Twin Input/Output Unit with Isolator, SA4700-104IMC

The Context Plus Twin Input/Output Unit provides the functions of two input/output units within one enclosure for addressable fire alarm systems.

The catalogue states that both input/output circuits are electrically independent. Each circuit can supervise one or more normally open volt-free contacts connected to a single pair of cables and provides a set of changeover relay output contacts.

The unit is designed for indoor use only. It can be surface mounted using the supplied back box or flush mounted using a UK double-gang back box with a minimum depth of 30mm.

Key Features:

• Provides two input/output functions in one enclosure.
• Both input/output circuits are electrically independent.
• Supervises normally open volt-free contacts.
• Changeover relay output contacts.
• Built-in short-circuit isolator.
• Suitable for surface or flush mounting.
• Designed for indoor use only.
• Failsafe mode selectable by DIL switch.
• LED indication for relay, polling, isolator and input status.

Technical Specifications:

• Product number: SA4700-104IMC.
• Operating voltage: 17 to 35V DC.
• Protocol voltage pulses: 5 to 13V.
• Power-up surge current: 900µA.
• Quiescent current: 500µA.
• Maximum current with LEDs illuminated: 3.5mA.
• Maximum cable resistance: 50Ω.
• Relay output contact rating at 30V AC or DC: 1A.
• Maximum continuous current: 1A.
• Maximum switching current: 3A.
• Operating temperature: -40°C to +70°C.
• Humidity: 0 to 95% RH, non-condensing.
• Protection rating: IP54.
• Surface-mounted dimensions: 60 × 150 × 90mm.
• Weight: 244g.
• Catalogue warranty: 10 years.