iSMA-B-FCU Hardware User Manual
www.ismacontrolli.com
DMP242en | 1st Issue rev. 3 | 02/2022
page 6 of 53
Triac
Outputs
Load
Min.: 20 mA
Max.: 0.5 A at 230 V
AC
Min.: 20 mA
Max.: 0.3 A at 24 V
AC
I
max
= 0.3 A = I
TO1
+
I
TO2
+ I
24VOut
Min.: 20 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
RS485
Interface
RS485
Up to 128 devices
Failsafe Receiver (Bus Open, Bus Shorted, Bus Idle)
Communication Protocols
Modbus RTU, Modbus ASCII or BACnet MS/TP set by switch
Baud Rate
From 2400 to 115200 set by switch
Address
0 to 255 set by DIP switch
RJ12
Interface
RS485
Up to 128 devices
Communication Protocol
Modbus RTU
Baud Rate
From 2400 to 115200
Power Supply
34 V DC ± 15%, 2.5 W
USB
USB
Mini USB 2.0
Ingress
Protection
IP
IP40
Temperature
Storage
– 40°C to +85°C
Operating
0°C to +50°C
Humidity
Relative
5 to 95%
Connectors
Inputs / Outputs,Power Supply
and Communication
Removable
HTG Relay
Constant
Maximum Cable Size
1.5 mm
2