Overview
The ABB TU835V1, also cataloged as the TU835V1 Extended Module Termination Unit, operates as a dedicated hardware component for signal termination and ModuleBus distribution within the ABB S800 I/O system.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | TU835V1 |
| Brand | ABB |
| Origin | Sweden |
| Product Type | Extended Module Termination Unit |
| Article Number | 3BSE013236R1 |
| I/O System | ABB S800 I/O |
| Connection Type | Terminal block |
| I/O Channels | 8 channels |
| Compatible I/O Modules | AI810, AI815, AI845 |
| Rated Voltage | 50 V |
| Maximum Current per I/O Channel | 2 A |
| Maximum Process Connection Current | 8 A |
| Process Connections | 16 signal terminals, 4 process power terminals, 4 process power 0 V terminals |
| I/O Configuration | Single I/O configuration |
| ModuleBus Distribution | Supports connection to I/O module and next MTU |
| Address Generation | Shifts outgoing position signals to next MTU |
| Mounting Type | Standard DIN rail mounting |
| Mounting Direction | Both directions |
| Mechanical Configuration | Two six-position mechanical keys, 36 configurations |
| Wire Size | Solid: 0.2 – 4 mm²; Stranded: 0.2 – 2.5 mm², 24 – 12 AWG |
| Recommended Torque | 0.5 – 0.6 Nm |
| Stripping Length | 7 mm |
| Dielectric Test Voltage | 500 V AC |
| Weight | 0.26 kg |
| Dimensions | 126 mm width x 64 mm depth x 110 mm height |
| Operating Temp | 0 to +55 deg C |
| Storage Temp | -40 to +70 deg C |
| Max Ambient Temperature | 55 deg C |
| Power Consumption | Not specified |
| Protection Class | IP20 according to IEC 60529 |
| Humidity Range | 5 to 95 %, non-condensing |
| Pollution Degree | Degree 2, IEC 60664-1 |
| Corrosion Protection | ISA-S71.04 G3 |
| EMC Compliance | EN 61000-6-4, EN 61000-6-2 |
| Electrical Safety | EN 61010-1, UL 61010-1, EN 61010-2-201, UL 61010-2-201 |
| Hazardous Location Certification | C1 Div 2 cULus, C1 Zone 2 cULus, ATEX Zone 2 |
| Marine Certification | ABS, BV, DNV-GL, LR |
| CE Mark | Yes |
| RoHS Compliance | EN 50581:2012 |
| WEEE Compliance | Directive 2012/19/EU |
Backplane Bus Communication and I/O Density Scaling
The ABB TU835V1 manages ModuleBus distribution between the connected S800 I/O module and downstream MTU units. In addition, it generates module addressing by shifting outgoing position signals through the termination chain.
The unit supports up to 8 I/O channels with a maximum rated voltage of 50 V and a maximum channel current of 2 A. Furthermore, the terminal arrangement provides separated process power connections for field device wiring.
The TU835V1 uses mechanical coding keys to match different I/O module configurations. Each key provides six selectable positions, resulting in 36 possible mechanical configurations. This coding process only defines physical compatibility and does not modify electrical functionality.
Frequently Asked Questions
Q: Does the ABB TU835V1 support redundant I/O configurations?
A: No. The TU835V1 is designed for single I/O configuration operation and supports compatible single-channel S800 I/O modules.
Q: How does the TU835V1 generate I/O module addressing?
A: The MTU shifts outgoing position signals to the next MTU, allowing the system to generate the correct address position for connected I/O modules.
Q: Can the TU835V1 be installed on a DIN rail?
A: Yes. The unit mounts on a standard DIN rail and uses a mechanical latch mechanism. The latch can be released with a screwdriver.
Field Installation Guidelines
Install the ABB TU835V1 on a correctly grounded DIN rail according to the S800 I/O system installation requirements.
Verify that the mechanical keys match the selected I/O module before mounting the unit. The key positions provide physical identification only and do not configure software parameters.
Terminate field wiring according to the specified wire size range. Maintain proper separation between signal wiring and high-voltage conductors to reduce electrical interference.
Connect protective earth according to the system grounding design. Check terminal torque values during commissioning to maintain stable electrical contact.
Inspect ModuleBus connections between adjacent MTUs before system startup. Confirm correct module addressing after completing the physical installation sequence.
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