IFM X20DI9371 Digital Input Module

X20DI9371 Model Code Breakdown

X20: B&R X20-series I/O system (shared platform after IFM acquired B&R’s automation business)

DI: Digital Input

9371: Module specification code

16-channel 24VDC digital input module compatible with sourcing/sinking types, designed for mounting on industrial standard X20 bus baseplates

Brand Lineup: IFM efector / B&R X20 I/O Series

Parameter	Specification
Number of Input Channels	16 digital inputs
Rated Input Voltage	DC 24 V (Operating range: 18–30 VDC)
Input Type	Universal NPN/PNP (compatible with sinking/sourcing sensors)
Input ON Threshold (High Level)	≥11 VDC
Input OFF Threshold (Low Level)	≤5 VDC
Typical Single-Channel Input Current	2.5 mA
Fixed Debounce Filter Time	1 ms (extendable via software configuration)
Bus Interface	Internal high-speed X20 backplane bus
Power Supply	Module logic powered by backplane; field sensors powered by external 24V DC supply
Electrical Isolation	Galvanic isolation per group of 8 channels
Protection Class	IP20 (for cabinet installation only)
Operating Temperature Range	-20 ℃ to +60 ℃
Mounting Method	DIN rail daisy-chain mounting on standard X20 baseplates

III. Hardware Structure

Channel Grouping: 16 digital inputs split into two isolated groups: CH0~CH7 and CH8~CH15
Terminal Design: Spring-cage terminals for tool-free fast wiring
Status Indicators: Individual green LED per channel (lit = active signal); dedicated RUN and ERR LEDs for bus fault diagnosis
Dimensions: Standard narrow X20 module with 12.5 mm width
Software Configuration & Compatibility
Supported Controllers: IFM X20 / B&R X20 PLCs (X20CP, X20XC CPU series)
Programming Software: All versions of Automation Studio (AS3.0 to AS4.9)
Functional Features

Channel short-circuit and wire break diagnostics (supports 2-wire sensors with line monitoring)

Event timestamping for high-speed signal capture

Configurable channel signal inversion logic

Typical Application Scenarios
Digital signal acquisition for machine limit switches, photoelectric sensors and proximity switches
Feedback signal collection for production line position sensors, safety gates and emergency stop circuits
Centralized digital signal acquisition for packaging machinery, machine tools and material handling conveyors
I/O expansion for complete IFM automated production lines
Cross-Series & Replacement Reference

Direct Drop-In Replacements (Fully Functionally Identical)

X20DI9371 (16-channel universal 24V digital input)

No revised suffix variants; identical model is fully interchangeable.

Distinction of Similar Models

X20DI9372: 16-channel DI with enhanced diagnostic functions, pin-compatible hardware
X20DI2371: 8-channel DI with half the channel count
X20DO9321: 16-channel digital output module; cannot replace input modules

VII. Packing List

Standard Included Items

Optional Separately Purchased Accessories

X20TB standard terminal baseplates (for daisy-chain expansion)

X20AC0100 bus termination cover

X20CA0100 expansion connecting cable

VIII. Common Fault Troubleshooting Matrix

Fault Symptom	Root Cause	Resolution Steps
Steady red ERR LED on module	Faulty backplane bus communication / poor baseplate contact	1. Re-seat the module; 2. Verify termination covers at both ends of X20 bus; 3. Restart CPU
Channel LED remains off despite sensor output	1. Loose wiring; 2. Reversed input polarity; 3. Missing sensor power supply	Check 24V power supply, NPN/PNP wiring logic, and fasten spring terminals
Frequent false signal triggering	Insufficient debounce filter time, cable electromagnetic interference	Increase input filter duration to 5–10 ms in Automation Studio; apply shielding and grounding to signal cables
Complete signal loss for a full group of 8 channels	Broken isolated power supply for the group, disconnected common COM terminal wiring	Inspect 24V wiring for each group’s common COM terminal

Sourcing & Classification Supplementary Information
Customs HS Code (Industrial Control I/O Module): 8537109000
Certifications: CE, UL, GL marine classification certification; compliant for equipment export to Europe and North America