Ex i ELX4181 Ex i | Analog output EtherCAT Terminal 228 The HART (Highway Addressable Remote Transducer) protocol is used for communication with intelligent field devices. This bidirectional data transfer protocol is based on the 4/20 mA standard and offers an approach to overcome the limitations of analog signal transmission by superimposing the digital communication on the analog current signal. With this type of frequency shift keying, a carrier frequency is modified between two different frequencies; the higher frequency corresponds to logical “0”, the lower frequency corresponds to logical “1”. The analog current signal remains unaffected by this superimposition. This enables more extensive interaction with intelligent field devices and monitoring systems, including device configuration with vendor-specific Device Type Managers (DTMs), condition monitoring and processing of additional measured values. Furthermore, the digital transfer of measured values via the HART protocol enables validation of these values. The combination of analog and digital signal transmission represents a holistic field communication solution that is easy to use, costeffective and very reliable. These advantages have established HART communication as a global standard for process automation. Technical data 1-channel analog output terminal 0/4…20 mA, single-ended, 16 bit, HART, Ex i ELX4181 | ESX4181 Technology intrinsically safe actuators with HART support (Rev. 7) Signal current Resolution Connection method Conversion time Number of outputs 0/4…20 mA 16 bit (incl. sign) 2-wire typ. 1 ms 1 (single-ended) +60 °C -25 °C The ELX4181 analog output terminal is used for the direct control of intrinsically safe field devices located in hazardous areas classified Zone 0/20 or 1/21. It can optionally function as a 0…20 mA or 4…20 mA interface and enables communication complying with the HART protocol (Highway Adressable Remote Transducer). The HART protocol enables two-way communication through digital data transfer via the analog interface. The ELX4181 is supplied via the power contacts of the ELX9560 power feed terminal. The EtherCAT Terminal indicates the signal state by means of light emitting diodes. Error LEDs signal overload and wire breakage, and additional LEDs provide information about the state of the HART communication and indicate any communication errors. Load < 500 Ω Output error < 0.1 % (relative to end value) Supply voltage electronics 24 V DC (via power contacts), ELX9560 power supply Current consumption typ. 10 mA + load power contacts Current consumption E-bus typ. 85 mA Special features parameterisable watchdog, activatable user calibration Operating temperature -25…+60 °C Approvals CE, Ex (certification pending) Weight approx. 60 g Further information www.beckhoff.com/ELX4181 We reserve the right to make technical changes.
ELX9560, ELX9012 Ex i Ex i | System terminals The ELX signal terminals can be seamlessly integrated into the EtherCAT Terminal system via the ELX9560 power supply terminal. In terms of communication, they behave in the same way as standard EtherCAT Terminals. EtherCAT Terminals can provide information on the device status at any time, enabling targeted trouble shooting. Providing the same integrated communication capabilities, ELX terminals offer significant space savings and considerably simplified troubleshooting in the event of a fault, compared with conventional methods of connecting intrinsically safe field devices to I/O systems. When ELX signal terminals are installed, they must always be preceded by an ELX9560 in the terminal strand, and only signal terminals of the ELX series may be connected to an ELX9560. An ELX strand must always be terminated with an ELX9012 bus end cover. Power supply terminal, Bus end cover 24 V DC, 1.0 A, electrical isolation Technical data ELX9560 ELX9012 Technology terminal supply bus end cover +60 °C -25 °C +60 °C -25 °C EtherCAT Terminal 229 Standard-compliant integration of ELX Terminals into an EtherCAT Terminal strand The ELX9560 power supply terminal generates an electrically isolated output voltage of 24 V EX from an 24 V DC input voltage for supplying downstream ELX terminals. The connected ELX terminals are supplied via the power contacts. The applied voltage and the voltage output at the power contacts are continuously monitored. The operating state of the terminal is indicated by the LEDs and can be read out for diagnostics purposes within the process image of the higher-level control system. The ELX9012 is used to terminate each ELX terminal segment and covers the power contacts according to IEC 60079-11, in addition to the E-bus contact. It is colour-matched to the ELX terminal series. Unpermissible integration of ELX Terminals into an EtherCAT Terminal strand Input voltage 24 V DC (-15 %/+20 %) – Output voltage 24 V DC EX – Max. output current 1 A – Current consumption typ. 40 mA – E-bus Electrical isolation 2500 V (E-bus/field potential) – Special features electrically isolated output voltage, reverse polarity protection, diagnostic cover for power and E-bus contacts of supply and output voltage Operating temperature -25…+60 °C -25…+60 °C Approvals CE, Ex (certification pending) CE Weight approx. 200 g 16 g Housing width 48 mm 8 mm Further information www.beckhoff.com/ELX9560 www.beckhoff. com/ELX9012 We reserve the right to make technical changes.