Drive String Connection
MKD-C support three strings to connect up to 42 drive axes: System topology of an MKD drive system. The strings are built of a DC-Bus and an internal fieldbus connection.
The DC-Bus is powered with 565 VDC to 680 VDC depending on the mains voltage in standard operation.
If the 3 phase mains voltage is not available, a 55 VDC stand-by power is available from the 24 VDC supply for emergency ramp down or brake situations.
Cable which exit the cabinet, should be threaded through grommets.
To ensure protection class IP67, Kollmorgen recommends cable entry system KDL/S combined with cable entry grommet KDT/S manufactured by:
Murrplastik Systemtechnik GmbH
Fabrikstraße 10
71570 Oppenweiler, Germany
Phone: +49 (0)7191 482-0
Website: www.murrplastik.de
E-Mail: [email protected]
String 1 (central)
String 1 can be used for connecting central MKD-N drive modules with up to 14 axes.
MKD-N drives modules are connected via sliding terminals (X23, DC Power) and a short fieldbus cable (X22-X27, X28-X27, Fieldbus) to string 1. The string is limited to 30 kW rated power.
DC power (X23)
The DC power lines supply DC power for up to 14 MKD-N drives in string 1. Connection for the DC power must be done by a sliding terminals (X23).
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Local Fieldbus (X22, X27, X28)
Local fieldbus connector enables the MKD-C (X22) to communicate with all connected MKD-N via a four line bus medium. Front and RJ45 LED signals LED signals.
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MKD-C |
MKD-N |
MKD-N |
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X22 to X27 or X28 to X27 are connected via the short EtherCAT Module cable Cables.
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Pin |
Signal |
Description |
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1 |
Tx+ |
Transmit + |
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2 |
Tx - |
Transmit - |
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3 |
Rx + |
Receive + |
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6 |
Rx - |
Receive - |
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These port may not be directly connected to standard EtherCAT or Ethernet TCP/IP nodes. |
Strings 1 and 2 (central)
The number of central drive axescan be duplicated by using string 2 as an internal string.
- MKD-N drive modules in string 1 are connected via slider terminals (X23, DC Power) and a short fieldbus cable (X22-X27, X28-X27, Fieldbus) to string 1.
- MKD-N drive modules in string 2 are connected via sliding terminals (X23, DC Power) and a fieldbus adapter cable (X21A-X28, Fieldbus) . The combined strings 1 and 2 are limited to 30 kW rated power.
DC power (X23)
The DC power lines supply DC power for up to 28 MKD-N drives in string 1 and string 2. Connection for the DC power must be done by a sliding terminals (X23).
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Local Fieldbus (X21A, X27)
String 2 fieldbus connector X21A enables the MKD-C to communicate with all connected MKD-N via a four line bus medium.This interface is connected to X27 via the Communication Adapter String 2 Cables. Front and RJ45 LED signals LED signals.
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MKD-C |
MKD-N |
MKD-N |
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Pin |
Signal |
Description |
|---|---|---|
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1 |
Rx + |
Receive + |
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2 |
Rx - |
Receive - |
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3 |
Tx + |
Transmit + |
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6 |
Tx - |
Transmit - |
Strings 2 and 3 (decentral)
Strings 2 and 3 can be used for connecting up to 28 decentral AKD-N drives. Refer to the AKD-N Installation Manual for technical description of these drives. Every string is limited to 10 kW rated power.
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For connecting the first AKD-N to one of the DC strings the Kollmorgen cable type MKC-HYB-z-AKN must be used. This cable is a Y type adapter with one hybrid connector on the AKD-N end and two connectors on the MKD-C end with separate DC power and local fieldbus lines. The Kollmorgen hybrid cable AKN-HYB-z-AKN must be used to connect more AKD-N. The Kollmorgen hybrid cables are described in the appendix Cables. |
The DC power lines supply DC power for up to 14 AKD-N drives in one string. Connection for the DC power must be done by a mating connector with strain relief due to EMC reasons. This interface is connected via the Kollmorgen MKC-HYB-z-AKN cable.
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X20A supports String 2, X20B supports String 3 |
Local fieldbus connectors separate for each string enable the MKD-C to communicate with all connected AKD-N via a four line bus medium.This interface is connected via the Kollmorgen MKC-HYB-z-AKN cable. Front LED signals LED signals.
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X21A supports String 2, X21B supports String 3 |
