Siemens SIMATIC S7-200 System Manual page 428

S7-200 Programmable Controller System Manual
EM 231 Analog Input, 4 Inputs
(6ES7 231- -0HC22- -0XA0)
Voltage
Unused
+- -
RA A+ A- - RB B+ B- - RC C+ C- - RD D+ D- -
250 Ohms (built-in)
M L+
+
24
VDC
Power
EM 232 Analog Output, 2 Outputs
(6ES7 232- -0HB22- -0XA0)
M0 V0 I0 M1 V1 I1
M L+
+
24
VDC
Power
Figure A-13 Wiring Diagrams for Analog Expansion Modules
414
Current
PS PS L+ M
+
0- -20mA 4- -20mA
+ -- --
M
Gain Configuration
EM 231 Analog Input, 8 Inputs
(6ES7 231- -0HF22- -0XA0)
Normal voltage input
+ 24 VDC
Power
Current inputs
Supply
(switch 1 and 2 closed
EM 232 Analog Output, 4 Outputs
(6ES7 232- -0HD22- -0XA0)
Short unused inputs