Excellent PLC
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Product Overview
The ABB TU844 3BSE021445R1 is a termination unit (MTU) in the S800 I/O series, designed for System 800xA. It provides field connection for up to 8 I/O channels and ensures safe and reliable distribution of process voltage and module communication. This unit supports redundant configurations and DIN rail mounting with robust mechanical locking and keying systems.
Technical Specifications
| Parameter | Value |
|---|---|
| Article Number | 3BSE021445R1 |
| Channels Supported | 8 |
| Maximum Voltage | 50 V |
| Max Current per I/O Channel | 2 A |
| Max Process Connection Current | 5 A |
| Dielectric Strength | 500 V AC |
| Mounting Type | Horizontal, DIN rail |
| Terminal Connection Type | Terminal block |
| Acceptable Wire Size | Solid: 0.2–4 mm², Stranded: 0.2–2.5 mm² |
| Recommended Torque | 0.5–0.6 Nm |
| Operating Temperature | 0 to +55 °C |
| Storage Temperature | -40 to +70 °C |
| Humidity Range | 5% to 95%, non-condensing |
| Pollution Degree | IEC 60664-1 Degree 2 |
| IP Rating | IP20 |
| Certifications | CE, UL, cULus, ATEX Zone 2, Marine certified |
| Dimensions (W x H x D) | 64 x 186.5 x 124 mm |
| Weight | 0.6 kg |
Product Applications
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Industrial automation systems using ABB System 800xA
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Redundant I/O system configurations
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Integration with AI845, AI880, AI880A, DP840 analog and digital modules
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Environments requiring high reliability and signal integrity
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Projects needing field signal termination with process power distribution
Product Advantages
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Supports up to 8 field I/O channels with process power terminals
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Designed for redundant installations with dual ModuleBus connections
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Mechanical keying to avoid incorrect module installation
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Easy DIN rail mounting with secure latch system
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Marine and hazardous area certified
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Compact design for space-constrained cabinets
Frequently Asked Questions (FAQ)
Q1: How many channels does the TU844 support?
A1: It supports 8 I/O channels with 2 terminals per channel.
Q2: What I/O modules is the TU844 compatible with?
A2: It is compatible with AI845, AI880, AI880A, and DP840 modules.
Q3: Can the TU844 be used in hazardous environments?
A3: Yes, it is certified for ATEX Zone 2 and C1 Zone 2 hazardous areas.
Q4: What is the maximum voltage and current per channel?
A4: The unit supports up to 50 V and 2 A per channel.
Q5: What are the mounting options?
A5: The TU844 is designed for DIN rail horizontal mounting.
Q6: Is the TU844 suitable for redundant applications?
A6: Yes, it supports redundant I/O configurations.
Q7: What is the IP protection level of the TU844?
A7: It has an IP20 protection rating.
Q8: What environmental certifications does it carry?
A8: It is CE marked, RoHS compliant, and holds marine certifications such as DNV-GL and ABS.
Q9: What tools are needed for wiring?
A9: Standard wiring tools with 0.5–0.6 Nm torque are recommended.
Q10: Does TU844 support both current and voltage input types?
A10: Yes, it supports both via configurable shunt sticks (TY801).
Related ABB S800 I/O Models
| Model | Description | Channels | Dimensions (mm) | Weight |
|---|---|---|---|---|
| TU845 3BSE021447R1 | MTU for AI/AO modules, 16 ch | 16 | 64 x 186.5 x 124 | 0.6 kg |
| TU846 3BSE022460R1 | Compact MTU for DI/DO | 8 | 64 x 186.5 x 124 | 0.5 kg |
| TU848 3BSE069053R1 | MTU for high density analog modules | 16 | 64 x 186.5 x 124 | 0.6 kg |
| TU849 3BSE042236R2 | Redundant MTU with fuse protection | 16 | 64 x 186.5 x 124 | 0.65 kg |
| TU850 3BSE040783R1 | MTU for pulse or fast DI modules | 8 | 64 x 186.5 x 124 | 0.55 kg |
| TU851 3BSE030220R1 | MTU for special I/O module configurations | 8 | 64 x 186.5 x 124 | 0.55 kg |
Popular ABB Models
| Model | Description | Application Area | Dimensions (mm) | Weight |
|---|---|---|---|---|
| PM864AK01 | AC 800M CPU Module | Control/Automation | 152 x 186 x 50 | 0.8 kg |
| CI854AK01 | PROFIBUS DP Communication Interface | Fieldbus Communication | 64 x 186 x 124 | 0.5 kg |
| AI845 3BSE023675R1 | Analog Input Module | Process Signal Acquisition | 64 x 186.5 x 124 | 0.3 kg |
| AO845 3BSE045584R1 | Analog Output Module | Process Control Output | 64 x 186.5 x 124 | 0.3 kg |
| DI820 3BSE008512R1 | Digital Input Module, 16 ch | Discrete Signal Input | 64 x 186.5 x 124 | 0.4 kg |
| DO820 3BSE008514R1 | Digital Output Module, 16 ch | Discrete Signal Output | 64 x 186.5 x 124 | 0.4 kg |
