TM5SDI12D Modicon TM5 Digital Input Module 12DI 24V DC Sink

The TM5SDI12D is a Modicon TM5 digital input module with twelve 24 V DC sink inputs.

Its main advantage is medium-to-high input density. Twelve sensors or switching contacts can be connected within one compact TM5 slice using 1-wire field wiring.

The module is suitable for proximity sensors, limit switches, push buttons and relay contacts. Configurable software filtering helps suppress contact bounce and short signal disturbances.

Unlike TM5SDI4A, this module is designed for 24 V DC signals rather than 120–240 V AC inputs.

Key Features

• Twelve 24 V DC inputs
• Sink input logic
• Compact 1-wire connection
• 3.75 mA input current
• Configurable 0–25 ms filtering
• Individual input status LEDs
• 500 V AC input-to-bus isolation
• Medium-density sensor acquisition

Typical Applications

• Proximity sensor groups
• Conveyor status detection
• Limit-switch monitoring
• Packaging machinery
• Assembly equipment

12-Channel Input Density

TM5SDI12D provides twelve digital inputs in one electronic module.

It is suitable for machine sections that need more inputs than a six-channel module but do not require a full sixteen-channel input slice.

Compatible Input Devices

Typical connected devices include:

• 24 V DC proximity sensors
• Limit switches
• Push buttons
• Selector switches
• Relay contacts
• Machine status outputs

The connected device must provide a compatible 24 V DC signal and correct sink-input wiring.

Input Filtering

Software filtering can be configured from:

0 to 25 ms

Filtering helps reduce:

• Contact bounce
• Short electrical disturbances
• Unstable switch signals
• Intermittent sensor transitions

TM5SDI12D is intended for standard machine signals, not encoder or high-speed counter pulses.

Channel Isolation

The twelve inputs are not electrically isolated from one another.

The input electronics are separated from the TM5 bus electronics by specified 500 V AC insulation.

Sensors with large ground-potential differences may require external isolation.

TM5SDI12D vs TM5SDI6D

TM5SDI12D

12 inputs

1-wire connection

Higher channel density

Suitable for centralized sensor groups

TM5SDI6D

6 inputs

Supports 1-wire or 2-wire connection

Better suited to smaller distributed input groups

TM5SDI12D vs TM5SDI16D

TM5SDI12D

12 inputs

Lower channel count

Suitable for medium-sized sensor groups

TM5SDI16D

16 inputs

Maximum input density in one similar slice

Suitable for larger centralized input groups

TM5SDI12D vs TM5SDI4A

TM5SDI12D

24 V DC input signals

Fast DC sensor response

Used with proximity sensors and switches

TM5SDI4A

120–240 V AC input signals

Slower AC response

Used with AC control circuits

The modules are not interchangeable.

Required Accessories

A complete installed slice normally requires:

• TM5SDI12D electronic module
• Compatible white TM5 bus base
• Compatible terminal block
• 24 V DC I/O power segment

Confirm whether the base and terminal block are included before ordering.

FAQ

Q1: What is TM5SDI12D?

A1: It is a twelve-channel Modicon TM5 digital input module for 24 V DC sink signals.

Q2: What is the input current?

A2: Each active input draws approximately 3.75 mA.

Q3: Does it support input filtering?

A3: Yes. Software filtering can be configured from 0 to 25 ms.

Q4: Can it accept 120 V or 230 V AC?

A4: No. It is designed for 24 V DC signals.

Q5: Is it suitable for encoder counting?

A5: No. A dedicated high-speed counter module should be used for encoder pulses.

Q6: Are the input channels individually isolated?

A6: No. The twelve channels are not isolated from one another.

Q7: What distinguishes it from TM5SDI6D?

A7: TM5SDI12D provides twice the channel count and uses a compact 1-wire connection.

Q8: What distinguishes it from TM5SDI16D?

A8: TM5SDI12D provides twelve inputs for medium-density applications, while TM5SDI16D provides sixteen inputs for higher-density installations.