Description
Product Introduction
The ABB CI820V1 (3BSE025255R1) is an Advant Fieldbus 100 (AF100) Fieldbus Communication Interface (FCI) specifically designed to bridge S100 I/O subracks and legacy drive systems into ABB System 800xA and Advant OCS control architectures. Mounted on a dedicated terminal base assembly, it allows AC 400 series or AC 800M controllers to communicate deterministically with legacy S100 I/O hardware across AF100 backbones.
Engineers rely on the CI820V1 during plant modernization projects to avoid the immense capital cost of rip-and-replace wiring. By converting high-speed AF100 fieldbus frames into native S100 I/O rack bus protocols, the CI820V1 allows facilities to upgrade central controllers while keeping existing field wiring, terminal blocks, and S100 I/O racks completely intact.
Key Technical Specifications
| Parameter | Specification |
| Full Part Number | CI820V1 (3BSE025255R1) |
| Fieldbus Protocol | Advant Fieldbus 100 (AF100) |
| Baud Rate | 1.5 Mbps (deterministic AF100 rate) |
| Nominal Supply Voltage | 24 V DC (19.2 to 30 V DC range) |
| Power Consumption | Max 200 mA at 24 V DC |
| Target Hardware Compatibility | S100 I/O Subracks / Advant Controller Systems |
| Compatible Baseplate | TU810V1, TU812V1, or dedicated S100 interface bases |
| Addressing Method | Rotary switches for AF100 station address assignment |
| Power Dissipation | Approx. 4.5 W internal |
| Operating Temperature | 0°C to +55°C (32°F to 131°F) |
Application Scenarios & The “Trench” Experience
A paper mill in Oregon ran into a critical situation when the primary communication gateway feeding an I/O rack on a paper machine calendar stack dropped offline. The central controller lost feedback from 32 analog pressure and temperature channels, instantly halting the reel drive. The shift electrician unseated the damaged CI820V1, matched the station address rotary dials on the replacement unit, and snapped it into the base frame. The bus re-established communication in under a minute, restoring rack mapping and bringing the calendar stack back online without a costly cold restart.
- Pulp & Paper – Paper Machine Sectional Drives – Bridges central AC 800M controllers over to legacy I/O racks controlling web tension and roll pressure.
- Metals & Steel Mills – Hot Strip Mill Automation – Maintains high-speed control handshakes between modern DCS hardware and existing I/O valve manifolds.
- Power Generation – Legacy Turbine Upgrades – Serves as the migration gateway when retrofitting central turbine management systems while retaining field wiring.
Transparency SOP: Quality Assurance & Testing
We test every CI820V1 module on an active and I/O test rig before clearing it for static-shielded storage:
- Inbound Pin & Housing Inspection: We check multi-pin backplane connectors under magnification for bent or oxidized pins, examine the plastic casing for thermal stress cracks, and verify original ABB serial tags.
- Power Rail & Initialization Test: Connect 24 V DC to verify internal DC-DC converter startup, logic rail stability, and front panel LED diagnostic cycles.
- Network Loopback: Connect the card to an active bus segment to verify token passing, deterministic data throughput, and zero CRC frame errors.
- Rack Communication Check: Interface the unit with a live I/O rack to confirm bus buffering, signal translation accuracy, and diagnostic pass-through back to the host CPU.
- Clean & Anti-Static Sealing: Contacts are cleaned with electrical solvent, sealed in thick static-shielding bags, and packed with fresh moisture-absorbing desiccant.
- 3BSE025255R1
- 3BSE025255R1
The Veteran’s Tech Trap Guide (Crucial Value-Add)
⚠️ Match Address Dials Before Powering Up: The reads its station address hardware settings from the rotary switches only during boot-up. If you adjust the switches while 24 V DC power is live, the card will ignore the change and remain on its old node address until power is cycled.
❗ Check the Modem Assembly (TC512 / TC516): If the replacement shows a persistent bus error (LINE FAULT), don’t assume the card is dead. The external physical layer modems (TC512 or TC516) attached to the cable drop are frequently damaged by field transients before the FCI card itself fails.
⚠️ Do Not Force Board Insertion: The multi-pin bus connectors on the rear of the must align perfectly with the mating socket on the terminal base. Forcing the module into the slot at an angle will bend the fine gold-plated pins, causing hard backplane communication faults.
Frequently Asked Questions (FAQ for Conversion)
Q: What is the main difference between the and the CI810B?
A: While both are Fieldbus Communication Interfaces, the CI810B is designed to manage local S800 I/O modules via ModuleBus, whereas the is engineered specifically as an interface gateway to control legacy I/O racks and drive subracks.
Q: Can I hot-swap the during live production?
A: You can physically pull the module, but doing so will instantly drop communication to the entire connected I/O rack. Make sure all downstream process loops are placed into manual or safe states before unseating the card.
Q: Does the require firmware flashing before installation?
A: No. The operational firmware is permanently stored onboard. Upon network connection, the host controller (AC 400 or AC 800M) passes down system configuration and signal mapping parameters automatically during boot-up.
Q: Are brand new factory modules available from ABB?
A: No. ABB has long since moved the CI820 series to legacy/discontinued status. Our stock consists of certified “New Surplus” units (unused original plant spares) and fully reconditioned, bench-tested refurbished units.
Q: What warranty comes with this module?
A: Every (3BSE025255R1) module supplied by our team is backed by a full 12-month advance replacement warranty. If the unit fails or exhibits communication faults within one year, we ship a replacement immediately.
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