Emerson Motion Control EP-125F-A Digital Input Module

The Emerson Motion Control EP-125F-A is a 16-channel digital input module engineered for PACSystems RSTi-EP industrial automation architectures. This compact 11.5 mm slice supports positive logic inputs at 24 VDC (20.4–28.8 VDC operating range) and integrates across PROFINET RT, PROFIBUS, Modbus TCP, and EtherCAT networks. Hot-swappable design with module and channel status LEDs enables rapid diagnostics and field replacement.

Technical Specifications

Input Points: 16 channels, positive logic

Supply Voltage: 24 VDC (20.4–28.8 VDC range)

System Current Consumption: 8 mA

Input Current Consumption: 52 mA

Input Thresholds: >11 VDC on, <5.0 VDC off

Input Delay (I/O Scan Time): 3 ms

System Bus: RSTi-EP, 48 Mbps max transfer rate

Bus Performance: Reads up to 256 DI/DOs in 20 ms

Physical Dimensions: 120 × 76 × 11.5 mm

Weight: 87 grams

Mounting: DIN rail

Protection Rating: IP20

Operating Temperature: −20 to +60 °C

Storage Temperature: −40 to +85 °C

Humidity: 5–95% non-condensing

Key Features

1-wire sensor connectivity with reverse polarity protection

Hot-swap capability for uninterrupted system operation

General module diagnostics with LED status indicators

Hazardous location certification: Class 1 Division 2 (Groups A, B, C, D), ATEX Zone 2, ISA 12.12.01:2007, SIL 3

Global compliance: UL 508, CSA C22.2, CE, CCC, DNV GL

Typical Applications High-density industrial control cabinets requiring distributed digital input acquisition in process automation, machinery control, and safety-critical systems operating in ordinary and Class 1 Division 2 hazardous locations.

Compatibility & Integration Designed exclusively for PACSystems RSTi-EP systems. Supports up to 1024 I/O points per drop across multiple industrial communication protocols, enabling flexible network architecture in mixed-protocol environments.