Control Cable Sizing; Control Terminals And Dip Switches - Siemens BT300 Installation Instructions Manual

Chapter 5 - Control Unit

Control Cable Sizing

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main circuit (for example, DC-link voltage, unit temperature) are not available when line
voltage is not connected.
Control Cable Sizing
The control cables shall be at least 0.5 mm
Power Cabling
the table in the
AWG) for the relay and other terminals.
The following table outlines the tightening torques of the control and relay board
terminals.
Table 19: Control Cable Tightening Torques.
Terminal Screw
All I/O and relay terminals (screw M3)

Control Terminals and DIP Switches

The basic control unit connections are presented in the following figure. The control
board is equipped with 22 fixed control I/O terminals and the relay board with 8 or 9.
The relay board is available in two different configurations.
The terminals of the Basic I/O board
more information on the connections, see the following figure.
The terminals shown on shadowed background are assigned for signals with optional
functions selectable with DIP switches. See more information in the
Functions and Isolating Digital Inputs from Ground with DIP Switches
Siemens BT300 HVAC Drive Installation
Instructions
(30 AWG) screened multi-core cables, see
2
section. The maximum terminal wire size is 2.5 mm
Tightening Torque
Nm
0.5
and the Relay boards
(14
2
lb-in.
4.5
are described below. For
Selecting Terminal
section.
DPD01148
2016-06-28