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ABB CI521-MODTCP AC500 Modbus TCP I/O Module
ABB CI521-MODTCP AC500 Modbus TCP I/O Module
ABB CI521-MODTCP AC500 Modbus TCP I/O Module

ABB CI521-MODTCP AC500 Modbus TCP I/O Module

ABB AC500 / S500 · Modbus TCP

CI521-MODTCP

The ABB CI521-MODTCP is an AC500/S500 Modbus TCP server interface with two 10/100BASE-TX ports, 8 DI, 8 DO, 4 AI and 2 AO. It supports S500 remote-I/O expansion and IP configuration through ABB’s tool plus the front rotary switches.

NETWORKModbus TCP
ETHERNET2 × RJ45 · 10/100 Mbps
EXPANSIONUp to 10 S500 Modules
SUPPLY24 V DC
MANUFACTURERABB
CONDITION / WARRANTYOriginal New · One-Year Warranty
ISO CERTIFICATIONISO-Certified Product
VERIFICATION● Product photos and videos provided after inquiry
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ABB ↗MODBUS TCP SERVER
AC500 / S500 COMMUNICATION INTERFACE

CI521-MODTCP

1SAP222100R0001

Modbus TCP server interface · 2-port 10/100BASE-TX switch · 8 DI · 8 DO · 4 AI · 2 AO.

PRODUCT ROLE

CI521-MODTCP makes its integrated analog and digital I/O plus compatible S500 expansion available to a Modbus TCP client through two switched RJ45 ports.

CONFIGURATION NOTE

Confirm order number 1SAP222100R0001, standard or XC version, IP settings, Modbus register mapping, byte order, 24 V DC wiring and connected S500 modules before replacement.

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EMAILsales5@mooreplc.com WHATSAPP+86 153 5940 8275
ORDER NUMBER BREAKDOWN

How the CI521-MODTCP order number is structured

CI521
Module familyCommunication interface
MODTCP
Network variantModbus TCP
1SAP222100R0001
ABB order numberComplete article reference
VERIFIED MANUFACTURER-REFERENCE DATA

Technical Specifications

ABB CI521-MODTCP ↗
General Information−
BrandABB
ModelCI521-MODTCP
Order number1SAP222100R0001
Product typeModbus TCP communication interface module
Product familyAC500 / S500
Product lifecycleActive
Supported expansionUp to 10 S500 I/O modules
Modbus TCP and Ethernet Data+
Protocol roleModbus TCP server
Ethernet interface10/100BASE-TX with integrated switch
Connections2 × RJ45 sockets
IP configurationABB IP configuration tool plus two front rotary switches
Rotary-switch rangeLast IP-address byte, 00h to FFh
Input process data20 bytes
Output process data24 bytes
Integrated I/O Data+
Digital inputs8 × 24 V DC
Digital outputs8 × 24 V DC, 0.5 A maximum per channel
Analog inputs4 configurable channels for supported voltage, current and RTD modes
Analog outputs2 configurable voltage or current channels
Process data20 bytes input / 24 bytes output
Fast counterIntegrated; use ABB’s corresponding sample project and mapping
Status indication32 LEDs
Power and Installation+
Process supply24 V DC for inputs and outputs
Maximum terminal load10 A
Rated protection fuse10 A, fast
Maximum power dissipation6 W
MountingHorizontal or vertical with stated derating
CoolingNatural convection; ventilation must not be obstructed
Terminal unitTU507-ETH or TU508-ETH
Normal current consumption0.2 A via UP in normal operation
Compatibility and Diagnostics+
Client requirementCompatible Modbus TCP client/master; CI521-MODTCP operates as the server
Supported I/O familiesS500 and S500-eCo for supported remote-I/O architectures
Hot-swap limitationHot-swap configurations use S500; S500-eCo and S500-S are not listed
Controller connectionAC500 onboard Ethernet or CM5640-2ETH in documented architectures
Required terminal unitTU507-ETH or TU508-ETH
Lifecycle phaseActive; standard and XC order variants are separate

Source: ABB CI521-MODTCP data sheet 3ADR010003, ABB product page for 1SAP222100R0001, and ABB Automation Builder compatibility information. Values apply under ABB’s stated operating conditions.

FAQ

Questions Buyers Ask Most

What does CI521-MODTCP do in a remote-I/O station?+
CI521-MODTCP is an ABB Modbus TCP server interface that makes its 8 DI, 8 DO, 4 AI, 2 AO and compatible S500 expansion available to a Modbus TCP client. It uses two switched 10/100BASE-TX ports and requires a matching IP plan, register mapping and 24 V DC process supply.
Is CI521-MODTCP a Modbus TCP client or server?+
CI521-MODTCP operates as a Modbus TCP server, not as the client that initiates I/O transactions. A compatible PLC or host must act as the client/master, and its register addresses, write permissions, timeout behavior and byte order must match the CI521 configuration.
Which analog signals can CI521-MODTCP handle?+
The four analog inputs on CI521-MODTCP support ABB-documented voltage, current and RTD configurations, while the two analog outputs support configured voltage or current modes. The exact range, shared reference potential, sensor isolation, channel wiring and software parameters must be confirmed before connection.
How is the IP address set on CI521-MODTCP?+
CI521-MODTCP uses ABB’s IP configuration tool together with two front rotary switches; the switches set the last byte from 00h to FFh. They do not define the complete IP address by themselves, so the remaining network settings and any write-restriction IP list must be checked in the Modbus configuration.
What process-data size and byte order apply to CI521-MODTCP?+
CI521-MODTCP uses 20 bytes of input process data and 24 bytes of output process data for its integrated I/O and fast-counter structure. ABB notes that BYTE and DWORD values must be swapped when commissioning against big-endian communication, while analog values are not swapped; the client mapping must therefore be verified field by field.
Can CI521-MODTCP use S500-eCo or S500-S expansion?+
CI521-MODTCP supports S500 and S500-eCo in ABB’s documented high-availability remote-I/O architectures, with up to 10 I/O modules. For hot-swap configurations ABB lists S500 only, and S500-S safety I/O is not listed as compatible, so the application type and module family must be confirmed before expansion.
Are CI521-MODTCP and CI521-MODTCP-XC the same order configuration?+
No. Standard CI521-MODTCP uses order number 1SAP222100R0001, while CI521-MODTCP-XC uses 1SAP422100R0001 for enhanced ambient conditions. Their Modbus TCP and I/O functions are related, but the environmental rating, nameplate, order number and installation conditions must match the required application.
What should be recorded before replacing CI521-MODTCP?+
Before replacing CI521-MODTCP, record the full order number, standard/XC version, IP address, rotary-switch positions, Modbus mapping, byte order, allowed writer IPs, timeout settings, analog ranges, TU507-ETH or TU508-ETH terminal unit and connected S500 sequence. Remove all supply and process voltage before module removal.
What lifecycle phase does ABB list for CI521-MODTCP?+
ABB lists CI521-MODTCP, order number 1SAP222100R0001, as Active; the XC order variant is also listed as Active. Lifecycle status does not guarantee a particular stock level or direct compatibility, so order variant, firmware/application data and wiring still require confirmation.
CONTACT PRODUCT SPECIALIST

Confirm your CI521-MODTCP configuration with Frida

Share the complete order number, standard or XC version, IP plan, Modbus mapping and connected S500 I/O arrangement for compatibility, availability and lead-time checking.

CHOOSE A DIRECT CONTACT METHOD
OFFICIAL DATASHEET

ABB CI521-MODTCP Product Information

Official ABB product and technical data for CI521-MODTCP, complete order number 1SAP222100R0001.

CI521-MODTCP Technical Data

ABB documents CI521-MODTCP as a Modbus TCP server communication interface with 4 analog inputs, 2 analog outputs, 8 digital inputs and 8 digital outputs. It uses a two-port 10/100BASE-TX switch, supports a fast counter and is available in standard and XC order variants.

OFFICIAL DATASHEET ↗

Contact to Get Support

Send the complete model, quantity, network configuration and your technical or purchasing question.

✉ EMAIL
sales5@mooreplc.com◉ WHATSAPP
+86 153 5940 8275

Source: ABB 3ADR010003 and ABB official product page for 1SAP222100R0001; lifecycle phase is listed as Active.

AC500 / S500 SYSTEM RELATIONSHIP

How CI521-MODTCP fits into the ABB AC500/S500 system

ABB ↗ is the brand, AC500/S500 is the automation platform, CI521-MODTCP is the complete module model, Modbus TCP communication interface module is the product type, and 1SAP222100R0001 is the standard order configuration.

BRAND / PLATFORMABB AC500 / S500
→
COMPLETE MODELCI521-MODTCP
→
CONFIGURATION / SYSTEMModbus TCP · 1SAP222100R0001
Protocol Role

Modbus TCP server for remote I/O access.

Network Topology

Two switched 10/100BASE-TX RJ45 ports.

Integrated I/O

8 DI, 8 DO, 4 AI and 2 AO.

Station Expansion

Up to 10 compatible S500 I/O modules.

SYSTEM APPLICATIONS

Where CI521-MODTCP fits in the control architecture

Modbus TCP Server

Publishes process and diagnostic data to a compatible client.

Mixed-Signal Remote I/O

Combines digital channels with configurable analog input and output ranges.

High-Availability Architecture

Supports documented AC500 Ethernet arrangements with compatible S500 modules.

Fast Counter

Provides counter data through the specified Modbus process mapping.

ABOUT MOORE AUTOMATION

A trusted industrial automation sourcing partner

Moore Automation Limited supplies industrial automation spare parts to customers worldwide, with dedicated sourcing, part-number verification, pre-shipment confirmation and responsive sales support.

Global sourcing Pre-shipment verification One-year warranty
SERVICE

Industrial Automation Order Support

A clear workflow for sourcing, verification, shipment preparation, delivery and product assurance.

STAGESERVICE ACTIONWHAT WE CHECK OR PROVIDE
01PROCUREMENT
Product SourcingCurrent, hard-to-find and discontinued industrial automation parts.
02VERIFICATION
Part Number ReviewComplete model, suffix, nameplate, visible revision and application details.
03CONFIRMATION
Pre-Shipment CheckModel, label, condition and packaging confirmed with actual photos or video.
04FULFILLMENT
Global Delivery
Worldwide delivery with flexible shipping options. We support door-to-door pickup or delivery to your nominated freight forwarder in China.
DHLFedExUPSTNT
05ASSURANCE
One-Year WarrantyOne-year warranty from delivery for products supplied by Moore Automation.
Warranty Claim Information＋
What to provide: If a product-related issue occurs within the warranty period, contact our team and submit one clear, continuous video for review.
✓Complete product and nameplate
✓Power supply and wiring connections
✓Installation and operating conditions
✓Indicator lights, alarms or error messages
✓Clear description of the fault
✓Continuous video showing the issue
Review outcome: If the evidence confirms a covered product fault, Moore Automation will arrange the appropriate warranty solution.
SALES ASSISTANCE

Contact Sales Manager Frida

Include the complete part number, quantity and delivery destination.

EMAILsales5@mooreplc.com WHATSAPP+86 153 5940 8275
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Hot Tags : ABB CI521-MODTCP 1SAP222100R0001 AC500 Modbus TCP I/O S500 Modbus TCP server 4 AI 2 AO 8 DI 8 DO CI521-MODTCP manual
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