Input Output Units

The I/O Unit enables the monitoring and/or control of Analog, Digital Inputs & Outputs of devices through MODBUS RTU protocol.
A single box has 8 Analog, 8 Digital inputs and 4 potential free Relay contacts and requires only the setting up of Unit ID through a DIP Switch before use.
Using multiple units on the RS 485 Bus, up to 2000 Inputs and 1000 Output contacts can be easily realized.
Using our RS 485 to GPRS / WiFi / Ethernet Gateway products, monitoring and control of these units may be done over the wireless network / Internet etc.

Features & Specifications

Serial Interface
Interface	RS 485
Data Rates	9600
Data Bits	8
Parity	No Parity
Stop Bits	1
Flow Control	None
Protocol	MODBUS
MODBUS ID Setting	Using 8 position DIP Switch
ID Range	1 to 255
Isolated Digital Inputs
Number of Inputs	8
Digital Input Voltage	5 – 24 V DC or 4 – 20mA, Selectable using on board Jumpers
Isolation	3750V RMS
Analog Inputs
Number of Inputs	8
Analog Input Voltage	0 – 12 V DC
Analog Input Type	Single ended or Differential or 4 – 20mA Selectable
Relay Outputs
Number of Outputs	4
Relay Contacts	Normally Open and Common
Contact Rating	1 A at 120 V AC or 2 A at 24 V DC
Environmental
Operating	0 °C to 55 °C
Storage	-40 °C to 85 °C
Power
Input Voltage	8 to 24 V DC
Current	250 ma ~
Protection	Fuse and reverse Polarity protection
Indicators(LED)
Power	Red
TXD	Yellow
RXD	Green
Packaging
Dimensions (LxWxH)	140mm(L) x 130mm(W) x 31mm(H)
Weight	500g
Warranty	12 Months for the box product

Model Number	Description
I/O Unit	RS 485 MODBUS Input Output Unit