Siemens SIMATIC ET 200SP Manual page 45

Pulse width modulation operating mode
5.1 Connecting
Connection: 2-wire connection of actuators
The figure below shows an example for the terminal assignment of the digital output module
DQ 4×24VDC/2A HS on the BaseUnit BU type A0 without AUX terminals (2-wire
connection).
①
2-wire connection
②
Backplane bus interface
③
Control unit
④
Polarity reversal protection
⑤
Color-coded label CCxx (optional)
⑥
Supply voltage filter circuit (only when light
BaseUnit is present)
DQ + Output signal pulse width modulation, channel n OVS
n
DQ - Reference output signal, channel n
n
Figure 5-1 Block diagram and terminal assignment for 2-wire connection of actuators
44
24 V DC Supply voltage L+ (infeed for light BaseUnit
only)
M Ground
P1, P2, AUX Internal self-configuring voltage buses
Connection to left (dark BaseUnit)
Connection to left interrupted (light BaseUnit)
DIAG Error or Diagnostics LED (green, red)
.0, .1, .2, .3 Channel status LED (green)
PWM Pulse width modulation LED (green)
Oversampling LED (green)
PWR Power LED (green)
Digital output module DQ 4x24VDC/2A HS (6ES7132-6BD20-0DA0)
Manual, 06/2018, A5E32855695-AC