Overview
The Greengate LiteKeeper 4 (LK4-277NO) is a premium, all-inclusive stand-alone lighting control panel engineered for applications that would traditionally require a timeclock combined with contactors. Designed for electricians and lighting control professionals, the LiteKeeper 4 delivers more standard features than any other stand-alone panel on the market — providing a complete, state-of-the-art lighting control system in a single NEMA 1 enclosure.
Each panel provides independent control of up to four 20A circuits via a simple onboard keypad and 2-line LCD display. Programmable time schedules with an astronomic clock, prioritization and masking of switch inputs, timed inputs, occupant warn-off and overrides, and an RS-232 port are all included as standard features.
Features
- Manual and programmable control of each relay via onboard keypad and 2-line LCD display
- 4 x 20A normally open relays rated for 120/277V AC operation
- Relays built directly onto the control board for reliability
- Time schedules with astronomic clock programming
- Prioritization and masking of switch inputs, time schedules, and remotes
- Timed inputs, occupant warn-off, and manual override (ON/AUTO/OFF master override)
- 4 low voltage input connections
- RS-232 port standard for optional PC software integration
- NEMA 1 surface mount lockable enclosure
- UL 916 Listed
- Optional Buy American Act (BAA) compliant configurations available
- Five-year standard warranty
Specifications
| Manufacturer | Greengate (Cooper Lighting) |
|---|---|
| Model Number | LK4-277NO |
| Series | LiteKeeper |
| Product Type | Lighting Control Panel |
| Voltage | 120/277V AC |
| Relay Rating | 20A, 120/277V AC |
| Power Consumption | 20W (fully loaded) |
| Number of Channels | 4 |
| Relay Type | Normally Open |
| Max Wire Size | 10 AWG |
| Mechanical Operations | 10 million |
| Enclosure Type | NEMA 1, Surface Mount, Lockable |
| Dimensions (H x W x D) | 9.5 in. x 14 in. x 3.25 in. (241 mm x 355 mm x 83 mm) |
| Operating Temperature | 32°F to 122°F (0°C to 50°C) |
| Programming Interface | Onboard keypad and LCD display; optional PC software |
| Communication Port | RS-232 (standard) |
| Standards | UL Approved; UL 916 Listed |
| Installation | NEC compliant installation required |
| Country of Origin | United States |
| UOM | Each (EA) |




