Bộ DIMMER Helvar - HES92020 2 × 10 A Thyristor Dimmer

HES92020 Thyristor Dimmer

The Imagine HES92020 rack mounted dimmer contains two identical leading edge thyristor dimmers within a moulded case and is designed as an exchangeable module for fitting into ESR dimmer cabinets. The dimmer is for use with incandescent lamps and low voltage lamps via wire-wound transformers. It is suitable for use with electronic transformers, if transformer

manufacturer approves use. With convection cooling the maximum load is 10 A per channel and increases to 20 A per channel when fan cooled.


The dimmer is provided with a three-digit LED display, normally indicating the current output level and four push buttons for manual operation and address setting.

Key Features

Full dimmer status feedback via SDIM control bus permitting full system monitoring. Current and temperature monitoring with automatic load reduction in critical states and shut-off under extreme conditions. Override input for a switching contact to allow the channels to be set to

a pre-programmed level inconjunction with lighting router only. Installation Notes

The dimmer module is specifically designed to be fitted into the ESR dimmer rack stacker unit.

Analogue control connections (if any) are via a connector on the right hand side of the module. Power connections are made using terminal screws under the terminal cover on the left-hand side of the front of the dimmer. All other connections are made at the rear of the dimmer unit

via a plug-in connector.


Power Connection Table

Dimmer module Distribution Panel

Terminal N.

Terminal LA.

Terminal LB.

Terminal CHA.

Terminal CHB.



Ch 1 live feed from MCB.

Ch 2 live feed from MCB.

Ch 1 Relay output terminal

Ch 2 Relay output terminal



Technical Data

Electrical Input

Mains: 180 - 260 V AC, 45 - 65 Hz (90 - 130 V AC to order)

Power Consumption: 3 W at zero output

35 W both dimmers loaded to 10 A

100 W both dimmers loaded to 20 A

Electrical Output

Maximum Output: Input voltage less 2.5 V at input frequency

Maximum Current: 10 A Each dimmer, convection cooled

20 A Paired dimmers, convection cooled

20 A Each dimmer, forced ventilation

40 A Paired dimmers, forceventilation


Control Inputs/Outputs

Digital: RS485 S-DIM protocol (Level and fade time)

Analogue: 0…+10 V (Level)

Operating Conditions

Ambient Temperature: 0…+40º C

Auto Cutback: 70º C internal temperature

Auto Shutdown: 90º C internal temperature

Relative Humidity: 90% max, non-condensing

Storage Temperature: -10°C…+70°C

Mechanical Data

Case: ABS polycarbonate blend two-part moulding,

130°C Vicat UL94-V0 (Halogen Free)

Conformity & Standards

Emission: EN 50 081

Immunity: EN 50 082

RFI: EN 55 014


Safety: EN 60 950

IP Rating: 30

Isolation: 4 kV

IP Rating: 30

Isolation: 4 kV

Net weigh t: 1.5 kg

Shipping weight: 1.6 kg

UL File No: EN191962

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