The Siemens 6ES7231-7PB22-0XA0 EM 231 analog input module is a critical component for expanding the analog I/O capacity of the S7-200 PLC family. Designed for industrial automation applications, this module accepts standard analog signals from sensors, transmitters, and transducers, converting them into digital values for processing by the S7-200 CPU. With four differential or single-ended inputs, it offers reliable performance in temperature monitoring, pressure sensing, and flow control systems. The module features robust electrical isolation and a wide operating temperature range of 0°C to 55°C, making it suitable for harsh factory floor environments. Its compact form factor and plug-in design ensure seamless integration with existing S7-22X systems, while the onboard diagnostics provide real-time status feedback. For engineers requiring high accuracy and repeatability, the 6ES7231-7PB22-0XA0 delivers consistent results with minimal drift over time.
| Parameter |
Specification |
| Product Type |
Analog Input Module EM 231 |
| Model Number |
6ES7231-7PB22-0XA0 |
| Number of Inputs |
4 (differential or single-ended, configurable) |
| Input Resolution |
12 bits (plus sign bit for voltage mode) |
| Input Ranges (Voltage) |
0–10V, ±10V, 0–5V, ±5V (jumper selectable) |
| Input Ranges (Current) |
0–20mA, 4–20mA (jumper selectable) |
| Conversion Time |
250 microseconds per channel (typical) |
| Isolation |
500V AC between inputs and logic (transformer isolated) |
| Common Mode Rejection |
85 dB at 50/60 Hz |
| Operating Temperature |
0°C to 55°C (32°F to 131°F) |
| Storage Temperature |
-40°C to 70°C (-40°F to 158°F) |
| Power Consumption |
2.0 W from S7-200 backplane bus |
| Weight |
Approximately 120 g (0.26 lb) |
| Dimensions (W x H x D) |
71.2 mm x 80 mm x 62 mm (2.8 in x 3.15 in x 2.44 in) |
| Mounting |
DIN rail (35 mm) or panel mount |
| Connector Type |
Screw-type terminal block (removable) |
| Compatible CPUs |
S7-200 CPUs (CPU 222, 224, 226, and all S7-22X models) |
| Maximum Number per CPU |
Up to 7 modules (depending on CPU model) |
| Standards Compliance |
CE, UL, CSA, FM Class I Div 2 |
| Diagnostics |
LED status indicator for module and input status |
| Protection |
Overvoltage protection up to 24V DC on analog inputs |
What Does Our Clients Say
Mitsubishi MR-J4
Laura Navas
Great product!
2019/12/01
Keyence sensor
EQDR SALES
Original and fast!
2020/02/22