Danfoss iC7 Series, Design Manual, Page: 5 / 150

Design Guide | iC7 Series Air-cooled System Modules
7.3 LCL Filter 51
7.4 The Pre-charging Unit 51
8
Control Unit
8.1 Modular Control Unit 53
8.2 Control Board 54
8.3 Definitions of the Indicator Lights on the Control Board 55
8.4 Control Board Connections 55
8.5 Star Coupler Board 57
8.6 Definitions of the Indicator Lights on the Star Coupler Board 59
8.7 Star Coupler Board Connections 60
8.8 I/O and Relay Option Connections 60
8.9 I/O and Relay Option Interface 63
8.9.1 Analog Inputs 63
8.9.2 Analog Outputs 64
8.9.3 Digital Inputs 64
8.9.4 Digital Outputs 65
8.9.5 Relay Outputs 65
8.9.6 Analog Reference Voltage Output 66
8.9.7 24 V DC Voltage Output 66
8.9.8 Thermistor Input 67
8.10 Assembling the Control Unit Mounting Plates 67
8.11 Attaching the Control Unit Mounting Plates 68
8.12 Installing the Control Unit 69
8.13 Installing Boards to the Modular Control Unit 69
8.14 Connecting the Fieldbus Cable and the Fiber Cables 70
8.15 Installing the Control Cables into the Control Terminals 71
8.16 Connecting the Control Panel 72
8.17 Fiber Cable Requirements 72
9
Maintenance
9.1 Preventive Maintenance Recommendations 73
9.2 Using the Product Modified Label 75
9.3 Replacing the RTC Battery 75
9.4 Removing the Fan Assembly 76
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