ABB TU836/TU836V1 Compact MTU (3BSE013237R1)

Description

The TU836/TU836V1 is an 8-channel, 250V Extended Module Termination Unit (MTU) designed for the ABB S800 I/O system. This passive unit connects the field wiring to the I/O modules and includes part of the ModuleBus. The TU836 can support up to 8 I/O channels, with a maximum rated voltage of 250V and a maximum current of 3A per channel.

The MTU distributes the ModuleBus to the I/O module and the next MTU while also generating the correct address for the I/O module by shifting outgoing position signals.

The unit mounts easily on a standard DIN rail and includes a mechanical latch to lock the MTU in place. The latch can be released with a screwdriver. The MTU uses mechanical keys to configure the unit for different types of I/O modules, with 36 possible configurations.

The process signal terminals are divided into two groups, with each group containing 4 I/O connections and a process voltage connection. Each channel features a fused load outlet terminal and a signal return connection.

Features

250 Volt Applications: Compatible with DO820 and DO821 I/O modules.
Dual Group Design: The process signal connections are divided into two equal, individually isolated groups.
Fused Load Power Terminals: Each channel features a fused load power terminal and signal return.
Process Voltage Distribution: The unit provides process voltage connections in two isolated groups.
ModuleBus Connections: Distributes signals and power between I/O modules.
Mechanical Keying: Prevents incorrect I/O module insertion.
DIN Rail Mounting: Latches securely to the DIN rail for grounding and stability.

Technical Data

Item	Value
Process Connections	16 (up to 8 I/O channels, 2 terminals per channel)
Process Power Connections	4 (including 0V connections)
Maximum Current per Process Voltage	10 A
Maximum Current per I/O Channel	3 A
ModuleBus Distribution (5V)	1.5 A
ModuleBus Distribution (24V)	1.5 A
Fuse Rating	3.15 A (fast glass tube, 5×20 mm)
Wire Sizes	Solid: 0.2 – 4mm², Stranded: 0.2 – 2.5mm² (24 – 12 AWG)
Recommended Torque	0.5 – 0.6 Nm
Stripping Length	7 mm
Mechanical Keys	36 different combinations
I/O Module Lock	Yes, locks module in place
Equipment Class	Class I (earth protected)
Protection Rating	IP20 (IEC 60529)
Rated Insulation Voltage	250 V
Dielectric Test Voltage	2000 V a.c.
Dimensions	Width: 126 mm, Depth: 64 mm, Height: 110 mm
Weight	0.26 kg

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 Standards: 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

Mounting and Installation

Mounting: Mounts on DIN rail (both horizontal and vertical installations are supported).
Mechanical Locking: The unit includes a latch that locks it in place on the DIN rail for secure grounding.

The TU836/TU836V1 is a robust solution for connecting I/O modules in industrial automation systems, particularly for high-voltage applications where isolated channels and proper voltage distribution are necessary. Its mechanical keying and lock-in mechanism provide security and flexibility in field installations.