Analogue output units for Etherstax Ethernet I/O
An
Acromag product story
Edited by the Engineeringtalk editorial team
Jul 30, 2009
Acromag has released two high-performance analogue output units for its Etherstax line of rugged Ethernet I/O.
The high-density ES2171 and ES2172 models each provide 16 channels of process current or voltage output control signals with 16-bit D/A resolution.
Each module accepts Modbus TCP/IP, UDP/IP, or i2o peer-to-peer network inputs and provides high-resolution analogue outputs to drive displays, indicators, chart recorders, positioners, or actuators.
The analogue outputs can control variable speed drives, motors, or solenoid valves.
Units can also provide analogue re-transmission to remote controls or Scada systems.
High-speed processing enables updates in less than 1mS per channel.
Units are designed to meet Class I Division 2 approvals and are also available in a lightweight enclosure-less version.
Two base models support a variety of I/O ranges and options.
The ES2171 outputs DC current signals in a 0-20mA or 4-20mA range.
ES2172 units produce +/- 5V or +/- 10VDC signals.
Output ranges are independently configurable on each channel.
An internal loop-back circuit verifies the output levels.
Using Acromag's i2o peer-to-peer technology, ES217x units can function as an output target device for data sent directly from Etherstax analogue input units.
Both models have an option for 10/100Base-TX copper or 100Base-FX fibre-optic network media.
Open-board versions offer more mounting flexibility.
Numerous features help increase reliability, improve performance, and protect from harsh industrial environments.
Dual network ports provide a redundant communication path for critical applications.
Dual DC power terminals enable use of redundant power sources.
A failsafe relay enables implementation of auto-failover designs or an alarm output on a power or link-loss failure.
Continuous 250VAC (354VDC) isolation - with a peak 1500VAC rating - safely separates I/O signals from the power, relay, and Ethernet ports.
The compact, stackable aluminium enclosure resists 50g shock and 5g vibration making it ideal for mounting directly on machinery.
An internal, isolated dual-port Ethernet switch provides dual-path communication redundancy with support of STP, RSTP, or any proprietary ring redundancy schemes.
Etherstax units can operate as remote slave devices or communicate peer-to-peer.
In addition, 10 Modbus TCP/IP sockets allow communication with multiple masters.
An embedded web page provides easy setup menus to eliminate programming.
The stackable, high-density packaging enables installation of 48 analogue outputs in an 8 x 7in footprint or 96 outputs across a 19in rack.
A high-strength aluminium enclosure gives IP20 protection.
This rugged box is ideal for mounting on DIN rails, walls, or on machinery.
Plug-in terminal blocks offer easy installation and servicing.
A stackable open-board version (no housing) is lightweight and simplifies mounting in alternative enclosures with lower costs for OEMs and integrators.
Etherstax I/O are designed for high-reliability operation.
Units feature 1500Vrms isolation with surge protection on all ports to increase performance and minimise downtime.
Industrial-grade specs include extended -40C to 75C operating temperatures for low power, high efficiency, fan-less designs.
Redundant DC power input with internal diode coupling delivers a 'bump-less' transfer to the backup power source.
A user-programmable watchdog timer can send outputs to a failsafe state or hold the last value if there is a communication failure.
Failsafe SPST 5A fault relays provide local alarming, notification, or shutdown if network communication or power fail.
Etherstax are well-suited to many applications for both end users and OEMs.
The remote monitoring and control capabilities are ideal for Scada, embedded, and test and measurement applications.
Typical uses include power generation, chemical, oil/gas, simulators/trainers, and automation operations.
On the plant floor, the rugged design delivers dependable performance for a variety of distributed I/O functions.
In a control panel, the compact design permits mounting in tight spaces.
CE and UL approvals are pending.
Etherstax are suitable for use in Class I, Division 2, Group A, B, C, and D locations.
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