Siemens 3RK1903-0AA00 SIMATIC ET 200S TM-P15 S27-01 Terminal Module for PM-D

Overview

SIEMENS SIMATIC ET 200S Motor Starters

3RK1903-0AA00 SIMATIC ET 200S TM-P15 S27-01 Terminal Module for PM-D

A prewireable screw-terminal base for the PM-D power module, with separate electronics and contactor supplies, paired loop-through terminals and an included terminating cover.

At a Glance

Brand	Siemens
Model	3RK1903-0AA00
Product Type	Terminal module for the PM-D power module
Core Function	Feeding and looping the U1 and U2 potential groups
Application	ET 200S motor-starter assemblies

Two control supplies

U1 feeds the electronics and U2 feeds the contactor circuit.

Loop-through wiring

Paired terminals carry the corresponding potentials to the next connection.

AUX1 continuity

AUX1 passes through the base without terminal access.

Product Overview

3RK1903-0AA00 is the TM-P15 S27-01 terminal module for the ET 200S PM-D power module, providing the wiring base for the U1 electronics supply and U2 contactor supply.

The base consists of a support and screw-terminal block and can be prewired, while paired connection points allow the associated potentials to be looped through the assembly.

Ordering focus: Use the PM-D terminal-base combination, keep the U1 and U2 functions distinct, and match conductor preparation and tightening torque to the terminal limits.

Key Functions

Separate electronics and contactor power

U1 uses L+ and M for the electronics supply, while U2 uses A1+ and A2− for the contactor supply, with both circuits rated at 24 V DC.

Loop the required potentials through paired terminals

Terminal pairs 1/8, 2/9, 4/11, 5/12, 6/13 and 7/14 are bridged within the terminal module.

Prepare the station wiring before plugging the power module

The support and terminal-block arrangement allows prewiring of the base, and AUX1 passes through without an external terminal connection.

Official Specifications

Rated U1 and U2 Operating Voltage	24 V DC for the electronics and contactor supply circuits
Rated Operating Current	10 A
Rated Insulation Voltage	500 V
Field-Terminal Construction	Screw-type terminals
Connectable Conductor Sizes	Solid: 0.14–2.5 mm²; finely stranded with ferrule: 0.14–1.5 mm²; AWG 18–22
Terminal Tightening Torque	0.4–0.7 N·m
Internally Bridged Terminal Pairs	1/8, 2/9, 4/11, 5/12, 6/13 and 7/14
AUX1 Bus Arrangement	Throughfeed without terminal access
Width and Depth	15 mm width; 102 mm terminal-base depth; 117.5 mm depth with PM-D fitted
Front Protection	IP20; finger-safe according to IEC 60529
Net Weight	0.22 kg
Supplied Cover	Terminating cover included

Official source:Siemens ET 200S Motor-Starter Manual · Siemens Product Data Sheet

Frequently Asked Questions

What is the difference between the U1 and U2 connections on 3RK1903-0AA00?

U1 provides the 24 V DC electronics supply and U2 provides the separate 24 V DC contactor supply.

Which terminals provide L+ and M for U1 on 3RK1903-0AA00?

L+ is connected at terminals 1 and 8, and M is connected at terminals 2 and 9.

Where do I connect the contactor supply on 3RK1903-0AA00?

Connect U2 through A1+ at terminals 4 and 11 and A2− at terminals 5 and 12.

Can I loop the potential onward through 3RK1903-0AA00 without adding an external bridge?

The designated terminal pairs are already bridged internally and can be used to loop their corresponding potentials through.

Can I prewire 3RK1903-0AA00 before the PM-D power module is inserted?

The terminal module supports prewiring through its separate support and terminal-block arrangement.

What tightening torque should I use on the screw terminals of 3RK1903-0AA00?

Tighten the terminal screws to 0.4–0.7 N·m using a standard size-1 screwdriver.

Does 3RK1903-0AA00 provide a field terminal for AUX1?

AUX1 is passed through the terminal module without an external terminal connection.

Compatibility & Ordering Notes

Before ordering 3RK1903-0AA00: Specify the TM-P15 S27-01 base for the PM-D power module and plan the separate U1 and U2 feeds, loop-through conductors and terminating cover in the station layout.

Compatibility Checklist for 3RK1903-0AA00

• Use the terminal module with the corresponding PM-D power module in the ET 200S motor-starter assembly.
• Keep the 24 V DC electronics feed U1 and contactor feed U2 correctly assigned to their terminal pairs.
• Select conductors within the specified solid, ferruled or AWG limits and tighten terminal screws to 0.4–0.7 N·m.
• Use the internally bridged pairs only for their assigned potentials, including the documented safety-system AUX2 and AUX3 connections when applicable.
• Include the supplied terminating cover in the completed station arrangement and allow for the depth of the fitted PM-D assembly.

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