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Accelnet & Stepnet Plus Panels STO Manual 16-01338 Rev 00
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5.0 Introduction to the Accelnet & Stepnet Plus Panels
5.1 Product Description
The Accelnet & Stepnet Plus Panels are 1-axis and 2-axis drives contained in a single mechanical package.
These drives are intended to be operated from transformer-isolated, fused, DC power supplies and can drive
motor currents up to 20 Adc per axis. The 2-axis drives have a single Safe Torque Off (STO) function that is
common to both axes. When the STO function is activated, the ability to drive motor current is cut-off in both axes.
In the case of rotary motors, the torque produced by the motor is zero when the current is cut-off. In the case of
linear motors, the force produced by the motor is zero when the current is cut-off. The Safe Torque Off (STO)
function has been developed in accordance with IEC 61508, ISO 13849-1 and IEC 61800-5-2. All models in the
Accelnet & Stepnet Plus Panels family are certified* by TÜV SÜD as meeting the stated SIL Capability, Category
and Performance Levels and other requirements of the given standards. The Safe Torque Off (STO) function is
realized in “hardware only” such that no software, firmware, or programmable device is involved in the execution
or reliability of the STO function.
* This certification is pending at the time that this document was prepared.*
5.2 Model Overview & Numbering
Family Axes EtherCAT CANopen Motor
Accelnet Plus
1 BEL BPL
Servo
2 BE2 BP2
Stepnet Plus
1 TEL
Stepper
2 TE2 TP2
This table shows the Accelnet & Stepnet Plus Panel models organized by family, number of axes,
communications, and motor types. Models within a prefix (i.e. TE2) family vary by the supply voltage, output
current, and options that are available.
All of these models have the same Safe Torque Off (STO) feature.
Table 4