ES2161: Ethernet Analog Input Modules

These EtherStax I/O units provide a rugged, high-density, 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. Available in an aluminum enclosure or as an open circuit board, both packages stack vertically to maintain a very small footprint. Many other features help increase reliability, improve performance and protect from harsh environments.

Performance Specifications

Analog Field Inputs

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 time
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

Configuration: Failsafe or non-failsafe (software-configurable) relay trips on power or link-loss failure.
Type: SPST-NO, 1 Form A, Class I, Division II approved.
Rating:
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.

Environmental

Operating and Storage Temperature:
Operating Ranges: -40 to 70°C (-40 to 158°F)
Storage Range: -40 to 85°C (-40 to 185°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)
Isolation:
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

Housing Classification and Dimensions:
IP20:  8.226” x 2.444” x 7.25”, 4 lbs. packed
PCB:  7.920” x 1.875” x 7.25”, 1.65 lbs. packed
Safety Approvals: 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)