ABB SPNIS21 Network Interface Module for Cnet Communication
ABB PLC network interface module
Cnet communication interface module
ABB SPNIS21 network module
Place of Origin:
SWEDEN
Brand Name:
ABB
Model Number:
SPNIS21
ABB PLC network interface module
,Cnet communication interface module
,ABB SPNIS21 network module
ABB SPNIS21 Network Interface Module for Cnet Communication
SPNIS21 is a Network Interface Module used as the intelligent link between system nodes and ABB Cnet. It works with the SPNPM22 network processing module within the Harmony communication architecture.
The Cnet side of the interface
SPNIS21 has a dedicated communication role within ABB's Harmony architecture, providing the network interface between a system node and Cnet.
ABB describes SPNIS21 as the front end of the Cnet communication interface. It provides the intelligent link between nodes and Cnet, allowing nodes on the network to communicate with one another.
The module works in conjunction with SPNPM22. Together, these modules form the principal hardware of the Cnet-to-HCU interface described by ABB.
ABB's Symphony Plus Product Catalog specifies a +5 VDC power requirement of 825 mA and 4.1 W typical power consumption. Cnet communication rates are specified as 10 MHz or 2 MHz.
Follow the communication path
SPNIS21 and SPNPM22 occupy different positions in the communication architecture. Keeping those functions separate is important when identifying existing hardware.
A system node participating in the Cnet communication architecture.
Intelligent link between the node and Cnet.
ABB high-speed serial control network.
Provides the Cnet-facing network interface for the node.
Works with SPNIS21 and acts as the gateway between Cnet and Controlway.
Core technical data
Key parameters below are limited to values confirmed in ABB documentation for SPNIS21.
Built around the network interface
The SPNIS21 hardware is centered on its Cnet interface function and its relationship with the associated network-processing hardware.
Local status information
ABB documentation gives the module a local diagnostic interface for monitoring operating and communication status.
The NIS21 documentation describes 16 faceplate LEDs used to display event or error counts and error codes.
A separate Status LED indicates the operating status of the module, while a Stop/Reset button is provided on the faceplate.
Designed for plant-wide Cnet communication
The role of SPNIS21 becomes clearer at network level, where Cnet connects system nodes across the control architecture.
Central and satellite Cnets
ABB describes Cnet as a high-speed serial data network operating at 10 MHz or 2 MHz. A central network can support up to 250 system node connections.
Multiple satellite Cnets can link to the central network, with each satellite network supporting up to 250 system node connections.
ABB states that the overall system capability can exceed 62,000 nodes when the maximum number of satellite networks is used.
Communication interface configurations
ABB's catalog lists SPNIS21 within communication interface configurations and bundled hardware arrangements.
ABB communication interface hardware
ABB's product catalog lists SPNIS21 as part of the SPIIL02-L bundled communication interface configuration.
The configuration includes communication module cables, NTCL01 communication termination units, SPIIT13, IEMMU21 and NFTP01.
For an existing installation, the surrounding hardware should therefore be checked before sourcing an individual module.
Confirm the exact module designation
Use the complete SPNIS21 designation when preparing an RFQ or checking installed Harmony rack hardware.
Manufacturer: ABB
Product Type: Network Interface Module
Communication Network: Cnet
System: Symphony Plus / Harmony rack communication
Associated Module: SPNPM22
Give the exact system context
For industrial communication hardware, the part number should be accompanied by the installation context whenever available.
For SPNIS21 enquiries, provide the exact part number, required quantity and destination first.
If the module is being sourced for an existing Cnet installation, include the machine or system information and any known associated module such as SPNPM22.
If the requirement involves an existing communication interface configuration, mentioning the surrounding hardware can help speed up quotation review.
SPNIS21 RFQ
Send the following information to AMIKON Industrial Automation.
SPNIS21 questions
Product-specific questions based on the documented communication function.
What is the ABB SPNIS21 used for?
SPNIS21 is a Network Interface Module used as the intelligent link between system nodes and the Cnet communication network.
Does SPNIS21 work with SPNPM22?
Yes. ABB identifies SPNPM22 as the network processing module that works with SPNIS21 in the Cnet communication architecture.
What Cnet communication rates are specified?
ABB's Symphony Plus Product Catalog specifies Cnet communication rates of 10 MHz or 2 MHz for SPNIS21.
What power requirement does SPNIS21 have?
ABB specifies +5 VDC at 825 mA, with 4.1 W typical power consumption.
What information should I provide for an SPNIS21 quotation?
Please provide the exact part number, quantity, destination, required date, machine and system information. Send the RFQ to sales@amikon.cn.
Industrial automation models
Selected models across ABB, Siemens and other major industrial automation brands. Listed for product browsing, not as SPNIS21 replacements.
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