iSMA-B-W0202 Modbus User Manual
version 1.2
Page 6 / 49
Technical specifications
Power supply
Voltage
24 V AC/DC ± 20%
Power consumption
2 W @ 24 VDC; 4.5 VA @ 24 VAC
Special Inputs
No. of inputs
2
Temperature input
Measurement with attached RTDs
accuracy ±0.1˚C at 25˚C
Voltage input
Voltage measurement from 0 to 10 V
Input impedance 100 kΩ
measurement accuracy ±50 mV
Resistive input
Measurement of resistance from 0 to 1000 kΩ
Resistance measurement method
The voltage divider
Dry contact input
Output current ~1 mA
Measurement resolution
12-bits
Fast counters
50 Hz/100 Hz
Digital Outputs (relays)
No. of outputs
2
Resistive load
3 A @ 230 VAC or 3 A @ 30 VDC
Inductive load
75 VA @ 230 VAC or 30 W @ 30 VDC
Interface
Mini USB
For power up and configuration
RS485
Up to 128 devices
Communication protocol
Modbus RTU, Modbus ASCII
Baud rate
From 1200 to 115200 bits/s
Address
0 to 127
Radio
Frequency
868 MHz
Max output power
+20 dBm (100 mW)
Sensitivity
-120 dBm
Radio Channels
1 ÷ 8
Encryption
AES-128
Baud Rate
From 1200 to 200000 bits/s
External antenna
SMA socket
Ingress protection
IP
IP40
Temperature
Storage
– 40˚C to +85˚C
Operating
– 10˚C to +50˚C
Humidity
Relative
5 to 95%
Connectors
Type
Rising Clamp
Maximum cable size
2.5 mm
2
Dimension
Width
17 mm
Length
56 mm
Height
90 mm