Description

Product Core Brief

Model: TB820V2
Brand: ABB
Order Code: 3BSE013208R1
Series: S800 I/O, compatible with AC800M / 800xA DCS
Core Function: Convert electrical Modulebus signals to fiber optic links for distributed I/O clusters
Type: Modulebus Cluster Modem (Communication Module)
Key Specs: Dual fiber optic ports; Support max 7 optical clusters; DIN rail mounting; Built-in cluster address rotary switch

Condition: New Surplus, non-refurbished

⚠️ ABB maintains production; spare inventory for legacy DCS projects is readily available

Product Introduction

Long-distance wiring and heavy electromagnetic interference often limit the layout of S800 I/O stations. TB820V2 solves this constraint by bridging electrical Modulebus and fiber optic Modulebus.

It connects local S800 I/O modules on its electrical backplane while exchanging data over multimode fiber. One module supports up to 12 local I/O cards, and the optical network accommodates a maximum of seven independent I/O clusters. The rotary selector switch sets unique cluster ID (1–7) directly on the front panel. This modem is widely deployed in power plants, chemical facilities and pulp & paper sites to separate control cabinets across large plant areas. Many maintenance teams hold spare units to avoid extended downtime on distributed I/O networks.

Key Technical Specifications

Parameter	Specification
Model	TB820V2
Part Number	3BSE013208R1
Application Platform	S800 I/O, AC800M Controller, 800xA System
Communication Bus	Modulebus (electrical + optical)
Fiber Ports	2 optical ports (Tx / Rx), multimode fiber
Max Local I/O Modules	12 units on electrical Modulebus
Maximum Optical Clusters	7 clusters in one optical loop
Cluster Address Setting	Rotary switch, range 1 ~ 7
Power Supply	24 V DC, typical consumption 100 mA
Mounting Method	Standard DIN rail (35 mm)
Operating Temperature	-20 ℃ ~ +60 ℃
Storage Temperature	-40 ℃ ~ +85 ℃
Dimension	170 mm × 58 mm × 122 mm
Weight	0.34 kg
Redundancy Support	Non-redundant version
Included Accessories	Power connector + TB807 Modulebus terminator

ABB TB820V2 3BSE013208R1

Installation & Configuration Guide

Phase 1: Pre-Installation (Estimated 18 min)

⚠️ Safety Reminders

Complete lockout-tagout procedures and cut off all control power
Confirm fiber cable minimum bending radius, avoid sharp folds
Strict ESD protection required during module handling
Prepare terminator TB807 for the end of electrical Modulebus

Required Tools

ESD wrist strap and anti-static mat
PH1 cross screwdriver
Digital multimeter
Mobile phone for recording existing rotary switch setting and fiber wiring

Preparation tasks

Record original cluster address before removing old unit
Photograph fiber Tx/Rx wiring sequence to avoid reversal
Confirm fiber cable type matches multimode transceiver inside TB820V2

Phase 2: Old Module Removal (Estimated 14 min)

Switch off 24 V DC auxiliary power feeding the modem
Carefully unplug fiber optic jumpers; do not touch fiber end faces
Disconnect the 24V power terminal connector
Release DIN rail locking latch and slide the unit outward
Inspect DIN rail and cabinet mounting space for dust and corrosion

⚠️ Warning: Swapped Tx and Rx fiber ports will cause total communication loss. Contaminated fiber tips trigger unstable link alarms.

Phase 3: New Module Installation (Estimated 20 min)

Wear anti-static equipment before unpacking TB820V2
Adjust front rotary switch to match the original cluster address
Clip the modem onto DIN rail and lock the latch
Reconnect 24 V DC power cable, observe polarity strictly
Install TB807 terminator at the last slot of electrical Modulebus
Plug fiber cables according to recorded Tx/Rx mapping

Pre-power-on checklist

[ ] Cluster address matches project configuration

[ ] TB807 terminator installed at Modulebus end

[ ] No fiber overbending

[ ] Power wiring polarity correct

[ ] DIN rail lock fully engaged

Phase 4: Power-On & Commissioning (Estimated 32 min)

Switch on auxiliary power; check front panel LED indicators
Verify optical link status, clear fiber communication alarms
Connect Control Builder M software to scan all S800 I/O modules on this cluster
Confirm all I/O channels are detected without module fault codes
Run signal test for analog and digital I/O points
Maintain continuous monitoring for over 30 minutes with no intermittent alarms

Common troubleshooting tips

Optical link failure: Clean fiber end faces, check Tx/Rx crossover, verify fiber length limits
Cannot detect I/O modules: Missing TB807 terminator or broken electrical Modulebus backplane
Random communication dropouts: Exceed maximum quantity of 7 optical clusters
ABB TB820V2 3BSE013208R1

Frequently Asked Questions (FAQ)

Can TB820V2 support hot swapping while the system remains energized?

Hot swap is not supported. Removing the modem disconnects all I/O signals on this cluster and triggers process alarms. All replacement must be arranged during planned shutdown.
Is TB820V2 interchangeable with TB820?

TB820V2 is the updated hardware revision. Physical installation is compatible, but verify system firmware version before direct replacement. Some older AC800M firmware releases require upgrade.
Can I use single-mode fiber for TB820V2 communication?

The built-in transceivers only support multimode fiber. Single-mode cables cannot establish valid optical links.
How many TB820V2 modems can be deployed within one optical Modulebus loop?

Maximum limit is 7 clusters. Setting more than 7 addresses will lead to bus conflict and partial I/O offline.
Does this module support redundant optical communication paths?

TB820V2 is non-redundant modem. For redundant fiber networks, select alternative hardware solutions and adjust system architecture.
What happens if two modems use the same cluster address?

Address conflict makes both clusters invisible to the controller. The system cannot identify associated I/O modules. Always confirm unique rotary switch settings.
Warranty terms for stocked TB820V2 units?

We provide 12-month warranty under standard industrial operating conditions. Damage caused by reversed power polarity, fiber physical damage, ESD shock or incorrect wiring voids warranty coverage.