Servomotor module with OCT and STO, 50 V DC, 4.5 A (I<sub>rms</sub>) EJ7211-9414

EJ7211-9414 | Servomotor module with OCT and STO, 50 V DC, 4.5 A (Irms)

The EJ7211-9414 servomotor output stage with OCT and STO offers high servo performance in a very compact design for the AM8100 series of motors up to 4.5 A (Irms). The One Cable Technology (OCT) combines a motor cable and a feedback cable for an absolute feedback system in a single cable. The integrated electronic type plate of the AM8100 motors can be read in automatically by the servo modul and configures the motor parameters automatically. This reduces wiring expenditure and commissioning to a minimum.

The fast control technology, based on field-orientated current and PI speed control, supports fast and highly dynamic positioning tasks. The monitoring of numerous parameters, such as overvoltage and undervoltage, overcurrent, modul temperature or motor load via the calculation of a I²T model, offers maximum operational reliability. EtherCAT, as a high-performance system communication, and CAN-over-EtherCAT (CoE), as the application layer, enable ideal interfacing with PC-based control technology. The latest power semiconductors guarantee minimum power loss and enable feedback into the DC link when braking. LEDs indicate status, warning and error messages as well as possibly active limitations.

The EJ7211-9414 enables the user to implement the STO safety function (Safe Torque Off), which corresponds to a safety level Cat 3, PL d according to EN ISO 13849-1:2015. In addition, the module supports the TwinSAFE-SC technology.

The TwinSAFE SC (Single Channel) technology enables the use of standard signals for safety tasks in any network or fieldbus system. The standard functionalities and features of the I/Os are retained. The data from the TwinSAFE-SC I/Os are fed to the TwinSAFE logic, where they undergo safety-related multi-channel processing. In the Safety logic the data originating from different sources are analysed, checked for plausibility and submitted to a ‘voting’. Certified function blocks such as Scale, Compare/Voting (1oo2, 2oo3, 3oo5), Limit etc. are used for this purpose. For safety reasons, however, at least one of the data sources must be a TwinSAFE SC component. The remainder of the data can originate from other standard Bus Terminals, drive controllers or measuring transducers.

Technical data EJ7211-9414
Technology Compact Drive Technology
Load type permanent magnet-excited three-phase synchronous motor
Number of channels 1
Number of outputs 1 x servo motor, 1 x motor brake
Number of inputs 2 x end position, 1 x feedback, 1 x STO
Connection method direct motor connection with OCT
Supply voltage electronics 24 V DC (via power contacts)
Supply voltage power 8…50 V DC (external)
Output current (rms) 4.5 A
Peak current (rms) max. 9.0 A for 1 s
Frequency range 0…599 Hz
PWM clock frequency 16 kHz
Current controller frequency 32 kHz
Rated speed controller frequency 16 kHz
Output voltage motor brake 24 V DC
Output current motor brake max. 0.5 A
Current consumption power contacts typ. 100 mA + holding current motor brake
Current consumption E-bus typ. 130 mA
Distributed clocks yes
Special features compact and system-integrated, absolute feedback, One Cable Technology (OCT), plug-and-play, STO (Safe Torque Off)
Electrical isolation 500 V (E-bus/field potential)
Weight approx. 95 g
Operating/storage temperature 0…+55 °C/-25…+85 °C
Relative humidity 95 %, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 20/see documentation
Pluggable wiring
Approvals CE, TÜV SÜD (certification in preparation)
EJ9576 EtherCAT plug-in module, brake chopper module
AM811x Servomotor 0.20…0.52 Nm for servo I/Os (EL72xx, EP72xx)
AM812x Servomotor 0.50…0.80 Nm for servo I/Os (EL72xx, EP72xx)
AM813x Servomotor 1.35…2.37 Nm for servo I/Os (EL72xx, EP72xx)
AM814x Servomotor 2.40 Nm for servo I/Os (EL72xx, EP72xx)
AG2250 Planetary gear units for Compact Drive Technology
ZK47x4-04xx, ZK4000-xxxx Supply cables for Compact Drive Technology
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Product announcement
estimated market release 1st quarter 2018