SIEMENS SIMATIC S7-300, Analog Input SM 331 (6ES7331-7KF02-0AB0)
SIMATIC S7-300, analog input SM 331: Isolated 8-channel analog input module with 9/12/14-bit resolution, supporting voltage, current, thermocouple, and resistance inputs. Features alarm and diagnostic functions with hot-swappable capability in ET 200M configuration.
Technical Specifications
General Data
Module Type: SM 331 Analog Input
Number of Inputs: 8 channels
Hardware Functional State: FS04
Firmware Version: V2.0.0
Width: 40 mm
Weight: Approximately 280 g
Input Specifications
Signal Types: Voltage, Current, Thermocouple (Types E, J, K, L, N), Resistance Thermometer (Pt100, Ni100), Resistor
Resolution: Programmable, 9/12/12/14 bits + sign
Integration Time: Programmable (2.5 ms / 16.67 ms / 20 ms / 100 ms)
Basic Error Limit: Typically ±0.1% of selected measuring range
Permissible Cable Length: Up to 200 m for voltage/current signals with shielded cable
Electrical Data
Rated Supply Voltage (L+): 24 V DC
Permissible Voltage Range: 20.4 V DC to 28.8 V DC
Reverse Polarity Protection: Yes
Current Consumption (from L+): Max. 200 mA
Current Consumption (from 5 V Backplane Bus): Max. 50 mA
Power Loss: Typically 1 W
Connection & Functions
Required Connector: 20-pin front connector
Electrical Isolation: Yes, between channels and backplane bus/load circuit