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Display and alarm controller

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THE GDS Corp. C2 Protector Two Channel Display / Alarm Controller available from Accurate Detection Pty Ltd is designed to provide simultaneous display and alarm functions for two monitored gas variables.

A large graphic LCD displays input data as bar graphs, 30 minute trend and engineering units. Three adjustable alarm levels are provided per channel.

Relay outputs with voting logic menus allow control of beacons, horns and other alarm events.

Versatile input signal conditioning options allow catalytic bead combustible or electrochemical toxic or oxygen sensors to attach directly to the C2 or be remote mounted using the GDS-48 Universal Remote Sensor assembly.

Both channels can be configured to accept 4-20mA inputs from sensor transmitters such as the GDS-49 Sensor Transmitter or GDS-IR Point Infrared Gas Detector. Seven watts of 24 VDC power is available for auxiliary devices or transmitters.

Measurement ranges in engineering units, adjustable alarm setpoints, optional serial interfaces, and many other features offer flexibility to meet the most demanding applications.

One popular application for the C2 is as a dual gas detector equipped with one local combustible sensor and one local toxic sensor. Alternatively, two combustible locations may be monitored with one sensor local and another remote.

An optional RS-485 MODBUS slave port allows up to 128 C2s to be multi-dropped onto a single data highway for interrogation by a MODBUS master.

Additional C2 options include 5A SPDT discrete relays, 4-20mA outputs, light stacks and audible annunciators. Nonvolatile memory retains all configuration data indefinitely.

Features include:

• CSA certification to C22.2 No 152 for combustible gas detection and approved for Class 1, Div 2 Groups A, B, C, D

• Accepts inputs from one or two local or remote-mount Toxic / O2 / LEL sensors

• Large graphic display and flashing LEDs show values, bargraph and trend data

• Cal Mode offers pushbutton zero & span calibration for direct sensor inputs

• Touch and magnetic keys for non-intrusive calibration in hazardous area

Applications include petrochemical refining, transport and storage, manufacturing of flammable or toxic materials, power generation facilities, spraying, spreading or coating, operations that use flammable solvents, indoor air quality monitoring and building return air plenums.

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