SIEMENS 6ES5451-8MR12 S5 Relay Output Module

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SIEMENS 6ES5451-8MR12 is a compact SIPART DR20 process controller for single-loop PID control of temperature, pressure, flow, and level. Standard controller variant with 2 current analog inputs (4–20 mA), continuous S output, 1 digital input and 1 digital output. AC 220/240 V, 21 VA, IP20/30/64, DIN 43700 panel mount, approx. 1.0 kg.

Tags: EMERSON FLOBOSS S600+, EMERSON MMS3210/022-000, EMERSON SLS1508 K2201X1-BA1

SKU: 6125637-1-1-1-2-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1

SIEMENS 6ES5451-8MR12 S5 Relay Output Module

The SIEMENS 6ES5451-8MR12 is a compact SIPART DR20 process controller designed for single-loop closed-loop control of temperature, pressure, flow, level, and other process variables. As the standard-controller variant of the DR20 family, it combines analog current inputs, a continuous S output, and digital I/O in a DIN 43700 panel-mounted housing. It is widely used in power plants, water treatment, and process industries as a standalone PID controller or as a backup/manual-loading station in larger control schemes.

Key Specifications

Manufacturer:SIEMENS
Order Number:6ES5451-8MR12
Product Family: SIPART DR20 Process Controller
Product Type: Compact digital controller (standard controller with S output)
Analog Inputs: 2 × current inputs (4–20 mA)
Analog Output: 1 × S output (continuous control output)
Digital I/O: 1 × digital input, 1 × digital output
Control Function: PID closed-loop control with auto/manual mode
Power Supply: AC 220/240 V
Power Consumption: 21 VA / 13 W max
Protection Rating: IP20/30/64
Mounting: DIN 43700 panel cut-out (compact faceplate)
Weight: Approx. 1.0 kg

Key Features

Proven Single-Loop Control: Reliable PID control for one process variable with setpoint, manual, and auto modes selectable on the front panel.
Compact Panel Design: Standard DIN 43700 cut-out; small faceplate saves panel space in cabinets and consoles.
Isolated, Industry-Grade I/O: Current inputs and S output are designed for 4–20 mA process instrumentation, with digital input/output for enable, alarm, or status functions.
Robust Construction: IP64-protected front (IP20 housing) suited to control room environments; simple mechanical configuration and parameterization.
Long-Service Product Line: The SIPART DR20 remains a supported spare for installed process control panels, with plug-in replacement for existing DR20 units.