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Figure 1-13. Remote Sensor Mounting Method . . . . . . . . . . . . . . . . 1-10

Figure 1-14. Two-Wire Harness Assembly . . . . . . . . . . . . . . . . . . . . 1-11

Figure 1-15. Three-Wire Harness Assembly . . . . . . . . . . . . . . . . . . . 1-11

Figure 1-16. Bottom Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Wiring for all Models (except digital output models) . . . . . . . . . . . . . . . . 1-12

For Frequency Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

For Multiplex Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

For Milliamp Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Table 1-1. Cable Length and Wire Size,

Toxic Gas or Oxygen Sensor, Frequency Signal Output . . . 1-13

Table 1-2. Cable Length and Wire Size,

Combustible Gas Sensor, Frequency Signal Output . . . . . 1-13

Table 1-3. Cable Length and Wire Size,IR Combustible Sensor . . . . 1-13

" WARNING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Table 1-4. Cable Length and Wire Size (Toxic Gas or Oxygen) Sensor,

4-20 mA Signal Output (Two Wire Sensor) . . . . . . . . . . . . . 1-14

Table 1-5. Cable Length and Wire Size Combustible Gas Sensor,

4-20 mA Signal Output (Three Wire Sensor) . . . . . . . . . . . 1-14

Typical Wiring of the Ultima Gas Monitor . . . . . . . . . . . . . . . . . . . . . . . . 1-15

Table 1-6. Cable Length and Wire Size (Power Supply 24 VDC) (Toxic

Gas or Oxygen) Sensor, 4-20 mA Signal Output (Three Wire

Sensor) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

Table 1-7. Cable Length and Wire Size IR Combustible Gas Sensor,

4-20 mA Signal Output (Three Wire Sensor) . . . . . . . . . . . 1-15

Figure 1-17. Two-Wire Monitor Operation . . . . . . . . . . . . . . . . . . . . . 1-15

Electrical Connections for the Ultima Remote Sensor Module . . . . . . . . 1-16

"!WARNING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

Figure 1-18. Three-Wire 4 to 20 mA Monitor Operation . . . . . . . . . . 1-16

Figure 1-19. Three-Wire Frequency or MUX Monitor Operation . . . . 1-16

"!CAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

For Catalytic Type Combustible Models . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

Table 1-8. Wire Gauge Vs. Distance . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

Table 1-9. Remote Sensor Wiring Cable . . . . . . . . . . . . . . . . . . . . . . 1-18

Figure 1-20. Combustible Catalytic Ultima Gas Monitor . . . . . . . . . . 1-18

"! WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

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MSA Ultima User Manual

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