Siemens SIMATIC ET 200AL System Manual page 526

Wiring
3.1 Terminal and block diagram
The example in the following figure shows the pin assignment for voltage and current output
of the analog output module AQ 4xU/I 4xM12.
①
Voltage/current output as 2-wire connection
②
Voltage/current output as 4-wire connection
③
Output driver
④
Digital-to-analog converter (DAC)
⑤
Microcontroller
⑥
ET-Connection interface
⑦
Internal supply voltage
X10 to X13 Channels 0 to 3
X80 Infeed of supply voltages
X81 Loop-through of supply voltages
X30 Infeed of the ET-Connection
Figure 3-1 Terminal and block diagram for voltage and current output
12
X31 Loop-through of the ET-Connection
1L+ Supply voltage 1L+ (non-switched)
1M Ground 1M (non-switched)
2L+ Load voltage 2L+ (switched)
2M Ground 2M (switched)
1U 24 V actuator supply
A
QV /QI + Voltage/current output positive, channel n
n n
QV /QI - Voltage/current output negative, channel n
n n
AQ Channel status LEDs (0, 1, 2 and 3) (green)
DIAG Diagnostic status LED (red/green)
Analog output module AQ 4xU/I 4xM12 (6ES7145-5ND00-0BA0)
3
Manual, 12/2016, A5E38687953-AA