Specifications

Introduction
2
Introduction
Secutron’s MR-2320 Series Pre-Action/Deluge and Agent Release Control Panel performs the function of fire
suppression in a wide variety of applications. It is capable of being used in an agent release sprinkler system or in a
pre-action or deluge sprinkler system. It can be used in single-hazard or dual-hazard applications with or without
cross-zoning. The panel includes common alarm, supervisory, and trouble relays, and provides regulated and
unregulated auxiliary power along with four-wire smoke power. It supports auxiliary relays and a city tie module. The
auxiliary relays are based on a hazard area status. The MR-2320 has six input zones and four output zones,
allowing for flexibility in most single- and dual-hazard applications for both deluge and agent releasing applications.
Panel Type
The panel can function as an agent release panel or as a pre-action/deluge panel, depending on which of the
available fixed configurations are chosen from the main programming menu.
Deluge sprinkler system
In deluge sprinkler system open-valve sprinkler heads terminate to a water supply that is controlled by a single
valve. When the system detects fire, it automatically opens the valve via a releasing circuit, allowing the water to
flow through all the sprinkler heads. Deluge sprinkler systems are useful for applications in which simultaneous
discharge of water through every sprinkler is required.
Pre-action sprinkler system
In a pre-action sprinkler system close-valve sprinkler heads are connected to pipes that are supervised for air
pressure. The pipes terminate directly to a water supply. Pre-action systems are useful for applications in which the
prevention of an accidental discharge of water is required.
Agent release system
In an agent release system, an extinguishing agent (such as Argon, dry chemical, CO
2
, Halon, etc.) is automatically
released upon fire detection. An abort function is added to prevent the false release of the extinguishing agent.
Overall Features
• Basic unit has six Class B (Style B) initiating circuits, which may be configured as Class A (Style D) using input
Class A converter adder modules. Each initiating circuit is pre-configured as Alarm, Supervisory (Latching or
non-latching), water-flow, Manual Release Switch, Abort Switch or Manual Release/Abort combination,
depending upon the selected pre-programmed configuration. There are two LEDs per circuit, one for Trouble
(amber), and one dual color (amber/red) LED for Supervisory (amber) and Alarm (red).
• Basic unit has 4 power limited class B (style Y) output circuits. Output circuits 1 & 2 are indicating circuits while
output circuits 3 & 4 are releasing circuits (circuit 4 can work as an indicating circuit in some situations; check
the Pre-Programming Modes section on page for details). Each indicating circuit process type is pre-configured
and can be silenceable. The signal rates depend on the selected pre-programmed configuration.
• A pushbutton associated with each initiating, indicating and releasing circuit can individually bypass the circuit.
• Configurable Signal Silence Inhibit and Auto Signal Silence Timers.
• Subsequent Alarm, Supervisory, and Trouble operation.
• Four wire reset-able smoke power supply: 22.3V DC regulated, 300mA maximum.
• Relay Contacts for Common Alarm, Common Supervisory, Common Trouble, and Auxiliary Alarm Relay
(disconnectable).
• RS-485 Interface for MR-2300 Series Remote Multiplex Annunciators and Smart relay Module.
• Optional Modules for additional Relay Circuits, City Tie and Polarity Reversal Signaling.
• Extensive transient protection.
• Easy configuration of the panel using LCD service tool (CFG-300).
• Releasing circuit protection from false alarm by disconnecting the battery if the voltage falls below 19V.