Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Product type | CPU 1212C AC/DC/relay |
| Digital inputs | 8 integrated DI, 24 V DC |
| Digital outputs | 6 relay DO, 2 A maximum with resistive load |
| Analog inputs | 2 voltage AI, 0 to +10 V |
| Analog input resolution | 10 bit including overrange |
| Analog input conversion time | 625 μs per channel |
| Power supply | 85 V AC to 264 V AC, 47 Hz to 63 Hz |
| PROFINET interfaces | 1 isolated interface, RJ 45 |
| Program/data memory | 50 KB |
| Load memory | 1 Mbyte |
| Protection | IP20 |
| Mounting positions | All mounting positions; up to 40 °C, maximum 8 |
Applications
- Controlled positioning: The CPU supports controlled positioning through its technological functions.
- PID control: The CPU supports PID controller functions.
- Frequency measurement: The CPU supports frequency measurement with counters up to 100 kHz.
Key Features
- Onboard digital I/O: 8 integrated digital inputs at 24 V DC and 6 relay outputs; the outputs have a maximum resistive-load switching capacity of 2 A.
- Analog inputs: 2 analog voltage inputs support 0 to +10 V, with 10-bit resolution including overrange and a conversion time of 625 μs per channel.
- AC power supply: Power supply: 85 V AC to 264 V AC at 47 Hz to 63 Hz; rated values include 120 V AC and 230 V AC.
- PROFINET interface: 1 isolated PROFINET interface with RJ 45 connection, automatic transmission-rate detection, autonegotiation, and autocrossing.
- Communication protocols: Supports PROFINET IO Controller, PROFIBUS, TCP/IP, ISO-on-TCP (RFC1006), UDP, MODBUS, and S7 communication.
- Diagnostics and protection: Has a diagnostic buffer, forcing, status/control variables, and IP20 protection. Digital outputs do not have short-circuit protection; it must be provided externally.
Frequently Asked Questions
1. What I/O does the Siemens 6ES7212-1BE31-0XB0 have?
It has 8 integrated 24 V DC digital inputs, 6 relay digital outputs, and 2 analog voltage inputs supporting 0 to +10 V. It has no analog outputs.
2. What power supply does CPU 1212C use?
The power supply is 85 V AC to 264 V AC at 47 Hz to 63 Hz, with rated values of 120 V AC and 230 V AC.
3. Which interface and protocols are supported?
It has 1 isolated PROFINET interface with an RJ 45 connection and supports PROFINET IO Controller, PROFIBUS, TCP/IP, ISO-on-TCP (RFC1006), UDP, MODBUS, and S7 communication.
4. Does the module include short-circuit protection for relay outputs?
No. Short-circuit protection for the digital outputs must be provided externally.
