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6.5 Alarm Configuration <br />The Model 20X/20OX allows the user to select the alarm/output configuration using jumpers <br />table E <br />Please refer to <br />In addition, the TB2 contacts need to be properly selected to ensure that the Model 2102 receives the correct <br />alarm signal from the Model 20X/20OX. (See Table 6.3) <br />6.6 Explosion Proof Installation <br />Where area classification requires explosion proof (NEMA -7) installation, a sealing fitting will be required <br />immediately above the gas sensor module enclosure. <br />20X/20OX Gas Sensor Module (08/04) Page: 10 <br />