Key Features:

These EtherStax I/O units provide a rugged, highdensity, and high-speed solution to interface a large quantity of analog input signals. Units accept 32 differential analog current inputs, which are ideal for many sensor interface applications in remote zones.

• 32 differential current analog inputs
• 4-way isolation and surge suppression
• Configurable from any web browser
• High-resolution 16-bit A/D
• Fast scanning up to 1KHz
• Dual-format data registers support both 16-bit signed integers and 32-bit floating point formats
• User-configurable IEEE-754 32-bit floating point scaling registers on all channels
• User-configurable integration function on all channels with totalizing 32-bit non-volatile counter registers
• Built-in precision voltage sources for automatic calibration
• On-demand self-test for built-in calibration sources
• Operating temperature: -40 to 70°C (-40 to 158°F)

Product Details

Input Channel Configuration
– 32 differential analog inputs. 16 channels on front and rear panels of unit.
DC Current Input Ranges (per-channel basis)
– ±20mA, 0-20mA, or 4-20mA DC (default).
– User-configured on a per-channel basis.
Input Scaling (per-channel basis)
– Floating Point Format: IEEE-754 32-bit configurable for 12 digits with 4 decimal places.
– 16-bit Signed Integer Format: All channels are represented as ±30,000.
Input Resolution and Accuracy
– Resolution: 15-bit maximum, 0.003%.
– Accuracy: Better than 0.02% of range.
Input Impedance
100 ohms.
Input Scan Groups and Scan Times
– Eight user-enabled 4-channel scan groups.
– 5mS (200Hz) update of all 32 channels.
– 8mS (125Hz) update when totalizing.
– First 4-channel group updates in 770µS (1.3Khz). Each additional 4-channel group adds 590µS to update
Sample Averaging
– 0 to 500 samples, user-configurable.
Input Overvoltage Protection
– Bipolar Transient Voltage Suppressers (TVS), 18V clamp level typical.
Noise Rejection
– Common Mode (50-60Hz): Better than 72dB.

Local Alarm Output

– Failsafe or non-failsafe (software-configurable) relay trips on power or link-loss failure.
– SPST-NO, 1 Form A, Class I, Division II approved.
– 5A @ 24V DC/250V AC, 6000 cycles resistive.
– 3A @ 24V DC/250V AC, 100,000 cycles general.
– 2A @ 24V DC/250V AC, Hazardous locations.
Maximum Switching Voltage and Power
– 250V AC / 750VA, 125V DC / 90W.

Ethernet Interface

Internal Switch or Hub/Repeater
– Dual-port Ethernet switch.
– Web-configurable as a true switch (default mode) or low-latency hub.
Network Connector [10/100 Base-T(X)Copper]
– One or two 8-pin RJ-45 connectors. Automatic MDI/MDI-X. 100m communication distance.
Network Connector (100 Base-FX Fiber-optic)
– One multi-mode duplex SC connector. 2km communication distance. Full/half-duplex, selectable.
Protocols and Addressing
– Modbus TCP/IP or UDP/IP. StaticIP, DHCP, BootP.
Configurable IP addresses.
– Ethernet Modbus TCP/IP Sockets/Sessions
– 1-10 socket/sessions programmable via web page.
Ethernet Redundancy
– Compatible with STP, RSTP, proprietary schemes.


Operating Ranges:
-40 to 70°C (-40 to 158°F).
Power Requirements
– 18-36V DC. Redundant, diode-coupled terminals.
– 4.2W (copper ports), 5.25W (fiber-optic ports).
Ambient Temperature Effect
– Less than 25ppm/°C (0.0025%/°C).
– I/O, power, relay and Ethernet port-to-port.
– Peak: 1500V AC, ANSI/ISA-82.01-1988.
– Continuous: 250V AC, 354V DC.

Enclosure and Physical

Safety Approvals
– CE marked and UL/cUL Listed.
– Hazardous Locations: Class I; Div 2; A, B, C, D.
– Open board units: UL Recognized.
– Shock and Vibration Immunity (in enclosure)
– Mechanical Shock: 50g (3ms), 30g (11ms).
– Random Vibration: 5g, (5-500Hz).