Siemens 3RK1903-0BA00 SIMATIC ET 200S PM-D 24V DC Power Module

Overview

SIEMENS SIMATIC ET 200S Motor Starters

3RK1903-0BA00 SIMATIC ET 200S PM-D 24V DC Power Module

A PM-D power module that starts a new potential group and monitors the separate electronics and contactor supplies through PWR, CON and group diagnostics.

At a Glance

Brand	Siemens
Model	3RK1903-0BA00
Product Type	PM-D power module
Core Function	Supplying and monitoring a motor-starter potential group
Application	ET 200S motor starters and frequency converters

Two monitored supplies

U1 supplies the electronics and U2 supplies the contactors.

Local and bus diagnostics

PWR and CON indicate the supplies, while enabled group diagnostics report failures to the controller.

Matching terminal base

The PM-D plugs onto the TM-P15 S27-01 terminal module.

Product Overview

3RK1903-0BA00 starts an ET 200S motor-starter potential group with its associated terminal base and distributes the electronics and contactor supply voltages to the motor starters on its right.

The module monitors the U1 electronics supply and U2 contactor supply separately, with local indicators and optional group diagnostic messages for supply failures.

Ordering focus: Pair the PM-D with the TM-P15 S27-01 base and plan the two 24 V DC supply circuits, upstream protection and group-diagnostics setting.

Key Functions

Monitor both control-voltage paths

The PWR indicator monitors U1 and the CON indicator monitors U2, helping separate an electronics-supply interruption from a missing contactor supply.

Report failures through enabled group diagnostics

Group diagnosis can be enabled at module level to transmit diagnostic messages; disabling it also suppresses the SF fault indication.

Begin a new motor-starter potential group

The power module and its terminal module form the start of the group, with the connected motor starters positioned to the right.

Official Specifications

Rated Electronics and Contactor Supply	24 V DC
Permissible DC Supply Range	20.4–28.8 V
Rated Operating Current	10 A
Backplane-Bus Current Draw	Maximum 10 mA
U1-to-U2 Insulation Test Voltage	500 V
Supply and Fault Indicators	Green PWR for U1; green CON for U2; red SF for group error
Group-Diagnosis Parameter	Enable or Disable; factory setting Disable
Mounting Method and Position	Pluggable on terminal module; horizontal or vertical installation
Assembly Dimensions (Width × Height × Depth)	15 × 196.5 × 117.5 mm, including terminal module
Operating Ambient Temperature	0 to +60 °C
Storage and Transport Temperature	−40 to +70 °C
Relative Humidity During Operation	5–95%
Maximum Installation Altitude	2000 m above sea level
Front Protection	IP20; finger-safe to IEC 60529
Mechanical Resistance	Shock: 5 g for 11 ms; vibration: 2 g
Net Module Weight	53 g

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

Frequently Asked Questions

Why can the SF light stay dark on 3RK1903-0BA00 even when a supply fault is present?

Disabling group diagnosis also suppresses fault display on the SF LED.

Which supply should I inspect when the CON indication on 3RK1903-0BA00 is missing?

The CON indicator corresponds to the U2 contactor supply, while PWR corresponds to the U1 electronics supply.

Can I exchange 3RK1903-0BA00 while the station is operating?

The power module must not be inserted or removed during operation.

Where do the motor starters sit relative to 3RK1903-0BA00?

The motor starters belonging to the potential group are connected to the right of its power module.

Can 3RK1903-0BA00 supply ordinary ET 200S electronic modules as well as motor starters?

The PM-D supplies the supported motor starters and frequency converters rather than ordinary electronic modules or Ex-i modules.

How should I arrange U1 when using 3RK1903-0BA00 with High Feature starters ending in AB4?

For AB4 starters using extended startup data outside GSD or GSDML integration, supply U1 from the same voltage source as the interface module or provide reparameterization in the user program.

Which upstream protection is recommended for 3RK1903-0BA00?

Use a 10 A gL/gG fuse or a 10 A circuit breaker with trip characteristic B.

Compatibility & Ordering Notes

Before ordering 3RK1903-0BA00: Order the PM-D power module together with the correct TM-P15 S27-01 terminal base, retain separate U1 and U2 wiring, and include the required 10 A upstream protection.

Compatibility Checklist for 3RK1903-0BA00

• Use the TM-P15 S27-01 terminal module, article 3RK1903-0AA00, for the PM-D assembly.
• Position the connected motor starters to the right of the power module in the same potential group.
• Keep both DC supply circuits within 20.4–28.8 V and provide the specified upstream protection.
• Enable group diagnosis when bus reporting and the SF fault indication are required.
• For High Feature AB4 starter installations, account for the common U1 supply or user-program reparameterization requirement.
• Disconnect the affected supply before inserting or removing the power module.

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