Siemens 6DS1220-8AA
Siemens 6DS1220-8AA
Siemens 6DS1220-8AA
Siemens 6DS1220-8AA
Siemens 6DS1220-8AA
Siemens 6DS1220-8AA
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6DS1220-8AA

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Siemens 6DS1220-8AA is the TELEPERM M N8-H 8-bit interface module for the 20 m CS275 local bus in AS 235 H systems.
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Technical specifications for 6DS1220-8AA

  • Manufacturer:
    Siemens
  • Part Number:
    6DS1220-8AA
  • Product Family:
    Siemens Teleperm
  • Product Type:
    TELEPERM M N8-H Local-Bus Interface Module
  • Stock:
    1
  • Local-bus range:
    20 m
  • Data width:
    8 bit
  • CS275 role:
    1oo2 master/reserve local-bus interface
  • Participant address range:
    1-63
  • Addressing method:
    Hardware jumpers
  • Forbidden address combination:
    Bus address 0 with participant address 0
  • Redundant CPU setting:
    CPU I and CPU II addresses must match
  • Weight:
    0.75 kg
  • Estimated shipping dimensions:
    24.3x18.2x3cm
  • Tariff Code:
    Please confirm the destination before shipping
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals CS275 Bus Role N8-H Addressing Redundant Operation Product Applications

Features:

  • 20 m local-bus interface: Connects the N8-H module to the documented CS275 local-bus arrangement.
  • Master/reserve operation: Supports the two-CPU AS 235 H architecture with one active bus master.
  • Hardware addressing: Uses bus and participant settings that must agree across both CPU paths.
The N8-H interface is an 8-bit local-bus module with a participant-address range of 1 to 63.

A mastership change re-parameterizes the local-bus interface, so both CPU-side modules and settings must remain available.

Service planning therefore treats the CPU pair, both N8-H modules, and the local-bus distribution path as one communication chain.

Apter Power supports Siemens 6DS1220-8AA TELEPERM M N8-H Local-Bus Interface Module quotations, technical documents, and procurement support.
Siemens 6DS1220-8AA TELEPERM M N8-H Local-Bus Interface Module Manuals,Datasheets,Link
Important Notice: Manuals and supporting documents are provided for identification and engineering review. Confirm the complete product code before ordering.
  • Local-bus connection: Links the AS 235 H to the 20 m CS275 local bus.
  • Active master: Only the interface associated with the master CPU communicates on the bus.
  • Distribution unit: The module works through the documented local-bus distribution path.
  • System exchange: The CS275 path supports communication with connected automation and operator systems.
  • Participant range: Valid participant addresses are 1 through 63.
  • Zero restriction: Bus address 0 and participant address 0 must not be used together.
  • CPU agreement: CPU I and CPU II require identical bus and participant settings.
  • Replacement continuity: The incoming N8-H module should retain the approved bus and participant address plan.
  • Module pair: Two local-bus modules are used in the redundant AS 235 H arrangement.
  • Mastership change: The standby side can assume communication after the CPU role changes.
  • Re-parameterization: The interface is re-parameterized when mastership changes.
  • Fault isolation: Both CPU paths and the distribution route form one communication chain.
  • AS 235 H communication: Provides the N8-H connection between the controller and CS275 local bus.
  • Master/reserve systems: Supports the documented 1oo2 CPU architecture.
  • Legacy cabinet maintenance: Maintains an established N8-H position and address plan.
  • N-AS migration baseline: Provides the installed configuration record for an engineered successor review.
Description
The Siemens 6DS1220-8AA is the N8-H 8-bit interface module for the 20 m TELEPERM M local bus. In an AS 235 H system it provides the CS275 communication path used by the active master CPU to exchange data with connected automation and operator systems.

A redundant AS 235 H normally uses two 6DS1220-8AA modules so the standby CPU can assume bus communication after a mastership change. Both CPU paths must retain identical bus and participant settings, while the installed distribution unit and cable route remain within the documented local-bus limits.

Address commissioning for 6DS1220-8AA remains tied to the installed AS 235 H cabinet and CPU pairing. Preserving the approved bus plan across both processor paths reduces the risk of a replacement remaining offline after mastership transfer. Apter Power can provide legacy quotations, official documents, and cabinet-level matching guidance.
Alternative Names
6DS12208AA 6DS 1220-8AA 6DS1220 8AA 6DS122O-8AA 6DSI220-8AA N8-H 6DS1220 Siemens N8-H TELEPERM M 6DS1220
Technical notes
The critical distinction for 6DS1220-8AA is between the address jumpers used on the bus-interface section and the internal bus-processor jumper pattern that Siemens factory sets. Preserve the installed bus and participant addresses, keep CPU I and CPU II identical, and never copy an address plan by moving the factory bus-processor jumpers.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
How does 6DS1220-8AA operate in a redundant AS 235 H system?
Two N8-H modules support the master and standby CPU paths, while only the active master communicates on CS275.
What should a buyer match before sourcing 6DS1220-8AA for an installed cabinet?
Match the complete article number, N8-H designation, AS 235 H cabinet, CPU path, and installed bus and participant address plan.
Why can 6DS1220-8AA remain offline after a board exchange?
Mismatched bus or participant addresses, a forbidden zero combination, unequal CPU settings, cable faults, or a distribution-unit problem can block communication.
What should be checked when 6DS1220-8AA loses communication during a mastership change?
Verify that both modules are installed, CPU I and CPU II use identical settings, and both local-bus paths remain connected.
Can 6DS1220-8AA and 6DS1223-8AA be used in the same AS 235 H system?
Siemens documents a mixed N8-H and N-AS arrangement as permissible, but the cabinet design and addressing must still be reviewed.
What electrical boundary applies to the local bus connected to 6DS1220-8AA?
Keep the local-bus route within 20 m and the earth-potential difference within the documented 0.2 V limit.
Can 6DS1220-8AA be replaced automatically by a 6DS1223-8AA N-AS module?
The manual positions N-AS as the successor, but wiring, addressing, connectors, redundancy, and project approval must be checked before migration.