Siemens SIMATIC S7-1200

Technical specifications
A.3 Digital I/O modules
Easy Book
296 Manual, 03/2014, A5E02486774-AF
Note
The high
-speed (200 kHz) SBs (SB 1221 and SB 1223) support only sinking inputs. The
standard SB
1223 supports only sourcing inputs.
The h
igh-speed (200 kHz) outputs (SB 1222 and SB 1223) can be either sourcing or sinking.
For sourcing outputs, connect "Load" to "
-" (shown). For sinking outputs, connect "Load" to
"+". Because both sinking and sourcing configurations are supported by the same
circuitry,
the active state of a sourcing load is opposite that of a sinking load. A source output exhibits
positive logic (Q bit and LED are ON when the load has current flow), while a sink output
exhibits negative logic (Q bit and LED are OFF when the l
oad has current flow). If the
module is plugged in with no user program, the default for this module is 0 V, which means
that a sinking load will be turned ON.
A.3.2
SM 1221 digital input (DI)
Table A- 17 SM 1221 digital input (DI)
Technical data
SM 1221 DI 8 24 VDC
SM 1221 DI 16 24 VDC
Order number
6ES7 221-1BF32-0XB0
6ES7 221-1BH32-0XB0
Number of inputs (DI)
See specifications (Page 302).
8 16
Dimensions W x H x D (mm)
45 x 100 x 75
45 x 100 x 75
Weight
170 grams
210 grams
Power dissipation
1.5 W
2.5 W
Current consumption SM Bus 105 mA 130 mA
24 VDC 4 mA / input used 4 mA / input used