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Ll <br />2. Model 200X Series <br />The Model 200X Series consists of <br />three separate gas monitors, Model <br />2001 for Combustibles, Model 2003 for <br />Hydrogen Sulfide and Model 2006 for <br />Carbon Monoxide. A red LED (light - <br />emitting diode) and audible 70 dB alarm <br />activate when the concentration of gas <br />exceeds the factory -set (and user -ad- <br />justable) level. A green LED indicator <br />on the monitor shows that power is con- <br />nected and it is a safe condition. <br />The standard configuration has a buzzer <br />and normally operating open relay. This <br />configuration can be changed by the <br />user. (See table 2.1) <br />The 200X-00 series module includes a <br />AC -to -DC power supply that may be <br />plugged into a standard AC source. The <br />device may also accept 9 - 24 VDC. <br />End user must use a Listed/Certified <br />Class 2 output power source. For in- <br />door applications, where the 200X is <br />used, a Class 2 power supply is pro- <br />vided. <br />3. Semiconductor -Type Sensor <br />0 Instruction Manual <br />3.100 <br />1.125 3.200 <br />,.,zo <br />2,240 ®, ®cas <br />o®o <br />IF <br />®00 ®®O <br />aroU.,"; rioLEs <br />cm �6 <br />Figure 1.2 <br />Outline View - 200X Series <br />A solid-state semiconductor -type sensor and as- <br />sociated electronic circuitry ensure trouble-free, <br />long-term operation. All the electronic circuitry <br />needed to operate the monitor, except the DC <br />input power, is contained in a compact unit. <br />There are no pumps, filters, or chemical cells to <br />replace or maintain. Except for periodic cali- <br />bration to verify the alarm setting, no attention <br />is required after installation. The user may ad- <br />just the alarm level by applying a different cali- <br />bration gas concentration. <br />A sensor self -check feature will flash the alarms <br />on and off alternatively should the sensor fail <br />(open circuit). The alarm flash includes LEDs, <br />audible alarm, relay and alarm signal as appli- <br />cable. On both the 20X and 200X series, the <br />alarm output oscillates to indicate sensor fail- <br />ure. <br />If a remote alarm is desired, Sierra Monitor's <br />Alarm Panel, Model 2102 Dual Channel can be <br />connected up to 500 feet away from the moni- <br />tors. <br />20X/200X Gas Sensor Module (08/04) Page: 2 <br />