Schneider TBXEEP1622 Discrete Input Module – 16 Channels

The Schneider TBXEEP1622 captures digital signals from field sensors and switches. This discrete input module serves the Modicon TBX Series automation platform. You can connect push buttons, limit switches, and proximity sensors directly. The unit provides 16 channels in a compact, standalone enclosure.

Input Specifications and Electrical Ratings

The Schneider TBXEEP1622 accepts both sinking and sourcing field devices. This discrete input module draws only 7 mA per active channel. You can monitor up to 16 field devices without external adapters. The unit ignores voltage below 5 VDC as a valid off signal.

Physical Dimensions and Weight

This discrete input module weighs 0.32 kg for flexible mounting options. The unit measures 125 mm tall by 85 mm wide. Its depth reaches 55 mm including the terminal block. You can mount the Schneider TBXEEP1622 on a 35 mm DIN rail or directly to a panel.

Interface and Wiring Connections

A 20-position removable screw terminal block handles all field wiring. This terminal block accepts wire sizes from 0.2 to 1.5 mm². You will find 16 dedicated input terminals plus one common return terminal. Each channel features a green LED indicator for visual status confirmation. The front label shows clear numbering from 0 to 15 for easy identification.

Energy Storage and Internal Circuitry

The Schneider TBXEEP1622 stores minimal energy for input filtering. Each channel includes a 10 µF capacitor for contact debouncing. These 16 capacitors provide a total storage of 160 µF at 24 VDC. The module does not contain any battery for configuration retention. Sixteen optocouplers provide complete isolation between field and logic circuits.

Component Layout and Construction

Thirty-two resistors set the correct current for each input channel. Sixteen zener diodes protect against overvoltage events up to 36 VDC. The circuit board uses a two-layer FR4 substrate for reliable performance. You will find 112 individual components soldered on both sides. The Schneider TBXEEP1622 includes no user-serviceable fuses or relays. A built-in status LED reports module health and communication activity.

Operational Use and System Integration

Transitioning to this module expands your TBX digital input capacity efficiently. You can monitor 16 field devices using one compact unit. The module works with 2-wire or 3-wire DC sensors without external power. Use the Schneider TBXEEP1622 for emergency stops, guard monitoring, or part detection. For best results, avoid routing input wires alongside high-power AC cables. This module supports direct connection to TBX Series controllers via the backplane interface.