Bộ DIMMER Helvar - 4-Channel Thyristor Dimmer Module (458/DIM4)

4-Channel Thyristor Dimmer Module (458/DIM4)

The 458/DIM4 is a four-channel digital thyristor dimmer module, capable of leading-edge dimming of resistive and inductive loads. It has a DALI and an SDIM/DMX interface, and therefore can be fully integrated into a standalone DALI, a DIGIDIM, an Imagine router or a DMX system. The module has four channels rated at 10 A, with a total current capacity of 40 A.

The front of the module is equipped with an LCD display and keypad to set basic configuration parameters and provide basic control of channel and output levels. The module is easily fitted to a 458Mx chassis, in which each load channel is protected by an individual MCB.

Note: The 458/DIM4 4-Channel Thyristor Dimmer Modules are supplied separately from the 458Mx chassis.

Key Features

  • Easily attached to a 458Mx chassis and connected to the mains supply for quick installation.
  • LCD display screen and a five-button keypad for monitoring, configuration and manual control.
  • Auxiliary power supply can be used to power one TouchPanel.
  • Built-in DIGIDIM power supply, which can be used to power DALI systems if required.

Options Module

There is an internal connection for an options module, which is sold separately. The options module is used to convert four channels into any of the following modes:

  • 1–10 V → sink, 50 ballasts drive
  • DSI® (Digital Signal Interface) → 10 ballasts drive
  • PWM (Pulse Width Modulation) → 10 ballasts drive
  • DALI broadcast → 10 ballasts drive

Technical Data


DALI: 0.5 mm² – 1.5 mm² (max. 300 m @ 1.5 mm²)

SDIM/DMX: 0.22 mm² – 1.5 mm² low-loss

RS485 Type (multistranded, twisted and shielded)

Override (OVR): 0.5 mm² – 1.5 mm² (screened and



Mains supply: 100 VAC – 240 VAC (nominal)

85 VAC – 264 VAC (absolute)

45 Hz – 65 Hz

Power consumption: 1.2 W (excluding loads)


Supply current: 40 A (max.)

Nominal load: 4 × 10 A loads

DALI supply: 250 mA (max.), 16 VDC (nominal)

TouchPanel supply: 250 mA (max.), 16 VDC (nominal)


Power circuit protection: 6 A max. external protection, earth mandatory

Thermal protection: Control board – resettable fuse

Power devices – thermal sensing


Mounting: Attached to 458M1, 458M2, or

458M3 chassis

Mechanical data

Dimensions: 105 mm × 360 mm × 170 mm

Housing: Powder coated steel (black)

Weight: 6.2 kg

Heatsink: Anodised aluminium

IP code: IP20

Operating conditions

Ambient temperature: 0 °C to +40 °C

Relative humidity: Max. 90 %, noncondensing

Storage temperature: –10 °C to +70 °C

Conformity and standards

EMC emission: EN 55015 EMC immunity: EN 61547 Harmonics: EN 61000-3-2*

* Professional equipment.

Total rated power > 1 kW. Safety: EN 60950

DALI data transfer: DALI standard IEC 62386, with Helvar extensions

SDIM data: Helvar protocol (RS485, 115 kbps)

DMX data: DMX: DMX512-A protocol (max. refresh rate: 33 Hz)

Environment: Complies with WEEE and RoHS directives.

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