IR24
models.
C
ontrol
The Soft-start function, provided in Phase
Angle mode, guarantees gradual initial heating of lamps, reduces current spikes, and
lengthens life cycle.
After the Soft-start phase, when the filament
is hot, the lamp can be controlled in “Burst
Firing” or “Half Single Cycle” mode.
Complete Phase Angle control can always
be chosen. In detail, the control modes,
configurable via SW, are:
BF: Burst Firing
Zero crossing with optimized cycle time:
ideal for fast heating systems with mediumwave IR lamps.
HSC: Half Single Cycle
Zero crossing similar to BF, but able to control half-waves, making it perfect for short
wave lamps as well because it greatly limits
flickering without generating EMC noise;
therefore, expensive and bulky EMC filters
are not needed.
PA: Phase angle
Modulating the conduction angle of each
wave allows more precise and stable control
of IR lamps.
T
imesharing
Continuous monitoring of power percentages on outputs allows intelligent “timesharing” distribution of outputs and provides
continuous balancing of total instantaneous
current levels on each of the three phases.
This reduces spikes, increases the system’s
power factor, and saves energy.
L
inevoltagecompensation
Automatic compensation ensures correct
power to loads even in the presence of
voltage swings.
D
iagnostics
Great attention is given to general and specific diagnostic functions for every output,
with signal LEDs and specific diagnostic bits
readable from serial and Fieldbus.
- Current Diagnostics:
Total load interrupt alarm
SCR short circuit alarm
- Voltage Diagnostics:
Alarm for absence of phase
- Fuse Diagnostics
Fuse break signal (for each output)
- Temperature Diagnostics
Alarm for over–temperature of power
module
The IR-24 and IR-12 Controllers are comple-
tely configurable via GF_ eXpress, Gefran’s
powerful SW configuration tool for all of its
devices.
TECHNICAL DATA
Power supply
Overvoltage
category
Rated current
Rated power
Control mode
Circuit breakers 24 AC-switch monophase with pair of 1200V SCRs in antiparallel
Functions
Serial
communication
Protections and
Alarms
Signal LEDs
I/O logic signals
Electrical
connections
Cooling
Working
temperature
Relative humidity 10....95% without condensation
CPU Supply230 Vac ± 10 % 50/60 Hz 20 VA
Power circuits480Vac (VF/N= 270Vac) ±10% 50-60Hz
2 (industrial devices with permanent connection to power grid)
Model IR-249A x 8 zone = 72A per ogni linea trifase (72A x 3)
Model IR-129A x 4 zone= 36A per ogni linea trifase (36A x 3)
Model IR-2449.6 kW @ 230Vac (72A x 230Vac x 3)
Model IR-1224.8 kW @ 230Vac (36A x 230Vac x 3)
PAModulation with phase-angle control
BF
HSCZero-Crossing modulation at half-wave with optimized cycle time (ex.: short-wave IR lamps)
Power control
MeasurementEffective value of three effective line voltages RN , SN and TN
DiagnosticState of any alarms on each channel and overall state of module
MODBUS (option M)
PROFINET (option E4)
Circuit break in presence of
control
Current crossing in absence
of control
Over temperature power
card 1
Over temperature power
card 2
PWPresence of voltage to CPUgreen
WDWatch Dog tripped, CPU function blockedyellow
L1Presence of phase L1 (presence of crossing for zero)green
L2Presence of phase L2 (presence of crossing for zero)green
L3Presence of phase L3 (presence of crossing for zero)green
FAULTPresence of one or more alarm conditions, differentiated with ashingred
RXState of Rx serial linegreen
TXState of Tx serial linegreen
IN1...4Inputs stategreen
OUT1...4Outputs state LEDgreen
24VPresence of voltage for 24V digitalsgreen
OKOutput OK: Correct operation of digital outputsgreen
4 Logic inputs24V Optoisolated, current draw 20mA
4 Logic outputs24V Optoisolated, maximum deliverable power 250mA
Auxiliaries power supply
Power supply
EarthingPower connector for ex cable from 0.5 to 16 mm² (AWG 10-2)1
Power outputs
RS 485D-Sub 9 pin female connector in parallel (Female)2
Logic I/Os
Power boardforced air with 2 24VDC 3.6W fans (only 1 fan for IR-12)
Control boardnatural convection
0....40°C
Zero-Crossing modulation at full-wave with optimized cycle time (ex.: medium-wave IR
lamps)
Control, linearization, ON percentage compensation for each of 24 channels based on
control received, internal tables, and actual line voltage (according to selected mode)