Farfisa 1181E
Farfisa 4+1 Video Power Supply
The Farfisa 1181E is a high-performance video power supply unit engineered specifically for traditional 4+1 video door entry installations. Designed to deliver stable and regulated power, this unit features a built-in electronic note call generator and an integrated automatic timer module that powers the video riser network for approximately 100 seconds per activation. Built with advanced safety mechanisms, the internal circuitry provides comprehensive protection against overloads and short circuits, ensuring system longevity. It efficiently handles simultaneous power distribution to a single external camera entrance panel alongside either two flat video intercom monitors wired in parallel or one standard video monitor. Housed in a durable casing, the unit occupies 8 DIN modules on a standard DIN rail and carries full VDE safety certification.
- Product Code: Farfisa 1181E
- System Type: Video 4+1 installations
- Input/Output Form Factor: 8 A modules on DIN bar rail
- Output Voltages: Dual output 13 Vac and 21 Vdc
- Call Type: Integrated electronic note call
- Timer Duration: Built-in timer mode (approximately 100 seconds)
- Safety Certifications: VDE certified with overload and short-circuit protection
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Core Features and System Compatibility
Dual-Voltage Output Capabilities
The primary advantage of the Farfisa 1181E is its precise dual-rail power distribution system. It supplies a split output of 13 Vac and 21 Vdc concurrently, providing the distinct voltage levels required to run both the mechanical lock releases and the high-draw video processing monitors. This dual capability eliminates the need for separate audio and video transformers within the entry network.
Intelligent Load and Riser Allocation
Engineered to manage diverse system loads, the 1181E safely allocates timed power across multiple hardware configurations. It easily drives a single external video entrance camera unit whilst supplying power to two parallel flat-screen video intercom handsets. Alternatively, it can run a single camera unit alongside a deeper profile, non-flat video monitor without voltage drop.
Built-In System Protection and Timers
To prevent system-wide failures caused by external faults, the 1181E features self-resetting short-circuit and thermal overload protection. The integrated timer circuit automatically shuts down power to the camera riser after 100 seconds of inactivity, reducing standby energy usage and preventing image sensor burnout on the external door panel.
Installation and Maintenance Advice
As access control specialists, we advise installing the 1181E inside a well-ventilated, secure electrical enclosure using standard DIN rails. Ensure the 8 DIN module space allocation is calculated accurately before mounting. Always cross-reference the output terminal strips against your schematic wiring loop to avoid matching the 13 Vac line to the 21 Vdc video bus, as cross-wiring will cause catastrophic damage to connected monitors.
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