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SENSORAY Model 2608 Series Analog I/O Module

SENSORAY Model 2608 Series Analog I/O Module


  • Interfaces analog I/O signals to Ethernet
  • Sixteen 16-bit differential analog inputs
  • Up to eight 15-bit analog outputs with remote sense
  • Measures voltage, thermocouple, and 4-20 mA
  • Integral cold-junction compensation for thermocouples
  • Fully electronic calibration
  • Directly connects to field wiring
  • Connects to Ethernet through 2601 I/O system hub
  • DIN-3 rail mountable

Model 2608 is an analog I/O module that connects to Ethernet through a 2601 communication module. It has sixteen differential analog inputs and 0, 4, or 8 (model 2608-0, 2608-4, 2608-8) single-ended analog outputs. It is a member of the 2600 series of smart I/O modules.

Analog Inputs

Each analog input may be independently configured to measure voltage, thermocouple, or 4-20 mA current loop. The module has built-in 500 ohm resistors for current loop measurements, and cold-junction compensation sensors for thermocouple measurements. Dedicated input channels are used for cold-junction compensation sensors so that all sixteen external inputs will remain available for application use.

All analog inputs are fully differential so that common mode noise will be reduced or eliminated from measurements. Field wiring is connected directly to the 2608 through removable terminal blocks—no external breakout boards are needed.

Modular System

The 2608 can be connected to any of the sixteen IOM (I/O module) ports on the 2601 with a low-cost category-5 patch cable, which provides all operating power and communication signals needed by the 2608. All inter-module communication circuits are optically isolated to prevent potentially disruptive ground loops.

Interfacing a large number of analog signals to one Ethernet port

Interfacing a large number of analog signals to one Ethernet port

A variety of I/O module types are available, each with a specialized function:
Model 2601 I/O Communication module
Model 2608-0 Analog I/O Module, 16-in/0-out
Model 2608-4 Analog I/O Module, 16-in/4-out
Model 2608-8 Analog I/O Module, 16-in/8-out
Model 2610 48 digital I/O, 5VDC to 24VDC
Model 2612 4-channel RTD/Load Cell Interface Module
Model 2620 4-channel Counter/Incremental Encoder Interface Module
Model 2652 8-channel Solid State Relay I/O Module
Model 2653 16-channel Solid State Relay I/O Module
Model 204 24 V 120 Watt power supply
Analog inputs
Channels 16 differential
Resolution 16 bits
Input ranges ±10 V, ±100 mV
Conversion Time 500 samples/second for each channel
Accuracy 6.1 µV (10 V range), 60.1 µV (100 mV range)
CMV range ±10 V
Thermocouple Resolution
Analog Outputs
Channels 0 (2608-0)
4 (2608-4)
8 (2608-8)
Resolution 15 bits
Output voltage range ±10 V
Output current 2 mA, max
Power and Environmental
Power input 24 VDC, 80mA
Operating temperature 0 to 70 °C
Mechanical dimensions (W x H x D): 8.62 x 4.87 x 2.62 inches; 219 x 124 x 67 mm
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