Product Description
Denali Safe NET (DEN-S-NET-E) is a Functional Safety certified mid-power, highly integrated, low profile, digital servo drive intended to be plugged or soldered to an application-specific daughter board. The drive includes advanced Functional Safety features, like FSoE (Safety over EtherCAT) communication, Safe Stop and Safe Input as well as best-in-class energy efficiency thanks to its state-of-the-art power stage. The product is based on EtherCAT communication and can be easily configured with the Novanta Drives's free software MotionLab 3.
Main features:
Ultra-small footprint
Functional Safety: STO, SS1, FSoE; SIL3 and PLe certified
48 VDC, 5 A continuous
Up to 50 kHz current loop, 25 kHz servo loops
20 kHz ~ 200 kHz PWM frequency
16 bit ADC current sensing
Supports Halls, Quadrature encoder and BiSS-C
Up to 4 simultaneous feedback sources
Full voltage, current, and temperature protections
Typical applications:
Collaborative robot joints & end effectors
Robotic exoskeletons & wearable robots
Medical applications
UAVs
Low inductance motors
Lab equipment
Page contents
Part numbering
Product | Ordering part number | Status | Image |
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Denali Safe NET Functional Safety certified pluggable servo drive with EtherCAT communication. | DEN-S-NET-E | IN DESIGN |
General Label Identification |
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Specifications
Electrical and Power Specifications
Minimum absolute DC bus supply voltage | 8 VDC |
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Maximum absolute DC bus supply voltage | 60 VDC |
Recommended power supply voltage range | 8 VDC ~ 48 VDC This voltage range ensures a safety margin including power supply tolerances and regulation during acceleration and braking. |
Internal drive DC bus capacitance | 5 µF ± 30% Note that DEN-S-NET uses ceramic capacitors. The capacitance value varies with DC bias and temperature. |
Logic supply voltages |
During an overvoltage fault, system could become non-operational, but safety function is maintained. |
Boot-up time | 4 s |
Minimum shutdown time | 500 ms |
Output reference voltages | 3.3 V ± 0.2%, 10 mA source / sink capability |
Maximum continuous phase current | 5 A 5 A can be obtained working at 48 V with an appropriate dissipation to keep the product plate under 70 ºC. See Thermal and Power Specifications below and Installation for further details. For disambiguation on current definitions please see Disambiguation on current values and naming for Ingenia Drives. |
Maximum peak phase current | 10 A @ 1 sec Notice that peak current could be limited by an automatic current derating algorithm. |
Maximum continuous output power | > 250 W |
Maximum DC Bus voltage utilization | TBD @ 20 kHz TBD @ 50 kHz TBD @ 100 kHz TBD @ 200 kHz Note 1: these values assume a Sinusoidal commutation and no load connected. |
Standby logic supply consumption | TBD W typ. See details and conditions in Thermal and Power Specifications below |
Motion Control Specifications
Supported motor types | Rotary brushless (SVPWM and Trapezoidal) |
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Power stage PWM frequency (configurable) | 20 kHz, 50 kHz (default), 100 kHz, 200 kHz |
Current sensing | 3 phase, shunt-based current sensing. 16-bit ADC resolution. Accuracy is ±2% full scale. |
Current sense resolution | 0.505 mA/counts |
Current sense range | ± 16.5 Apk (full range) |
Max. Current loop frequency (configurable) | 50 kHz Check the Power Stage & Control loops relationship section below. |
Max. servo loops frequency (position, velocity & commutation) (configurable) | 25 kHz Check the Power Stage & Control loops relationship section below. |
Feedbacks |
All feedback inputs are single-ended, 3.3 V logic levels. Check Safe Feedback section. The following feedback protocols are supported and can be used outside of the Functional Safety certification:
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Supported target sources | Network communication: EtherCAT with Safety over EtherCAT (FSoE) |
EtherCAT |
Magnetic and capacitive connections supported |
Control modes |
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Functional Safety Specifications
This product is certification pending. Until receiving the certificate any content in this section is subject to change.
DEN-S-NET Safe Communication (already implemented) | DEN-S-NET Safe Motion (future release) | |
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Safety functions |
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Safe Feedback | Not Supported | Safe Feedback with the combination of 2 individual encoders:
See Safe Feedback Combinations (DEN-S-NET Safe Motion - future release) for further details. |
Safety Integrity Level (SIL) according to IEC 61508:2010 | SIL3 | |
Performance Level (PL) according to ISO 13849-1:2015 | PLe, Cat. 3 | |
Safety Function Reaction Time | ≤ 25 ms | |
Safe inputs | 1 x Redundant Safe Input. Non-Isolated. Logic level (3.3 V and 5 V tolerant). Active-low. | |
Command Source |
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FSoE cycle time | ≤ 50 ms | |
Standards compliance | Targeted standards (certification pending):
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Safe Feedback Combinations (DEN-S-NET Safe Motion - future release)
Denali Safe NET can provide advanced Safe Motion functions by using two individual non-certified encoders:
Feedback Combination | DEN-S-NET Safe Communication (already implemented) | DEN-S-NET Safe Motion (future release) | |
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Safe Feedback 1 | Safe Feedback 2 | Safety Functions allowed | |
- | - | STO, SS1-t and SI | STO, SS1-t and SI |
BISS-C BP3 - Port 1 | BISS-C BP3 - Port 2 | N/A | STO, SS1-t and SI Safe Velocity Functions: SS1-r, SLA, SAR, SLS, SSR, SDI, SV, SSM Safe Position Functions: SS2-r, SS2-t, SOS, SLP, SLI, SP |
BISS-C BP3 - Port 1 | QEI | N/A | STO, SS1-t and SI Safe Velocity Functions: SS1-r, SLA, SAR, SLS, SSR, SDI, SV, SSM Safe Position Functions: SS2-r, SS2-t, SOS, SLP, SLI, SP |
Digital Halls | BISS-C BP3 - Port 2 | N/A | STO, SS1-t and SI Safe Velocity Functions: SS1-r, SLA, SAR, SLS, SSR, SDI, SV, SSM Safe Position Functions: SS2-r, SS2-t, SOS, SLP, SLI, SP |
Digital Halls | QEI | N/A | STO, SS1-t and SI Safe Velocity Functions: SS1-r, SLA, SAR, SLS, SSR, SDI, SV, SSM Safe Position Functions: SS2-r, SS2-t, SOS, SLP, SLI, SP |
Note: To guarantee enough diversity, the encoders must be of different technology or manufacturer.
Note: Other feedback combinations can be used for Motion Control purposes out of Functional Safety certification.
Environmental Conditions
Environmental test methods | IEC 60068-2 |
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Case temperature (Operating) | -20 ºC to +70 ºC |
Ambient temperature (Operating) | -20 ºC to +60 ºC |
Case and Ambient temperature (Non-Operating) | -40 ºC to +100 ºC |
Altitude (Operating) | < 2000 m above sea level. |
Vibration (Operating and Non-operating) | 10 Hz to 150 Hz, 1 g |
Mechanical Shock (Operating and Non-operating) | ±5g Half-sine 30 msec |
Pollution degree | Pollution degree 2 with an IP54 enclosure installation. |
Over-voltage category | II |
Maximum Humidity (Operating) | up to 93%, non-condensing at 60 ºC |
Maximum Humidity (Non-operating) | up to 93%, non-condensing at 60 ºC |
Inputs/Outputs and Protections
General purpose Inputs and outputs | 2x non-isolated single-ended digital inputs - 3.3 V logic level. Can be configured as:
2x non-isolated single-ended digital outputs - 3.3 V logic level, 3 mA max. sink / source current. Can be configured as:
2x ±3.3 V ,16-bit, differential analog inputs for load cells or torque sensors. Can be read by the Master to close a torque loop. 1x 0.3 V ~ 3 V, unbuffered analog output. |
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Safe Inputs |
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Dedicated digital output | Dedicated 3.3 V digital output for Fault Signal status. |
Shunt braking resistor output | Configurable over any of the digital outputs (see above). Enabling this function would require an external transistor or power driver. |
Motor brake output | Dedicated, PWM-capable, 3.3 V digital output for driving a mechanical brake. Turn-on and turn-off times are configurable. Enabling this function would require an external transistor or power driver. |
Motor temperature input | 1x dedicated, 3.3 V, 12-bit, single-ended analog input for measuring motor temperature. NTC, PTC, RTD, linear voltage sensors, silicon-based sensors and thermal switches are supported. |
Protections |
The configurable protections are configurable up to the drive limits. In any case when the limits are reached, the drive is completely switched off with the current reduced to 0.
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Over-current | An overcurrent device in series (i.e. fuse or similar) is needed with a rating of maximum x3 of the max current of the motor on the system and a minimum voltage rating of 60V Consider Vbus overshoots and reinjections to dimension the protection accordingly. |
Communication for Operation
EtherCAT | CANopen over EtherCAT (CoE) File over EtherCAT (FoE) Ethernet over EtherCAT (EoE) Failsafe over EtherCAT (FSoE) Magnetic and capacitive connections supported |
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Reliability Specifications
MTBF | TBD |
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Mechanical Specifications
Dimensions | 33 mm x 17.6 mm x 9.5 mm |
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Weight | 7 g |
Compliance
EC Directives |
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Electromagnetic Compatibility (EMC) Standards |
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Product Safety Standards |
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Functional Safety Standards | See section Functional Safety Specifications |
Environmental Test methods | IEC 60068-2:
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Thermal and Power Specification
TBD
Power Stage & Control loops relationship
The power stage PWM frequency can be adjusted in 4 different frequencies. Each frequency has an associated rate for the control loops, as specified in the following table.
Power stage PWM frequency | Current loop frequency | Servo loops frequency (position, velocity, commutation & shunt) |
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20 kHz | 20 kHz | 20 kHz |
50 kHz | 50 kHz | 25 kHz |
100 kHz | 50 kHz | 25 kHz |
200kHz | 50 kHz | 25 kHz |