Emerson ECB-D20, Technical Information

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Technical Information
Tables
Table 1: Connector assignment ..................................................................................................................... 7
Table 2: Logic safety chain ............................................................................................................................. 9
Table 3: Modbus DIP switches ..................................................................................................................... 15
Table 4: Modbus Addresses ............................................................................................................................ 15
Table 5: Defrost Modes ................................................................................................................................... 27
Table 6: Relay Functions ................................................................................................................................. 31
Table 7: Digital Input Configuration ................................................................................................................. 31
Table 8: Alarm Codes ...................................................................................................................................... 39
Table 9: Technical Data ................................................................................................................................... 42
Figures
Figure 1 Refrigeration cycle ............................................................................................................................... 5
Figure 2 Connector position on PCB ................................................................................................................. 8
Figure 3 Modbus wiring ..................................................................................................................................... 9
Figure 4 RJ 45 to XJ485USB adapter cable.................................................................................................... 10
Figure 5 Jumpers ............................................................................................................................................. 10
Figure 6 Bus termination.................................................................................................................................. 11
Figure 7: Safety Concept ................................................................................................................................. 12
Figure 8: Sensor positions ............................................................................................................................... 13
Figure 9: EXV Connection ............................................................................................................................... 14
Figure 10: EXM/EXL-246 Windings ................................................................................................................. 14
Figure 11: DIP switch ....................................................................................................................................... 16
Figure 12 Internal Modbus Wiring ................................................................................................................ 17
Figure 13 Fixed speed control ......................................................................................................................... 19
Figure 14 Variable speed control ..................................................................................................................... 19
Figure 15 Fix speed control ............................................................................................................................. 20
Figure 16 Variable speed control ..................................................................................................................... 20
Figure 17: Shift of Defrost Interval’s by ModBus Address ............................................................................... 22
Figure 18: Demand Defrost Detection ............................................................................................................. 25
Figure 19: Deadband Control .......................................................................................................................... 26
Figure 20: Synchronized Defrost ..................................................................................................................... 28
Figure 21: Pack Defrost Compressor Delay at Hot Gas Defrost ..................................................................... 28
Figure 22: Pack Cycle Compressor Delay at Thermostat Emergency Operation ........................................... 29
Figure 23: Pack Controller Dead Band Mode .................................................................................................. 29
Figure 24: Pack Controller Percentage Mode ................................................................................................. 29
Figure 25 Pack One-shot Mode ....................................................................................................................... 33
Figure 26 Hotgas defrost sequence with / without 4way-Valve switching ....................................................... 34
Figure 27: Display unit ECD-D05/06 ............................................................................................................... 34
Figure 28: Defrost Phases ............................................................................................................................... 37