6ES7331-7KB02-0AB0

Product Overview

The SM 331 Analog Input Module is an isolated analog input module for SIMATIC S7-300.

Technical Specifications

• Supply Voltage (L+): Rated 24 V DC, reverse polarity protection included

• Input Current: Max 30 mA from L+ (without load), max 50 mA from backplane bus 5 V DC

• Power Loss: Typical 1 W

• Analog Inputs: 2 channels, 1 for resistance measurement

• Permissible Input Voltage (destruction limit): Max 20 V continuous, 75 V for 1 s (mark-to-space ratio 1:20)

• Permissible Input Current (destruction limit): Max 40 mA

• Constant Measurement Current (resistance-type transmitter): Typical 1.67 mA

• Resolution: 9/12/14 bits

• Supported Signals: Voltage, current, thermocouple, resistor

• Diagnostics & Alarm: Included

• Connection: 1×20-pole, removable/insertion with active backplane bus