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Description
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
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Relay loads (max.) |
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Resistive: |
10 A |
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Incandescent: |
8 A |
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Inductive: |
5 A |
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Electronic ballasts: |
15 pcs Helvar Type EL–HF/CHF |
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Connections |
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DALI: |
Solid core up to 4 mm²Stranded up to 2.5 mm² |
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DALI cable: |
Removable connector blocksWire section: 0.5 mm² – 1.5 mm² stranded or solid core |
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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. |
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Power |
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Mains supply: |
220 VAC – 240 VAC50 Hz – 60 Hz |
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Mains supply output: |
None |
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DALI consumption: |
2 mA |
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Mechanical data |
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Dimensions: |
88 mm × 58 mm × 90 mm |
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Housing: |
DIN-rail case 88 mm wide |
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Weight: |
300 g |
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Mounting: |
DIN rail (installation in switchgear/controlgear cabinet) |
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IP code: |
IP30 |
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Operating and storage conditions |
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Ambient temperature: |
0 °C to +40 °C |
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Relative humidity: |
Max. 90 %, noncondensing |
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Storage temperature: |
−10 °C to +70 °C |
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Conformity and standards |
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EMC emission: |
EN 55015 |
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EMC immunity: |
EN 61547 |
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Safety: |
EN 61347-2-11 |
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Isolation: |
4 kV |
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Environment: |
Complies with WEEE and RoHS directives. |