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The General Monitors Model TA202A is a singlechannel H2S Trip Amplifier Module that has been designed for use with General Monitors' H2S Intelligent Sensors. It is designed to monitor hydrogen sulfide in parts per million (ppm) levels and provide status indication and alarm outputs. Microprocessor-based electronics allow all options to be user selectable through front panel interface (mode/select switch and digital display). A digital display on the TA202A indicates fault codes and setup options. Other features of the TA202A are LED indications of status, as well as both open collector and relay outputs for fault, low alarm and high alarm. Each module has RS-485 serial communications providing an interface with a General Monitors Model CC02A MODBUS communications module. Fault and alarm status, as well as setup options, can be configured via the CC02A module. The TA202A is part of the Zero Two Series Gas and Fire Detection System which is a flexible solution for various combustible, toxic gas and fire detection applications. All of the Zero Two Series system cards are compatible and can be intermixed within the same rack if required. The Zero Two Series Rack includes options of 4, 8 or 16 channels and provides a bus of common terminals to each channel.