Control Unit Cabling; Control Cable Sizing - Siemens BT300 Manual

Siemens Industry, Inc. • 48
5.1

Control unit cabling

The basic control unit connections are presented in Figure 45 below. 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 (see Table 26 and Table 27). All signal descriptions are given in Tables 25 to 27.
21 22 23
12 13 14 15 16 17 18 19 30 A B
1
5.1.1

Control cable sizing

The control cables shall be at least 0.5 mm
maximum terminal wire size is 2.5 mm
Find the tightening torques of the control and relay board terminals in Table 24 below.
Terminal screw
All I/O and relay terminals
(screw M3)
24 25 26
2 3 4 5
Figure 45. Basic Control Terminals.
2
(30 AWG) screened multi-core cables, see Table 14. The
2
(14 AWG) for the relay and other terminals.
Table 24. Control cable tightening torques
32 33
6 7 8 9 10 11
Tightening torque
Nm
0.5
24-hour support +1-800-877-7545 (Dial 2)
Control unit
lb-in.
4.5