Apollo SIL Input/Output Unit (55000-847SIL)

The Apollo SIL Input/Output Unit (55000-847SIL) provides a reliable interface between an addressable fire alarm system and external equipment. The unit combines a voltage-free double-pole changeover (DPCO) relay output, a single monitored switch input, and an unmonitored non-polarised opto-coupled input, making it fitting for a wide range of monitoring and control applications.

The 55000-847SIL allows the fire alarm system to monitor external devices and control connected equipment through its relay output. Its built-in short-circuit isolator helps maintain loop operation by curbing the effect of wiring faults, making overall system reliability better.

The unit draws power directly from the addressable loop, eliminating the need for a separate power supply and making installation easier. Three visible LEDs provide clear local indication of the unit’s operating status, helping engineers and maintenance personnel quickly identify system conditions.

Key Features

• Addressable input / output unit
• Voltage-free double-pole changeover (DPCO) relay output
• Single monitored switch input
• Unmonitored, non-polarised opto-coupled input
• Three visible status LEDs
• Loop powered
• Built-in short-circuit isolator
• Capable of going up to 30V at 1A
• Reliable monitoring and control working order
• Suitable for fire system integration applications

Typical Applications

The Apollo 55000-847SIL is fitting for a variety of fire alarm monitoring and control functions, including:

• Fire door control
• Smoke control systems
• HVAC shut down
• Building management systems
• Plant equipment monitoring
• Alarm connection
• Remote equipment control
• Industrial safety systems