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494 4 × 10 A Relay Unit

4-Channel Relay Unit (494)

The 4-Channel Relay Unit is a DALI-compatible interface unit designed to allow nondimmable loads to be incorporated into a DIGIDIM lighting control system. The relay unit is a DIN-rail mounted unit that can control four individually programmable relays. The relays are ‘normally open’, volt-free and can switch resistive loads of up to 10 A.

The relay unit is provided with a status LED, a physical selection switch and four relay state indicators. The status LED provides status and a fault indication. The physical selection switch is used to identify the device during system configuration and also acts as a manual override. The four relay state indicator LEDs are illuminated when the respective relay is closed.

Note: This unit does not contain a DALI power supply. Therefore, one must be present elsewhere in the system.

Key Features

Four individually programmable relays, normally open and volt-free.
Relays are internally isolated permitting separate phases to be controlled in one unit.
Each relay can be manually controlled using the physical selection switch.
All DALI functions are programmed with either DIGIDIM Toolbox or Designer software.
DIN-rail mounted and only 88 mm wide.

Technical Data

Relay loads (max.)
Resistive:	10 A
Incandescent:	8 A
Inductive:	5 A
Electronic ballasts:	15 pcs Helvar Type EL–HF/CHF
Connections
DALI:	Solid core up to 4 mm²Stranded up to 2.5 mm²
DALI cable:	Removable connector blocksWire section: 0.5 mm² – 1.5 mm² stranded or solid core
Cable rating:	All cables must be mains rated. Note: If equipment is used in an electrically noisy environment, the DALI cable should be screened and connected to the earth.
Power
Mains supply:	220 VAC – 240 VAC50 Hz – 60 Hz
Mains supply output:	None
DALI consumption:	2 mA
Mechanical data
Dimensions:	88 mm × 58 mm × 90 mm
Housing:	DIN-rail case 88 mm wide
Weight:	300 g
Mounting:	DIN rail (installation in switchgear/controlgear cabinet)
IP code:	IP30

Operating and storage 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
Safety:	EN 61347-2-11
Isolation:	4 kV
Environment:	Complies with WEEE and RoHS directives.