Siemens 6ES7234-4HE32-0XB0 SIMATIC S7-1200 SM 1234 4AI/2AO Analog I/O Module

The Siemens 6ES7234-4HE32-0XB0 is a SIMATIC S7-1200 SM 1234 combined analog I/O module with 4 inputs at 12-bit + sign (13-bit ADC) and 2 outputs at 14-bit (voltage) or 13-bit (current) resolution. Inputs accept +/-10 V, +/-5 V, +/-2.5 V, or 0/4-20 mA; outputs deliver +/-10 V or 0/4-20 mA.

Technical Specifications

Certifications & Standards

• CE mark
• CSA approval
• UL approval
• cULus
• FM approval
• RCM
• KC approval
• Marine approval

Selection Notes

Combining 4 inputs and 2 outputs on one module saves a slot compared to separate SM 1231/SM 1232 modules when a station needs both -- the trade-off is losing that flexibility if the input or output channel count doesn't match the fixed 4/2 split. The 100 m shielded cable length reflects the S7-1200's local-I/O design; for field devices further away, route through a distributed ET 200SP or ET 200MP station instead. Output resolution differs by type -- 14-bit for voltage, 13-bit for current -- which matters when specifying the closed-loop control precision an application needs from this module's analog outputs.

Applications

Mixed analog measurement and control on compact SIMATIC S7-1200 machines, combining temperature or pressure sensing with a proportional valve or VFD speed reference output from a single module.