Programmable Logic Controller Guide: Selection, Application, and Maintenance for Engineers
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- Part number
- 1SAP222100R0001
- Model no
- CI521-MODTCP
Communication interface modulesABB 1SAP222100R0001 CI521-MODTCP Modbus TCP 4AI 2AO 8DI 8DO Remote I/O Module
ABB CI521-MODTCP Modbus TCP interface module, 4 AI, 2 AO, 8 DI, 8 DO, extendable, IP20.
Description
About the CI521-MODTCP
About the CI521-MODTCP
The ABB 1SAP222100R0001 (CI521-MODTCP) is a Modbus TCP server interface module for the S500 I/O system, combining 4 analog inputs, 2 analog outputs, 8 digital inputs, and 8 digital outputs at the head of the station. Up to 10 further S500 I/O modules extend it, and the housing is rated IP20 on a 20.4-28.8 V DC supply.
Selection Notes
CI521-MODTCP carries the same 4 AI, 2 AO, 8 DI, 8 DO onboard mix as the PROFINET and EtherCAT head modules in this family, but speaks Modbus TCP server instead, which fits plants or skids where Modbus TCP is already the standard SCADA or PLC protocol rather than PROFINET or EtherCAT. It does not list the cam-switch function that the EtherCAT variants of this family carry, so applications needing that capability should specify EtherCAT instead. As with the rest of the family, up to 10 additional S500 I/O modules extend the station beyond the onboard channel count.
Specification
Full specification
Dimensions 9
| Product Net Weight | 0.136 kg |
|---|---|
| Product Net Depth / Length | 62 mm |
| Product Net Height | 76 mm |
| Product Net Width | 67.5 mm |
| Gross Weight | 0.159 kg |
| Package Level 1 Depth / Length | 84 mm |
| Package Level 1 Height | 72 mm |
| Package Level 1 Width | 71 mm |
| Package Level 1 Units | carton 1 piece |
Technical 17
| Function | Modbus TCP server. 4 AI: U, I, RTD. 2 AO: U, I. 8 DI: 24VDC. 8 DO: 24VDC 0.5A |
|---|---|
| Number of Hardware Interfaces | Industrial Ethernet 0, Other 0, Parallel 0, RS-232 0, RS-422 0, RS-485 0, Serial TTY 0, USB 0, Wireless 0 |
| Analog Inputs | 4 |
| Analog Outputs | 2 |
| Number of Digital Inputs | 8 |
| Number of Digital Outputs | 8 |
| Number of Digital Configurable I/Os | 0 |
| Input Voltage Type | DC |
| Input Voltage (Uin) | 24 V DC |
| Input Current | 5 mA |
| Delay Time (τ) | 0.1 … 32 ms |
| Output | Transistor |
| Output Voltage Type | DC |
| Output Current | 0.5 A |
| Output Voltage Maximum | 20.4 … 28.8 V |
| Degree of Protection | IP20 |
| Supply Voltage | 20.4 ... 28.8 V DC |
Additional Information 2
| Product Main Type | CI521 |
|---|---|
| Product Name | Distributed Automation I/Os |
Show all 50 specifications ↓ Show less ↑22 more values in Identification, External Classifications and Standards, Environmental, Logistics.
Identification 13
| Part number | 1SAP222100R0001 |
|---|---|
| Type designation | CI521-MODTCP |
| Brand | ABB |
| Condition | New, factory sealed |
| Source | ABB and its authorised distributors |
| Warranty | Manufacturer warranty |
| EAN | 4013614485916 |
| ETIM class | EC001604 |
| CN8 | 85389091 |
| Invoice Description | Interface module. Modbus TCP server. 4 AI: U, I, RTD. 2 AO: U, I. 8 DI: 24VDC. 8 DO: 24VDC 0.5A (CI521-MODTCP) |
| Minimum Order Quantity | 1 piece |
| Order Multiple | 1 piece |
| Selling Unit of Measure | piece |
External Classifications and Standards 3
| eClass | 27-24-26-07 |
|---|---|
| ETIM 10 | EC001604 - Fieldbus, decentr. periphery - communication module |
| UNSPSC | 32151705 |
Environmental 2
| WEEE B2C / B2B | Business To Business |
|---|---|
| WEEE Category | 5. Small Equipment (No External Dimension More Than 50 cm) |
Logistics 4
| Shipping weight | 0.136 kg |
|---|---|
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 02 Oct 2026
Documents
Documents for 1SAP222100R0001
No documents are on file for this part yet.
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Quick answers
Questions about the CI521-MODTCP
What is the HS code of CI521-MODTCP for customs?
The tariff (HS) code on file for CI521-MODTCP is 853710.
What is the EAN of CI521-MODTCP?
The EAN (GTIN) of CI521-MODTCP is 4013614485916.
Where does CI521-MODTCP ship from, and how fast?
CI521-MODTCP ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
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ABB Communication interface modules
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