Keterangan

ABB TU839 Extended Module Termination Unit

The ABB TU839 3BSE046966R1, also cataloged as the TU839 Extended Module Termination Unit, distributes ModuleBus signals to the installed I/O module and the next MTU while providing eight I/O channels and two isolated sensor-power groups.

Hardware Specifications

Parameter	Specification
Model	TU839
Article Number	3BSE046966R1
Brand	ABB
Product Type	Extended Module Termination Unit
Type	Extended
Connection	Terminal block
Channels	8 I/O channels
I/O Connections	2 connections per channel
Process Connections	28 total; 8 I/O channels plus 2 x 6 process power terminals
Sensor Power Distribution	2 individually isolated groups
Sensor Power Fuse	200 mA per group
Maximum Rated Voltage	250 V
Maximum Current per I/O Channel	1 A
Maximum Current Process Connection	10 A
I/O Compatibility	DI820, DI821, DI825
I/O Configuration	Single I/O
ModuleBus Distribution	To the I/O module and the next MTU
Address Generation	Outgoing position signals shifted to the next MTU
Mounting	Standard DIN rail
Mounting Direction	Both directions
DIN Rail Retention	Mechanical latch
Mechanical Keying	2 keys, 6 positions each
Keying Configurations	36 possible mechanical configurations
Acceptable Wire Size	Stranded: 24-14 AWG; 0.2-2.5 mm2 solid or stranded
Recommended Terminal Torque	0.5 Nm
Dielectric Test Voltage	2300 V AC channel to ground; 1350 V AC channel to channel
Operating Temperature	0 to +55 deg C; approvals issued for +5 to +55 deg C
Storage Temperature	-40 to +70 deg C
Relative Humidity	5 to 95 %, non-condensing
Pollution Degree	Degree 2, IEC 60664-1
Corrosion Protection	ISA-S71.04: G3
Protection Class	IP20 according to IEC 60529
EMC	EN 61000-6-4, EN 61000-6-2
Electrical Safety	EN 61010-1, UL 61010-1, EN 61010-2-201, UL 61010-2-201
Overvoltage Category	IEC/EN 60664-1, EN 50178
Equipment Class	Class I according to IEC 61140
Mechanical Conditions	IEC/EN 61131-2
CE Mark	Yes
RoHS Compliance	EN 50581:2012
WEEE Compliance	DIRECTIVE/2012/19/EU
Width	126 mm including connector; 120.5 mm edge to edge installed
Depth	64 mm including terminals
Height	110 mm
Weight	0.28 kg

ModuleBus Distribution and Mechanical Addressing

The TU839 distributes the ModuleBus from the I/O module to the following MTU. It also generates the I/O module address by shifting the outgoing position signals toward the next MTU.

Two mechanical keys configure the MTU for different I/O module types. Each key provides six selectable positions, resulting in 36 possible mechanical configurations. This keying function provides physical configuration only and does not change the electrical functionality of the MTU or I/O module.

Furthermore, the MTU uses a mechanical DIN rail latch for retention. Installers can mount the unit on a standard DIN rail in either supported direction.

Sensor Power Distribution

The TU839 provides two individually isolated process-voltage groups for sensor power distribution. Each group incorporates a 200 mA fuse.

Each of the eight I/O channels provides two I/O connections. The channel rating permits a maximum current of 1 A, while the maximum process-connection current is specified as 10 A.

The fuse rating should match the actual application load and connected sensor requirements. Do not select the fuse solely from the maximum channel rating.

Frequently Asked Questions (FAQ)

Q: How many I/O channels does the TU839 support?
A: The TU839 supports up to 8 I/O channels, with 2 I/O connections assigned to each channel.

Q: How does the TU839 generate the I/O module address?
A: The MTU shifts the outgoing position signals to the next MTU, thereby generating the corresponding I/O module address.

Q: What is the purpose of the two mechanical keys?
A: The keys provide physical configuration for different I/O module types. Each key has 6 positions, creating 36 possible mechanical configurations without changing MTU functionality.

Field Installation Guidelines

• Mount the TU839 on a compatible standard DIN rail and engage the mechanical latch fully.
• Verify the mechanical key positions before installing the associated I/O module.
• Connect the ModuleBus according to the intended MTU sequence and verify the outgoing connection toward the next MTU.
• Separate process wiring from high-energy switching and power conductors where practical to reduce electrical interference.
• Maintain correct polarity and termination for all connected process circuits.
• Select the sensor-power fuse rating according to the actual application load and circuit requirements.
• Keep the two sensor-power groups electrically separated as specified by the installation design.
• Use acceptable conductor sizes from 24-14 AWG or 0.2-2.5 mm2.
• Apply the specified 0.5 Nm terminal torque when terminating field wiring.
• Verify protective earth and enclosure arrangements according to the applicable installation standard.
• Confirm that the installation remains within the specified 0 to +55 deg C operating range.
• Maintain the IP20 protection requirements of the installed assembly.
• Inspect channel-to-ground and channel-to-channel insulation requirements before energizing the process connections.

Spesifikasi

• Merek: ABB
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Keuntungan

• Keandalan tinggi di lingkungan industri
  
  
• Mendukung operasi berkelanjutan
• Kompatibel dengan sistem PLC/DCS utama