Octal Analog Input (0-10 Volts) with Relay


116.90 €

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Product No.: 72498
The 1-Wire Octal (8 Channel) Input device offers an innovative way to monitor up to 8 analog points. In addition to the current reading, each point maintains a minimum value and a maximum value. High/low alarms may also be set independently for each input.

The 1-Wire Octal Input also includes an LED and conditional search support. Additionally, an optional latching relay provides further flexibility for alarm notifications and control applications. These features combine to offer a flexible and efficient system for monitoring and controlling numerous data points throughout a 1-Wire network. The conditional search support allows a host adapter to quickly identify whether any alarm parameters have been met; and the LED and optional latching relay can be configured to behave in a variety of ways:

  • Activate when an alarm becomes active and automatically deactivate when the alarm is cleared.
  • Activate when within alarm parameters and deactivate when within normal range.
  • Independently controlled

The nearly instantaneous automated responses made by the LED and optional relay allow appropriate reactions (activate fan/alarm siren/etc) to occur before the monitoring application is even aware of an alarm. The Octal input has been designed to simplify the reading and controlling process; and therefore any general-purpose 1-Wire host adapter is able to read the analog points. All of the data is contained in five 32 byte memory pages which are updated in real-time. More in-depth information on the memory format is available within the datasheet.


  • Eight 16-Bit analog input channels
  • 0-10V and 4-20mA options available
  • Static protected inputs
  • Readings include minimum, maximum, peak and alarm values
  • Uses 1-Wire Communication Protocol
  • Supports Conditional Search with user-selectable conditions
  • Compatible with all general purpose 1-Wire host adapters
  • Pass-through connector for easy daisy-chaining of sensors
  • Latching Relay may be controlled independently or by alarm status
  • LED may be controlled independently or change due to alarm status
  • Applications include thermostatic controls, industrial systems, flow meters, consumer products, or any system in which discrete control or monitoring is necessary

* The time from a change in input voltage to viewing the result on a computer consists of many delays in addition to the conversion time (i.e. time to read the device on the 1-wire bus, computer processing time). Alarms, peak, minimum and maximum values are computed for each reading, so these parameters have an update rate of 8 * 120ms = 960ms.

** Input voltages outside this range is permitted, but will not read correctly.
1-Wire ConnectionScrew-Down
Latching RelayYes
Operating Range-40 to 85°C
Supply Voltage4-18 Volts DC
Active Current (5V DC, LED On)16.2 mA
Standby Current (5V DC)8.4 mA
Enclosure Dimensions (LxWxH)105x57x41mm
Converter16 Bits
Conversion time* (per channel)120 Milliseconds
Input Voltage (before clamping)-3 to 17 Volts
Input Voltage**0 to 10.5 Volts
Input impedance (-3 to 17 volts)1.24 Megaohm
Precision0.5% (Full Scale)
Relay Voltage Rating(DC)220 Volts DC
Relay Current Rating(DC)2 Amps DC
Maximum Power Ratings (DC)30 Watts DC
Relay Voltage Rating (AC)250 Volts AC
Relay Current Rating (AC)2 Amps AC
Maximum Power Ratings (AC)62.5 VA

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