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Ethernet

The Ethernet 1-Wire Interfaces offer the convenience of utilizing preexisting LAN/WLAN as the backbone of your 1-Wire network. All Ethernet 1-Wire Interfaces provide a simple to use high level control for many of the most popular models of 1-Wire devices. These factors should be considered when selecting the right model for your application:

How many 1-Wire devices will you be working with?

The OW-SERVER-ENET-2 allows a maximum number of 22 1-Wire devices to be connected with the high level support being used. Utilizing the low level command set in the OW-SERVER (OWFS does this for instance), it can support the equivalent number of devices as the HA7Net (up to 100 devices). To achieve a simplified installation of additional 1-Wire devices, it is recommended to use the JB6 1-Wire junction box, which provides six Rj11 jacks for connecting sensors.


Will the software be on the same LAN / WLAN?

The HTTP POST function within the OW-SERVER and TC-SERVER is particularly of value in situations were the software may be operating in a cloud based service. The HTTP POST function enables the OW-SERVER and TC-SERVER to initiate the transmissions from behind a firewall without special network configurations. The OW-SERVER (Rev 2) also features TCP socket function introduced in firmware version 1.34 which enables 1-Wire devices readings to be polled and written to from behind the firewall.


Is more than one 1-Wire network beneficial?

The OW-SERVER's 3 RJ12 ports are 3 separate identifiable 1-Wire networks which increases reliability by minimizing 1-Wire network size and preventing a wiring issue on one network from interfering with the other two channels. The HA7Net has a single 1-Wire network with 3 RJ12 ports.

Maintenance on existing system?

The OW-SERVER-ENET-2 is the newer product which is being actively developed and improved. The HA7Net is a legacy product that is not recommended for new designs.


What 1-Wire devices will be worked with?

The HA7Net and OW-SERVER support many of the same 1-Wire devices while the TC-SERVER's support is limited to the Thermochron / Hygrochron loggers.

HA7Net & OW-SERVER SupportOnly HA7Net SupportOnly OW-SERVER Support
DS18B20 - Programmable Resolution 1-Wire Digital Thermometer
DS18S20 - 1-Wire Digital Thermometer
DS1920 - iButton Digital Thermometer
DS2406 - Dual Channel Addressable Switch
DS2438 - Smart Battery Monitor (Temperature Only)
DS2423 - 4kbit 1-Wire RAM with Counter
D2 - Discrete I/O Line
OW-TEMP - Temperature Sensor Line
DSP7x4 - Digital Display
TAI8540D - Humidity Sensor
T8A - 8 Channel 0-5V Analog Input
Z2Ten - 0-10V Analog Output
DS2408 - 8 Channel Addressable Switch
DS2438 - Smart Battery Monitor
DS2450 - Quad A/D Converter
DS28EA00 - Thermometer with Sequence Detect and PIO
OW-ENV - Environmental Sensor Line
OW-IO - Analog Input Line
OW-IO-DIO8 - 8 Channel Discrete Input with 2 Pulse Counting Channels
OW-RTD4W - 4 Wire RTD Interface
OW-VIB - Vibration Monitor

Is WiFi helpful in some installations?

The OW-SERVER is available in a WiFi version which allows for a wire free network connection, which simplifies and makes on site installations more versatile. A WiFi network connection is particularly useful in applications where an Ethernet connection may not be readily available.
1-Wire Ethernet Interface Comparison Table
A brief overview of key specifications.
ModelCommunicationNetwork Protocols1-Wire DevicesHigh Level Supported Devices
HA7Net
10/100 EthernetHTTP & HTTPS - Poll and Control
Telnet - Diagnostic Tool
Multicast - Discovery Tool
DHCP
SNTP
Up to 100 devicesDSP7x4: Digital Display
GP1 Counter: Pulse Counter
T8A: 8 Channel 0-5V Analog Input
Z2Ten: 0-10V Analog Output
DS18B20: Programmable Resolution 1-Wire Digital Thermometer
DS18S20: 1-Wire Digital Thermometer
DS1920: Temperature iButton
DS2438: Smart Battery Monitor
DS2406: Dual Addressable Switch
TAI8540D: Humidity Module
OW-SERVER-ENET-2 
10/100 EthernetHTTP & SNMP - Poll and Control
HTTP POST - Scheduled Data Delivey
Telnet - Diagnostic Tool
TCP Socket - Poll and Control Behind Firewall
Broadcast Locate on Network
DHCP
Up to 22 devicesDS18B20: Programmable Resolution 1-Wire Digital Thermometer
DS18S20: 1-Wire Digital Thermometer
DS2406: Dual Addressable Switch
DS2408: 8 Channel Addressable Switch
DS2423: 4kbit 1-Wire RAM with Counter
DS2438: Smart Battery Monitor
DS2450: Quad A/D Converter
OW-ENV: Temperature, Humidity, Pressure and/or Light Wall Mount Sensors
OW-IO-AI4: Quad Analog Input 4-20mA & 0-10V
OW-IO-AI8: Octal Analog Input 4-20mA & 0-10V
OW-IO-DIO8: Octal Discrete Input & Output
OW-RTD4W: 1-Wire Interface for 4-Wire RTD with Optional Relay
OW-TEMP: DS18B20 and DS18S20 Temperature Sensors in Probes, Foil Tape and Wall Mount Enclosures
OW-SERVER-WiFi-2G
802.11b/WiFiHTTP & SNMP - Poll and Control
HTTP POST - Periodically Receive Data
Telnet - Diagnostic Tool
TCP Socket - Poll and Control Behind Firewall
Broadcast - Locate on Network
DHCP
Up to 22 devicesDS18B20: Programmable Resolution 1-Wire Digital Thermometer
DS18S20: 1-Wire Digital Thermometer
DS2406: Dual Addressable Switch
DS2408: 8 Channel Addressable Switch
DS2423: 4kbit 1-Wire RAM with Counter
DS2438: Smart Battery Monitor
DS2450: Quad A/D Converter
OW-ENV: Temperature, Humidity, Pressure and/or Light Wall Mount Sensors
OW-IO-AI4: Quad Analog Input 4-20mA & 0-10V
OW-IO-AI8: Octal Analog Input 4-20mA & 0-10V
OW-IO-DIO8: Octal Discrete Input & Output
OW-RTD4W: 1-Wire Interface for 4-Wire RTD with Optional Relay
OW-TEMP: DS18B20 and DS18S20 Temperature Sensors in Probes, Foil Tape and Wall Mount Enclosures
TC-SERVER-ENET-2 
10/100 EthernetHTTP - Download and Configure
HTTP POST, FTP - Receive Downloads
Telnet - Diagnostic Tool
DHCP, DNS, SNTP
Up to 6DS1921G: Thermochron: -40°C to +85°C
DS1921H: High Resolution Thermochron: +15°C to +46°C
DS1921Z: High Resolution Thermochron: -5°C to +26°C
DS1922L: High Capacity/Resolution Thermochron: -40°C to +85°C
DS1922T: High Capacity/Resolution Thermochron: 0°C to +125°C
DS1922E: High Capacity/Resolution Thermochron: 15°C to +140°C
DS1923: Hygrochron -20°C to +85°C
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HA7Net - Ethernet 1-Wire Host Adapter
$175.95
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TC-SERVER - Thermochron Server
$127.95
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