AKT2G-SDO-004-000
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Safety Terminal with Four Digital Fail-safe Outputs
The AKT2G-SDO-004-000:
- Is a safe output terminal with digital outputs for connecting actuators A mechanical device for moving or controlling a mechanism or system.
An actuator is typically a mechanical device which transforms an input signal (usually an electrical signal) into motion.
The actuator is usually a physical mechanism but it can also refer to an artificial agent or intelligent agent.
Virtual Instrumentation: Actuators and sensors are the hardware complements of virtual instruments.
Computer programs of virtual instruments use actuators to act upon real world objects. (contactors A contactor is an electrically controlled switch (relay) used for switching a power circuit.
A contactor is activated by a control input which is a lower voltage/current than that which the contactor is switching.
Unlike a circuit breaker, a contactor is not intended to interrupt a short-circuit current., relays, etc.) with a maximum current 0.5A (24VDC).
- The Bus Terminal has 4 fail-safe outputs.
- Meets these requirements:
- IEC International Electrotechnical Commission - A not-for-profit, non-governmental international standards organization that prepares and publishes International Standards for all electrical, electronic and related technologies. 61508:2010 SIL 3
- DIN EN ISO 13849-1:2015 (Cat 4, PL e)
- UL508, UL1998, and UL991
The safety terminal has the typical design of an EtherCAT Ethernet ofr Control Automation Technology. EtherCAT® is an open, high-performance Ethernet-based fieldbus system. The development goal of EtherCAT is to apply Ethernet to automation applications which require short data update times (also called cycle times) with low communication jitter (for synchronization purposes) and low hardware costs. terminal.
Figure 1: AKT2G-SDO-004-000 Safety Terminal with Four Digital Fail-safe Outputs
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Be sure to review:
Related Topics: Map Input and Output to Variables
Parameter Name | Description | Values |
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Standard outputs |
The safe output can be switched off from the PLC Programmable Logic Controller - A digital computer used for automation of industrial processes, such as control of machinery on factory assembly lines. Used to synchronize the flow of inputs from (physical) sensors and events with the flow of outputs to actuators and events. program The act of performing a sequence of instructions or commands.. The safe outputs are logically ANDed with the standard digital outputs. |
True / False |
Current measurement active |
Current measurement for the outputs are activated. |
True / False |
Testing of outputs active |
Test pulses When the step gets activated, the action is activated for a single execution, and possibly once again when the step is deactivated. for the outputs are activated. |
True / False |
Error acknowledge active |
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True / False |
Example: Using the BBH SafePLC2 software, the parameters can be configured from the AKT2G-SDO-004-000 Properties:
Intended Use
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Caution - Risk of injury!
Safety components may only be used for these purposes:
The safety terminals expand the application range of the E-Bus terminal system with functions A function calculates a result according to the current value of its inputs. A function has no internal data and is not linked to declared instances. that enable Enable signal for the drive, Hardware-Enable with 24V signal to X8, Software-Enable command by setup Software, fieldbus or permanently set. Both are required for enabling the drive. them to be used for machine The complete assembly of all connected parts or devices, of which at least one is movable. safety applications.
- The safety terminals are designed for machine safety functions and directly The orientation components of a vector in space. associated industrial automation tasks.
- Therefore, they are only approved for applications with a defined fail-safe state.
- This safe state is the wattless state.
- Fail-safety according to the relevant standards is required.
The safety terminals enable connection of:
- 24VDC sensors A type of transducer that converts one type of energy into another for various purposes including measurement or information transfer. (AKT2G-SDI-004-000) such as emergency off push-button switches, pull cord switches, position Position means a point in space which is described by different coordinates. Depending on the used system and transformation it can consist of a maximum of six dimensions (coordinates).This means three Cartesian coordinates in space and coordinates for the orientation. In ACS there can be even more than six coordinates. If the same position is described in different coordinate systems the values of the coordinates are different. switches, two-hand switches, safety mats, light curtains, light barriers, laser scanner, etc.
- 24VDC actuators (AKT2G-SDO-004-000 such as contactors, protection door switches with tumbler, signal lamps, servo drives A special electric amplifier used to power electric servo motors. It monitors feedback signals from the motor and continually adjusts for deviation from expected behavior., etc.
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Test pulses
When selecting actuators, verify the AKT2G-SDO-004-000 test pulses do not lead to actuator switching or diagnostic message from the AKT2G-SDO-004-000.
Safety components have been developed for these tasks:
- The AKT2G-SDI-004-000 is an EtherCAT Terminal with 4 digital fail-safe inputs.
- The AKT2G-SDO-004-000 is an EtherCAT Terminal with 4 digital fail-safe outputs.
These safety components are suitable for operation on the Kollmorgen AKT2G-ECT-000-000 series Bus Couplers.
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Power supply from SELV/PELV power supply unit!
The safety components must be supplied with 24VDC by an SELV/PELV power supply unit with an output voltage limit Umax of 36VDC.
Failure to observe this can result in a loss of safety.
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Follow the machinery directive!
The safety components may only be used in machines as defined in the machinery directive.
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Ensure traceability!
The buyer has to ensure the traceability of the device via the serial number.
Technical Data
Technical Data | |
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Product Designation |
AKT2G-SDO-004-000 |
Number of outputs |
4 |
Status display |
4 (one green LED per output) |
Error reaction time |
≤ watchdog times |
Output current per channel |
With parameter current measurement active set:
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Actuators |
When selecting actuators, please ensure that the AKT2G-SDO-004-000 test pulses do not lead to actuator switching. |
Cable length between actuator and terminal |
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Wire cross section |
Minimum 0.75 mm2 |
Input process image |
6 bytes |
Output process image |
6 bytes |
AKT2G-SDO-004-000 supply voltage (PELV) |
24VDC (–15%/+20%) |
Current consumption via E-bus |
Approximately 221mA |
Power dissipation of the terminal |
Typically 2W |
Electrical isolation (between the channels) |
No |
Electrical isolation (between the channels and the E-bus) |
Yes |
Insulation voltage (between the channels and the E-bus, under common operating conditions) |
Insulation tested with 500VDC |
Dimensions (W x H x D) |
24mm x 100mm x 68mm |
Weight |
Approximately 100g |
Permissible ambient temperature (operation) up to SW 03 |
0°C to +55°C See the note in Installation Position and Minimum Distances. |
Permissible ambient temperature (operation) from SW 04 (week 02/2014) |
-25°C to +55°C See the note in Installation Position and Minimum Distances. |
Permissible ambient temperature (transport/storage) |
-40°C to +70°C |
Permissible air humidity |
5% to 95%, non-condensing |
Permissible air pressure (operation/storage/transport) |
750hPa to 1100hPa This corresponds to a height of approximately -690m to 2450m over sea level assuming an international standard atmosphere. |
Climate category according to EN 60721-3-3 |
3K3
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Permissible level of contamination according to EN 60664-1 |
Level of contamination 2 Comply with the Safety I/O Maintenance section. |
Impermissible operating conditions |
Safety terminals must not be used under these operating conditions:
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EMC immunity/emission |
Conforms to EN 61000-6-2 / EN 61000-6-4 |
Vibration/shock resistance |
Conforms to EN 60068-2-6 / EN 60068-2-27 |
Shocks |
15g with pulse duration 11ms in all three axes |
Protection class |
IP20 |
Permitted operating environment |
In the control cabinet or terminal box, with minimum protection class IP54 according to IEC 60529 |
Permissible installation position |
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Approvals |
CE, cULus |
Safety Parameters
Key Figures |
AKT2G-SDO-004-000 |
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Lifetime [a] |
20 |
Prooftest Interval [a] |
Not required 1 |
PFHD |
1.25E-09 |
%SIL3 |
1,25 % |
PFD |
8.45E-05 |
%SIL3 |
8,45 % |
MTTFd |
High |
DC |
High |
Performance level |
PL e |
Category |
4 |
HFT |
1 |
Element classification 2 |
Type B |
- Special proof tests are not required during the entire service life of the AKT2G-SDO-004-000 EtherCAT terminal.
- Classification according to IEC 61508-2:2010 (section 7.4.4.1.2 and 7.4.4.1.3)
The AKT2G-SDO-004-000 EtherCAT Terminal can be used for safety-related applications within the meaning of IEC 61508:2010 up to SIL3 and EN ISO 13849-1 up to PL e (Cat4).
For the calculation or estimation of the MTTFd value from the PFHD value, more information is in ISO 13849-1:2015 Table K.1.
Dimensions
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Figure 2: Dimensions of the AKT2G-SDO-004-000
Block Diagram
Figure 3: Block Diagram of the AKT2G-SDO-004-000
The block diagram shows the basic configuration of a channel in the AKT2G-SDO-004-000.
- The part with a red border is present four times in the terminal.
- The high-side and low-side switches only exist once for all channels.
- This means that each channel has a total of four stop paths Set of continuous positions and orientation information in multi-dimensional space. Geometrical description of a space curve that the TCP of an axesgroup moves along..
Pin Assignment
Figure 4: AKT2G-SDO-004-000 Pin Assignment
Pin Assignment - AKT2G-SDO-004-000 | ||
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Terminal Point | Output | Signal |
1 |
- |
not used, no function |
2 |
positive power contact |
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3 |
- |
negative power contact |
4 |
not used, no function |
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5 |
- |
not used, no function |
6 |
positive power contact |
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7 |
- |
negative power contact |
8 |
not used, no function |
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1’ |
1 |
Output 1+ |
2’ |
Output 1- |
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3’ |
3 |
Output 3+ |
4’ |
Output 3- |
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5’ |
2 |
Output 2+ |
6’ |
Output 2- |
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7’ |
4 |
Output 4+ |
8’ |
Output 4- |
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Test Pulses
When selecting actuators, verify the AKT2G-SDO-004-000 test pulses do not lead to actuator switching or diagnostic message from the AKT2G-SDO-004-000.
Signal Cables
Permitted Cable Length
Figure 5: Permitted Cable Length
When connecting a single switching contact via its own continuous cabling (or via a non-metallic sheathed cable), the maximum permitted cable length is 100m.
The use of contact points, connectors or additional switching contacts in the cabling reduces the maximum propagation.
Cable Routing
Figure 6: Cable Routing
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Route the signal cable separately!
The signal cable must be routed separately from potential sources of interference (e.g., motor An actuator focused to a movement, converting electrical energy in a force or torque. supply cables, 230 VAC power cables etc.)!
Interference caused by cables routed in parallel can influence the signal form of the test pulses and thus cause diagnostic messages (e.g., sensor errors or OpenLoad errors).
- D: Distance between the cable ducts should be as large as possible.
- Blue arrows: signal line.
- Red arrows: potential source of interference.
The common routing of signals, together with other clocked Clock signal. signals in a common cable, also reduces the maximum propagation, since crosstalk of the signals can occur over long cable lengths and cause diagnostic messages.
The test pulses can be switched off (sensor test parameter) if the connection of a common cable is unavoidable. However, this leads to a reduction in the degree of diagnostic cover when calculating the performance level.
Test Pulses
The typical length of test pulse (switching from 24 V to 0 V and back to 24 V) is 300µs to 800µs.
Testing usually takes place 5 to 7 times per second.
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Test pulses for the outputs
This diagram shows a typical test pulse curve for the four outputs of an AKT2G-SDO-004-000.
The parameters Current measurement active and Testing of outputs active are enabled.
Figure 7: Typical course of test pulses of the outputs.