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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

Ports

Screw 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

Ports

2 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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