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Description
The TU837/TU837V1 is an 8-channel, 250V Extended Module Termination Unit (MTU) designed for the ABB S800 I/O system. It is a passive unit that connects field wiring to I/O modules and integrates with the ModuleBus for data and signal distribution. The MTU distributes the ModuleBus to the I/O modules and subsequent MTUs, while also generating the correct address for each I/O module.
The unit can handle up to 8 I/O channels, with a maximum rated voltage of 250V and a current of 3A per channel. Additionally, the MTU is equipped with a mechanical locking mechanism and a mechanical keying system for proper module configuration. The process signal terminals are divided into two isolated groups, with each group containing fused load terminals and signal return connections.
The TU837 can be mounted on a standard DIN rail with the included mechanical latch that secures the MTU in place. This latch can be released using a screwdriver for easy module replacement or maintenance.
Features
- 250 Volt Applications: Designed for use with DO820 and DO821 I/O modules.
- 8 I/O Channels: Provides up to 8 isolated channels for field signals.
- Fused Load Power Terminals: Each channel includes a fused load outlet terminal and a signal return terminal.
- Dual Power Common Terminals: Includes 2 x 6 power common terminals for process power connections.
- Mechanical Keying: Prevents incorrect I/O module insertion with 36 different configuration options.
- Process Signal Isolation: Two groups of isolated I/O channels for signal return.
- Mechanical Locking Mechanism: Secures the I/O module in place and maintains its initialization state until locked.
Technical Data
| Item | Value |
|---|---|
| Process Connections | 28 (up to 8 I/O channels, 2 terminals per channel) |
| Power Common Terminals | 2 x 6 terminals for process power |
| Maximum Current per I/O Channel | 3 A |
| Maximum Current for Process Connection | 10 A |
| Wire Sizes (Signal Connections) | Solid: 0.2 – 6mm², Stranded: 0.2 – 4mm² (24 – 10 AWG) |
| Wire Sizes (Return Connections) | Solid: 0.2 – 4mm², Stranded: 0.2 – 2.5mm² (24 – 12 AWG) |
| Recommended Torque | 0.5 – 0.6 Nm |
| Stripping Length (Signal) | 8 mm |
| Stripping Length (Return) | 7 mm |
| Dielectric Test Voltage | 2000 V a.c. |
| Mechanical Keys | 36 different combinations |
| I/O Module Lock | Yes, locks module in place |
| Protection Rating | IP20 (IEC 60529) |
| Rated Insulation Voltage | 250 V |
| Dielectric Test Voltage | 2000 V a.c. |
| Width | 126 mm (5”) including connector, 120.5 mm (4.74”) edge to edge installed |
| Depth | 64 mm (2.52”) including terminals |
| Height | 110 mm (4.3”) |
| Weight | 0.26 kg (0.57 lbs) |
Environmental and Certification Data
- CE Mark: Yes
- Electrical Safety: EN 61010-1, UL 61010-1, EN 61010-2-201, UL 61010-2-201
- Marine Certification: ABS, BV, DNV-GL, LR
- Operating Temperature: 0 to +55 °C (+32 to +131 °F), approvals issued for +5 to +55 °C
- Storage Temperature: -40 to +70 °C (-40 to +158 °F)
- Pollution Degree: Degree 2 (IEC 60664-1)
- Corrosion Protection: ISA-S71.04: G3
- Relative Humidity: 5 to 95%, non-condensing
- Protection Class: IP20 (IEC 60529)
- EMC Compliance: EN 61000-6-4, EN 61000-6-2
- Overvoltage Categories: IEC/EN 60664-1, EN 50178
- Equipment Class: Class I (earth protected)
- RoHS Compliance: EN 50581:2012
- WEEE Compliance: DIRECTIVE/2012/19/EU
Mounting and Installation
- Mounting: Compatible with standard DIN rails (both horizontal and vertical installations are supported).
- Mechanical Locking: The MTU includes a mechanical latch that locks it securely to the DIN rail, ensuring grounding and stability.
About Us
Meloauto – Your Trusted Supplier for Original, Brand-New PLC and DCS Parts Meloauto offer a vast selection of products from globally recognized brands, including Allen Bradley, Bently Nevada, Honeywell, ABB, GE Fanuc, Siemens, Invensys Triconex, ICS Triplex, Foxboro, Yokogawa, Schneider, and Hima, among others. With tens of thousands of new parts ready to ship, Meloauto has successfully served customers across over 50 countries worldwide. We focus on supplying discontinued and hard-to-find items, ensuring each product is in brand-new, original condition.Contact Us
- Phone: +86-15915488782
- Email: [email protected]
- WhatsApp: +8615915488782
- Business Hours: 24/7 service
- Address: Unit 601, Powerlong International Center, No. 1599 Luling Road, Siming District, Xiamen City, Fujian, China
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