Oldham MX 52, Commissioning, Operating And Maintenance Manual

Page: 5 / 96

5
CONTENTS
1. DESCRIPTION.............................................................................................. 7
1.1. General ............................................................................................................................. 7
1.2. Rack .................................................................................................................................. 8
1.3. The various printed circuit boards ................................................................................... 8
2. INSTALLATION AND CONNECTIONS .................................................. 9
.1. Installation: recommendations ............................................................................................ 9
.2. Electrical connections of the MX52 Unit (Fig. 8) ................................................................ 9
2.2.1. Alternative power supply ......................................................................................... 9
2.2.2. DC power supply ................................................................................................... 10
.3. Detectors (Figures 9 and 12) ............................................................................................. 10
2.3.1. Explosimetric detectors of PONT type .................................................................. 10
2.3.2. 3-wire detectors 4-20 mA: 3 connecting wires for shielded cable ......................... 11
2.3.3. 2-wire detectors 4-20 mA: 2 connecting wires for shielded cable ......................... 11
2.3.4. FIRE detectors: 2 connecting wires for shielded cable .......................................... 11
2.3.5. FLAME detectors: 2, 3 or 4 connecting wires for shielded cable depending on
utilization ............................................................................................................................... 11
2.3.6.
CO2 detector of type “Ventostat VT” .................................................................... 13
2.3.7. Specific case of intrinsic safety detectors .............................................................. 13
2.3.8. Other detectors with standardized current output .................................................. 14
2.3.9. Parking application ................................................................................................ 14
.4. Connecting the unit to external devices ............................................................................. 15
2.4.1. Slaving controls...................................................................................................... 15
2.4.2. 4-20 mA current outputs (Fig. 12) ......................................................................... 16
2.4.3. RS 232 and RS 485 outputs ................................................................................... 16
2.4.4. Remote acknowledgement ..................................................................................... 18
3. STARTING UP ............................................................................................ 19
3.1. Checking the installation ............................................................................................... 19
3.2. Switching on the unit ...................................................................................................... 19
3.3. Operating modes ............................................................................................................ 20
3.3.1. Audio warning device (buzzer) .............................................................................. 20
3.3.2. Light-emitting diodes (LED) (Fig. 26) .................................................................. 20
3.3.3. Alarm thresholds .................................................................................................... 20
3.3.4. Fault thresholds ...................................................................................................... 25
3.3.5. Measuring unit ....................................................................................................... 26