Connecting - Siemens SIMATIC ET 200SP Manual

BaseUnits for I/O modules
3.11 BU20-P6+A2+4D (BU type C0)
3.11.2

Connecting

Pin assignment
Table 3- 11 Pin assignment for BaseUnit BU20-P6+A2+4D
Terminal
1 to 6
1A, 2A, AUX
1L, 2L, (P1) / 1N, 2N, (P2)
Block diagram
①
②
③
④
⑤
Figure 3-22
54
Pin assignment for BaseUnit BU20-P12+A2+4D
Assignment is determined by the I/O module.
See manual I/O Module
(http://support.automation.siemens.com/WW/view/en/55679691/133300).
Protective conductor connection or voltage bus freely usable up to 230 V AC/ DC with
max 10 A. If you connect a voltage, it must belong to the same potential group as the
rated supply voltage.
1L, 2L: Rated supply voltage up to 230 V AC with max. 10 A
1N, 2N: Neutral/ground
Backplane bus
I/O module
Terminals with connection to the I/O module
Interrupted voltage buses with connection to the terminals for infeed (via the plugged-in I/O
module)
Disconnected AUX busbar connected to the terminals
Block diagram BU20-P6+A2+4D
Descriptions
BaseUnits (6ES7193-6BP.../3RK1908-0AP00...)
Manual, 12/2016, A5E03727049-AG