Siemens 6ES7138-6DB00-0BB1 ET 200SP TM Pulse 2x24V PWM/Pulse Output Module

The Siemens 6ES7138-6DB00-0BB1 is a SIMATIC ET 200SP TM Pulse module with 2 PWM/pulse output channels rated 2 A at 24 V DC, built for driving proportional valves and DC motors directly from the I/O station. Each channel supports pulse-width modulation up to 100 kHz in High Speed mode, current measurement, and closed-loop current control, with a shared 24 V encoder supply for feedback sensors.

Technical Specifications

Selection Notes

The 2 A/2 A channel rating with a High Speed output mode up to 100 kHz separates this module from a standard DQ module: the High Speed path derates current to 0.1 A, so it suits proportional-valve dithering and fast pulse trains rather than direct 2 A loads at high frequency, while the Standard output path holds the full 2 A at up to 10 kHz. Both channels share one 300 mA, 24 V encoder supply, so total sensor feedback current across the pair is the limiting factor when wiring two proportional valves with position feedback. Built-in current measurement and closed-loop current control on each channel remove the need for an external valve driver in ET 200SP stations that already run S7-1200/1500 or PROFINET/PROFIBUS masters.

Applications

Direct control of proportional hydraulic/pneumatic valves and small DC motors from a decentralized ET 200SP station, including dithered PWM valve drive, frequency/pulse-train output for stepper-style positioning, and closed-loop current-controlled valve actuation.