Technical Specifications
Model	CPU 1212C AC/DC/Relay		CPU 1212C DC/DC/Relay		CPU 1212C DC/DC/DC
Order number (MLFB)	6ES7 212-1BD30-0XB0		6ES7 212-1HD30-0XB0		6ES7 212-1AD30-0XB0
General
Dimensions W x H x D (mm)	90 x 100 x 75
Weight	425 grams		385 grams		370 grams
Power dissipation	11 W		9 W
Current available (SM and CM bus)	1000 mA max. (5 VDC)
Current available (24 VDC)	300 mA max. (sensor power)
Digital input current consumption (24 VDC)	4 mA/input used
CPU Features
User memory	25 Kbytes Work memory / 1 Mbytes Load memory/ 2 Kbytes Retentive memory
On-board digital I/O	8 inputs/6 outputs
On-board analog I/O	2 inputs
Process image size	1024 bytes of inputs/1024 bytes of outputs
Signal modules expansion	2 SMs max.
Signal board expansion	1 SB max.
Communication module expansion	3 CMs max.
Technical Specifications
Model		CPU 1212C AC/DC/Relay		CPU 1212C DC/DC/Relay		CPU 1212C DC/DC/DC
High-speed counters		4 total Single phase: 3 at 100 kHz and 1 at 30 kHz clock rate Quadrature phase: 3 at 80 kHz and 1 at 20 kHz clock rate
Pulse outputs		2 at 1 Hz pulse rate		2 at 100 kHz pulse rate
Pulse catch inputs		8
Time delay / cyclic interrupts		4 total with 1 ms resolution
Edge interrupts		8 rising and 8 falling (12 and 12 with optional signal board)
Memory card		SIMATIC Memory Card (optional)
Real time clock accuracy		+/- 60 seconds/month
Real time clock retention time		10 days typ./6 days min. at 40°C (maintenance-free Super Capacitor)
Performance
Boolean execution speed		0.1 μs/instruction
Move Word execution speed		12 μs/instruction
Real Math execution speed		18 μs/instruction
Communication
Number of ports		1
Type		Ethernet
Data rates		10/100 Mb/s
Isolation (external signal to PLC logic)		Transformer isolated, 1500 VDC
Cable type		CAT5e shielded
Power supply
Voltage range		85 to 264 VAC		20.4 to 28.8 VDC
Line frequency		47 to 63 Hz		--
Input current CPU only at max. load CPU with all expansion accessories at max. load		80 mA at 120 VAC 40 mA at 240 VAC 240 mA at 120 VAC 120 mA at 240 VAC		400 mA at 24 VDC 1200 mA at 24 VDC
Inrush current (max.)		20 A at 264 VAC		12 A at 28.8 VDC
Isolation (input power to logic)		1500 VAC		Not isolated
Hold up time (loss of power)		20 ms at 120 VAC 80 ms at 240 VAC		10 ms at 24 VDC
Internal fuse, not user replaceable		3 A, 250 V, slow blow
Sensor power
Voltage range		20.4 to 28.8 VDC		L+ minus 4 VDC min.
Output current rating (max.)		300 mA (short circuit protected)
Maximum ripple noise (<10 MHz)		< 1 V peak to peak		Same as input line
Isolation (CPU logic to sensor power)		Not isolated
Digital inputs
Number of inputs		8
Type		Sink/Source (IEC Type 1 sink)
Rated voltage		24 VDC at 4 mA, nominal

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