Ethernet Standards 
IEEE 802.3 for 10Base-T
IEEE 802.3u for 100Base-T(X)
IEEE 802.3x Flow Control
Mac Table 
1K MAC address entry
Processing 
Store-and-Forward
Memory 
448K bits packet buffer memory

Protocol
Modbus TCP
Modbus Address
Default value is 0x01
Changeable via Web Interface
Monitoring Parameters
Modbus Read counter
Time counter (in seconds)
FW version
Device Up Time
TCP packages

MQTT Publisher can be enabled and can be used in parallel with Modbus conversion (or stand alone)
MQTT Connection
Broker IP and Port can be entered
Client ID , User name and Password can be set
Publish Topic and Subscribe Topic can be defined from web interface
Data Send Interval
User can send Data send interval in seconds
Default is 60 seconds and HUR will send meter data to MQTT server in that interval

NTP Server
NTP server time will be added to each MQTT message

Data Format
There are 2 predefined formats
Parsed Data As Objects: Sends I/O values in ASCII readable fromat
Parsed Data as Modbus Frame: Send just like the response of Modbus query as hex data (smaller data size)

All versions of HUR Series Modbus TCP Remote Input/Output (I/O) Devices support I/O Logic Functions which can be used to make field automation by using HUR Series itself in the field. As an example, device can be programmed to Turn ON Output or send status of input values to MQTT server or LoRaWAN Server when an input dedected. There are many combinations available.
I/O Logic Commands
16 commands available in Multi Slot Models
8 commands available in Single Slot Models
Condition Slot and I/O
HUR can check programmed input or output of selected slot. This can be any of the available slot (Analog Input, Digital Input, Analog Output or Digital Output)
Condition Command
For Analog Input and Analog Output: HUR can check if the selected I/O value is Higher or Lower than user specified value
For Digital Input and Digital Output: HUR can check if the selected I/O value is ON, OFF or its State Changed (from ON to OFF or OFF to ON)
Condition Duration
HUR can check the command for user defined duration and function is only triggered when command is true for specified duration 
Result Slot and I/O
This is the affected input or output number of slot for triggered command. This can be any of the available slot (Analog Input, Digital Input, Analog Output or Digital Output)
Result Command
For Digital Output and Analog Output: HUR can set output to specific value. It can be On, Off or State Change for Digital Output model and can be user defined value for Analog Output Model
For All Slot Models: HUR can send MQTT message or LoRaWAN message for specified slot when command is triggered

Wait Before Next Check
Once the command is triggered, HUR can wait for next check of command based on user defined duration
Examples

Examples applies to models with the mentioned hardware
HUR can send MQTT message for selected slot if an Analog Input Value is Higher than 10mA.
HUR can send LoRaWAN message for selected slot if an Analog Input Value is Lower than 10mA.
HUR can set Output On for selected Digital Output slot if a Digital Input value is OFF

Console Port
USB Type C or Micro USB connection for LOG in 115200 baud
10/100T(X) RJ45 Ports
Ethernet Connection on 2 ports
Reset Buttons
Reset to Client and Reset to Server Operating modes buttons

I/O Connectors
Terminal Connectors
Digital Inputs: 4 Slots x  8 Channel 12-275V AC-DC, 60mA Digital Optocoupler Input
8 Channel Input terminals and polarity is not important. 2 pins for each connection and total 16 connection pins for each slot.
12-275 AC-DC, 60mA Digital Optocoupler Inputs.

Power Indicator
Power LED
10/100T(X) Indicators
Activity LEDs:
ETH1, ETH2 and HUR (Activity of device itself)
System Indicators
Status LED,
Tx and Rx of data LEDs and Server LED
(LED ON: Server Operating Mode, LED OFF: Client Operating Mode)
Slot LEDs
S-1, S-2, S-3 and S-4: Turns On for 1 second and Turns OFF for 1 second under normal operation of I/O Interface.
Each LED corresponds to related I/O Slot.
Console Indicators
Tx and Rx of data LEDs

Input Range
100 - 240V AC (120 – 370V DC), 50Hz to 60Hz Wide Range AC Power Input
Isolation
Fully Isolated >4200Vrms, 5mA 1 Min
Insulation
Class II

Enclosure
Metal, IP 40
Dimensions
115 x 970 x 126 (w x d x h) mm
Weight
~700gr
Storage Temperature
-40 to 105 °C
Operating Temperature
-25 to 70 °C
Operating Humidity
5% to 95% Non-condensing