Siemens SIMATIC S7-1200 CPU 1217C DC DC DC PLC 6ES7217-1AG40-0XB0

Siemens SIMATIC S7-1200 CPU 1217C DC DC DC PLC 6ES7217-1AG40-0XB0

6ES7217-1AG40-0XB0 identifies the Siemens SIMATIC S7-1200 CPU 1217C compact PLC in the DC/DC/DC configuration. It combines a 24 V DC controller supply, DC digital inputs and transistor digital outputs in one compact unit. The controller includes fourteen digital inputs, ten digital outputs, two analog voltage inputs and two analog current outputs. It belongs to the conventional S7-1200 generation. The complete ordering number is essential when selecting a replacement, since similarly named CPU 1217C products can have different supply arrangements, output technologies and generation-specific expansion hardware.

Built-in Inputs and Outputs

The fourteen onboard digital inputs comprise ten 24 V DC inputs and four differential inputs with RS-422/485 electrical characteristics. The ten digital outputs comprise six sourcing transistor outputs for 24 V DC loads, rated at 0.5 A per channel, and four differential outputs. The differential channels are high-speed signal circuits, not 24 V load outputs or general-purpose serial communication ports. Use compatible differential receivers and observe the specified termination and wiring. The differential output specification is a minimum of 2 V across 100 ohms or 1.5 V across 54 ohms. Do not apply the 0.5 A load rating to these differential outputs. Two analog voltage inputs measure 0–10 V DC, and two analog current outputs provide 0–20 mA signals. Observe load limits and provide suitable protection for field circuits.

Communication and Programming

Two integrated RJ45 Ethernet/PROFINET ports provide the engineering and network connections through one PROFINET interface. The two physical ports do not represent two independent network interfaces. The physical connector and the configured communication service are separate specifications. PROFINET and SIMATIC communication require appropriate network configuration; serial communication requires a compatible optional CB or CM. Engineering uses SIMATIC STEP 7 in TIA Portal, with LAD, FBD and SCL programming. Current Siemens catalog data lists firmware V4.7 with STEP 7 V20 or higher. Check the firmware installed on a particular unit before choosing software. Software licenses, Ethernet cables and optional communication hardware are separate purchases unless explicitly included by the supplier.

Memory and Technology Functions

Current Siemens information lists 250 KB of integrated program/data work memory. Load memory and removable memory-card capacity are separate quantities. Earlier firmware-era documentation can list different capacities, so check the actual controller when replacing an installed unit. Up to six high-speed counter functions can be configured. Differential inputs Ib.2 to Ib.5 support up to 1 MHz in single-phase or quadrature operation. Inputs Ia.0 to Ia.5 support up to 100 kHz single-phase or 80 kHz quadrature; Ia.6 to Ib.1 support up to 30 kHz or 20 kHz respectively. Up to four pulse-output functions can be configured. Differential outputs Qa.0 to Qa.3 support up to 1 MHz, while the six 24 V outputs Qa.4 to Qb.1 support up to 100 kHz. Terminal assignment, receiver compatibility, technology-object configuration and operating conditions determine the usable arrangement. Pulse channels and independently controlled axes must not be treated as equivalent counts.

Expansion Capability

CPU 1217C supports up to eight local signal modules, up to three communication modules and one shared position for an SB, CB or BB. These limits remain subject to the CPU power budget and compatible hardware. Using eight SM 1223 modules with 16 DI and 16 DO each gives 142 digital inputs and 138 digital outputs including the CPU. Adding a four-input SB 1221 gives a local maximum of 146 digital inputs. Alternatively, a four-output SB 1222 gives a local maximum of 142 digital outputs. These are separate maximum configurations and cannot be achieved simultaneously because the boards occupy the same position. A two-input/two-output SB 1223 instead permits 144 DI and 140 DO together. These calculated physical totals exclude analog channels and remote I/O. Verify the complete module power budget before adding communication hardware. These totals include the four onboard differential inputs and four onboard differential outputs; they are not all 24 V channels.

Installation and Typical Applications

The controller requires 24 V DC nominal, with a permissible range of 20.4–28.8 V DC. Size the supply for the CPU, connected modules, sensors and load circuits using their respective power requirements. The enclosure rating is IP20, and installation requires a suitable control cabinet. The CPU measures 150 × 100 × 75 mm and supports DIN-rail or direct panel mounting. Allow additional space for wiring, ventilation and expansion modules. Technically suitable applications include machine sequencing, conveyor sensor monitoring, production counting, analog transmitter monitoring and pulse-command interfaces to compatible drives. Outputs must operate within their electrical ratings; motors and other substantial loads require suitable external switching or drive equipment.

Exact Variant and Documentation

Use documentation for the exact DC/DC/DC article when checking replacement wiring and compatibility. Other S7-1200 CPUs and S7-1200 G2 products must not be treated as interchangeable with this mixed-I/O CPU. Verify the installed firmware, terminal assignments and optional module articles before commissioning. Standard PLC logic does not establish a safety-rated control function. The specified 12 Months warranty is the requested seller policy, not a verification of Siemens warranty terms.

Official Manufacturer Links

Official Manufacturer Product Page: https://mall.industry.siemens.com/mall/en/ua/Catalog/Product/6ES7217-1AG40-0XB0

Official Manufacturer Datasheet / Technical Documentation: https://support.industry.siemens.com/teddatasheet/?caller=SIOS&format=pdf&language=en&mlfbs=6ES7217-1AG40-0XB0

Siemens SIMATIC S7-1200 CPU’s

• Siemens SIMATIC S7-1200 CPU