MTN646991 - Unité de contrôle KNX SCHNEIDER - Free user manual and instructions

Product Type	KNX Control Unit
Brand	Schneider Electric
Model	MTN646991
Dimensions (H x W x D)	90 mm x 90 mm x 40 mm
Weight	0.2 kg
Power Supply	Bus voltage 24 V DC via KNX bus
Power Consumption	Typical 150 mW
Bus Current Consumption	10 mA max
Number of Outputs	4 (switching actuators)
Output Type	Relay, normally open
Switching Capacity	10 A (250 V AC) per channel
Operating Temperature	-5 °C to 45 °C
Storage Temperature	-20 °C to 70 °C
Protection Rating	IP 20 (indoor use only)
Mounting Type	DIN rail mount (36 mm)
Compliance	CE, KNX certified
Main Functions	Control lighting, blinds, heating, ventilation; scene control, logic functions
Maintenance	Clean with a dry, soft cloth; no liquids
Safety	Installation only by qualified electrician; observe local regulations; disconnect power before servicing
Spare Parts and Repairability	Contact Schneider Electric service; no user serviceable parts

Frequently Asked Questions - MTN646991 SCHNEIDER

What is the Schneider MTN646991?

The MTN646991 is a KNX control unit (actuator) from Schneider Electric, designed for switching electrical loads such as lighting, blinds, or heating systems in building automation.

How is the device powered?

The device is powered via the KNX bus at 24 V DC. It does not require an external power supply for its electronic circuits.

What are the dimensions and mounting requirements?

Dimensions are 90x90x40 mm. It mounts on a DIN rail (36 mm) inside a distribution board. It is intended for indoor use only (IP20).

How many outputs does it have?

It features 4 independent outputs, each a relay rated at 10 A (250 V AC), suitable for switching lights, motors, or other loads.

Can I use it for dimming lights?

No, this model is a switching actuator (ON/OFF) only. For dimming, you need a separate KNX dimmer actuator.

What software is needed for programming?

Programming requires ETS (Engineering Tool Software) from the KNX Association. The device database (VD) file can be downloaded from Schneider's website.

Is it compatible with other KNX devices?

Yes, the MTN646991 is fully KNX compliant and interoperable with any certified KNX product from any manufacturer.

How do I reset the device?

A bus voltage reset (disconnect and reconnect the bus voltage) restarts the device. Some parameters can be reset via ETS. There is no physical reset button.

What maintenance is required?

The device is maintenance-free except for occasional cleaning with a dry cloth. Do not use water or cleaning agents. Keep ventilation slots unobstructed.

Where can I find the user manual?

The user manual is available for free download in PDF format from notice-facile.com or from Schneider Electric's official website. Search for model MTN646991.

USER MANUAL MTN646991 SCHNEIDER

SpaceLogic KNX Control unit 0-10 V REG-K/3-gang with manual mode

Operating instructions

Art. no. MTN646991

For your safety

▲ ▲ DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

Safe electrical installation must be carried out only by skilled professionals. Skilled professionals must prove profound knowledge in the following areas:

• Connecting to installation networks
• Connecting several electrical devices
• Laying electric cables
• Connecting and establishing KNX networks
  • Safety standards, local wiring rules and regulations

Failure to follow these instructions will result in death or serious injury.

CAUTION

The device may be damaged!

• Only operate the device according to the specifications stated in the Technical data.
• All the devices that are installed next to the binary input must be equipped with basic insulation at the very least.

Failure to follow these instruction can result in equipment damage.

Control unit introduction

The control unit 0-10 V REG-K/3-gang with manual mode dims and switches fluorescent lamps using electronic ballasts with a 0-10 V/1-10 V interface and LV halogen lamps using transformers with a 0-10 V/1-10 V interface.

The control voltage range can be set with the ETS via a parameter.

You can also manually switch the connected loads with the manual switches on the control unit without bus voltage.

The control unit has a bus coupler. It is installed on a DIN rail acc. to EN 60715, with the bus connection made via a bus connecting terminal. A data rail is not required.

Connections, displays and operating elements

Ⓐ Bus connecting terminal
© Cable cover
© Programming button
⑭ Programming LED (red)
© Operating LED "RUN" (green)
F Manual switch
⑤ Channel terminals for load voltage
⑧ Outputs 1-10 V

Installing the control unit

① Set the control unit onto the DIN rail.

② Connect KNX.

WARNING

Risk of fatal injury from electrical current. The device could become damaged.

Safety clearance must be guaranteed in accordance with IEC 60664-1. There must be at least 4 mm between the individual cores of the 230 V supply cable and the KNX line.

WARNING

Risk of fatal injury from electrical current. The device could become damaged.

Disconnect the mains voltage before connecting the device to the load.

Terminals may not be inserted under load.

③ Connect the bus voltage.

Ⓐ Control unit
⑧ Electronic ballast with 0-10 V/1-10 V interface
© Fluorescent lamp
⑭ Electronic transformer with 0-10 V/1-10 V control input
© LV halogen lamps
⑤ To other devices with 0-10 V/1-10 V interface

④ Connect the load.

⑤ Connect the load voltage.

Putting the actuator into operation

① Press the programming button.
The programming LED lights up.
② Load the physical address and application into the device from the ETS.

The programming LED goes out.

The operating LED lights up: The application was loaded successfully, the device is ready for operation.

Technical data

Supply from KNX: DC 24 V / approx. 17.5 mA

Insulation

voltages: AC 4 kV bus/mains voltage and

bus/0-10 V

AC 4 kV 0-10 V - mains voltage

Switch contact: Make contact, floating

Connection data for each channel:

Nominal current: 16 A, inductive cos φ = 0.6

Incandescent lamps: AC 230 V, 3600 W

Halogen lamps: AC 230 V, 2500 W

LV halogen lamps: max. 2000 VA via electronic transformers

Fluorescent lamps: AC 230 V, 5000 W,

uncompensated

AC 230 V, max. 2500 VA

parallel-compensated

Capacitive load: AC 230 V, 3600 W, 200 μF

Protection: The switch contact must be protected by a 16 A series-connected circuit-breaker.

Service life: > 50,000 switching cycles at nominal load

0-10V/1-10V

Interface: 0-10 V for dimming electronic ballasts

Loading capacity: max. 100 mA (max. 50 electronic ballasts, depending on EB)

Min. control voltage: 0 V

Ambient temperature

Operation:

-5 °C to +45 °C

Storage:

-25 °C to +55 °C

Transport:

-25 °C to +70 °C

Max. humidity: 93 %, no moisture condensation

Environment: Can be used at up to 2000 m above sea level (MSL)

Operating elements: 1 programming button 1 manual switch per channel

Display elements: 1 red LED: programming check

1 green LED: ready for

operation, "RUN"

Connections

Bus:	via two 1 mm pins for bus connecting terminal

Live conductor and

switch output:

3-gang screw terminals for max. 2.5 mm ^2

1-10 V output: 2-gang pluggable screw terminals for max. 2.5 mm ^4

EC directives: complies with Low-Voltage Directive 73/23/EEC, complies with EMC Directive 89/336/EEC

Device width: 4 modules = approx. 72 mm

Schneider Electric -Contact

Schneider Electric Industries SAS

If you have technical questions, please contact the Cus-

tomer Care Centre in your country.

se.com/contact

UK Representative

Schneider Electric Limited

Stafford Park 5

Telford, TF3 3 BL, UK