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Overview
The TU837/TU837V1 is an 8-channel, 250 V Extended Module Termination Unit (MTU) designed for the S800 I/O system. The MTU acts as a passive unit, facilitating the connection of field wiring to I/O modules. It also manages the distribution of the ModuleBus and generates the correct address for the I/O modules. This ensures reliable communication between the MTU and the connected modules. The TU837/TU837V1 can handle a maximum rated voltage of 250 V and a maximum current of 3 A per channel.
The MTU can be mounted onto a DIN rail for easy installation. It features a mechanical latch for secure attachment to the rail, which can be released using a screwdriver. Mechanical keys provide additional configuration options, allowing for 36 different module types based on the position of the keys.
Each I/O channel is individually isolated, providing enhanced safety for field wiring. The MTU also includes fuse protection for each channel and offers the flexibility to use up to 8 I/O channels.
Key Features & Benefits
- 8 Channels for I/O connections, each with 2 terminals per channel.
- 250 V Maximum Voltage rating with a 3 A Maximum Current per I/O channel.
- Individually isolated process connections for enhanced safety.
- Fuse protection (3.15 A fast glass tube fuses) for reliable operation.
- Mechanical locking mechanism to ensure proper module positioning and initialization.
- Mechanical keys for configuring the MTU to match specific I/O modules.
Technical Specifications
| Feature | Value |
|---|---|
| Process Connections | 28 (up to 8 I/O channels, 2 terminals per channel) |
| Power Common Terminals | 2 x 6 |
| Maximum Current per I/O Channel | 3 A |
| Maximum Current per Process Connection | 10 A |
| ModuleBus Current Distribution | 1.5 A (5 V), 1.5 A (24 V) |
| Fuse Type | 3.15 A (fast glass tube, 5×20 mm) |
| Acceptable Wire Sizes (Signal Connection) | Solid: 0.2 – 6 mm², Stranded: 0.2 – 4 mm² (24 – 10 AWG) |
| Acceptable Wire Sizes (Return Connection) | Solid: 0.2 – 4 mm, Stranded: 0.2 – 2.5 mm² (24 – 12 AWG) |
| Stripping Length (Signal) | 8 mm |
| Stripping Length (Return) | 7 mm |
| Recommended Torque | 0.5 – 0.6 Nm |
| Dielectric Test Voltage | 2000 V a.c. |
| Mechanical Keys | 36 different combinations |
| I/O Module Lock | Locks module in place and enables operation |
Environmental & Certification
- 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
- Temperature Range (Operating): 0 to +55 °C (+32 to +131 °F); Approvals for +5 to +55 °C
- Temperature Range (Storage): -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
- Max Ambient Temperature: 55 °C (131 °F)
- Protection Class: IP20 according to IEC 60529
- EMC Compliance: EN 61000-6-4, EN 61000-6-2
- Overvoltage Categories: IEC/EN 60664-1, EN 50178
- RoHS Compliance: EN 50581:2012
- WEEE Compliance: DIRECTIVE/2012/19/EU
Dimensions
- Width: 126 mm (5 in.) including connector, 120.5 mm (4.74 in.) edge-to-edge installed
- Depth: 64 mm (2.52 in.) including terminals
- Height: 110 mm (4.3 in.)
- Weight: 0.26 kg (0.57 lbs.)
Compatibility
- Use with I/O Modules: Compatible with DO820, DO821 I/O modules
- Mounting: Suitable for mounting in both directions
- Single/Redundant I/O: Single
Contact Us
- Phone: +86-15915488782
- Email: uma@meloauto.com
- 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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