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Technical Specification



iSMA-B-FCU-HH

iSMA-B-FCU-HL


iSMA-B-FCU-LL

Power Supply


Voltage

230 V AC ± 10%

24 V AC ± 10%

Power consumption

Max. 12 VA (including 7 VA for triac outputs)

Special Inputs





Temperature input

Measurement with attached RTDS (Real Time Digital Simulator)
Resolution ±0.1°C
Accuracy ±0.2°C at 25°C

Voltage input

Voltage measurement from 0 to 10 V DC (input impedance 120 kΩ)
Resolution ±6 mV
Accuracy ±50 mV

Resistance input

Resistance measurement from 0 to 700 kΩ
Measurement resolution ±20 Ω for 20 kΩ load

Dry contact input

Output current ~0.2 mA

Measurement resolution

12 bits

Digital Inputs


Type

Dry contact

Max. input frequency

100 Hz

Analog Outputs




Voltage range

0 to 10 V DC

Max. load current

5 mA

Resolution

12 bits

Accuracy

±1%

Digital Outputs (Relays)




Resistive load (FAN, CLG)

6 A at 230 V AC or 6 A at 30 V AC

Inductive load AC3 (FAN, CLG)

75 VA at 230 V AC or 10 W at 30 V AC

Resistive load (HTG)

10 A at 230 V AC or 10 A at 30 V AC

Inductive load AC3 (HTG)

750 VA at 230 V AC

Triac Outputs





Load

Min.: 1 mA
Max.: 0.5 A at 230 V AC

Min.: 1 mA
Max.: 0.3 A at 24 V AC
Imax = 0.3 A = ITO1 + ITO2 + I24VOut

Min.: 1 mA
Max.: 0.5 A at 24 V AC

Peak load per channel

1.5 A (30 s)

Gate control

Zero crossing turn ON

Frequency range

47 to 63 Hz

Snubber

Snubberless triac

Power Supply Output

Power supply output

24 V AC ± 20%, 7 VA

24 V AC ± 20%, 7 VA** In HL this power supply is also used for triac outputs

COM1




RS485 interface

Up to 128 devices
Fail-safe receiver (bus open, bus shorted, bus idle)

Communication protocols

Modbus RTU, Modbus ASCII or BACnet MS/TP set by switch

PortsScrew connector

Baud rate

From 2400 to 115200 set by switch

Address

0 to 255 set by DIP switch

COM2




RS485 interface

Switch mode, up to 128 devices

Communication protocol

Modbus RTU

Ports2 RJ12 ports

Baud rate

From 2400 to 115200

Power supply for external device

34 V DC ± 15%, 2.5 W

USB1

USB

Mini USB 2.0

Ingress Protection

IP

IP40 for indoor installation

Temperature


Storage

-40°C to +85°C (-40°F to +185°F)

Operating

-10°C to +50°C (14°F to 122°F)

Humidity

Relative

5 to 95%

Connectors



Inputs/outputs, power supply, and communication

Removable

HTG relay

Constant

Maximum cable size

2.5 mm2

Dimensions



Width

123.30 mm/4.85 in

Length

136.60 mm/5.38 in

Height

54.50 mm/2.15 in

Technical specification
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