B&R 3DI476.6 Digital Input Module

Basic Model Information

Model: 3DI476.6

Product Series: B&R System 2005 Automation System (Obsolete)

Alternative Platform: X20 Series Digital Input Modules

2. Core Technical Specifications

3. Terminal Definition Overview

The 16 channels are divided into two groups:

Group1: DI0～DI7

Group2: DI8～DI15

Each group has an independent COM terminal, supporting wiring for NPN (sinking) / PNP (sourcing) sensors.

4. Phase-out & Upgrade Replacement Solution

⚠️ 3DI476.6 has been officially discontinued by the manufacturer. No new original units available; only surplus stock or used modules are on the market.

Recommended Functional Replacement on X20 Platform

X20DI4371 (16DI, 24VDC, group isolation, functional equivalent to 3DI476.6)

Key Differences:

1. Hardware racks are incompatible: X20 modules cannot be plugged directly into System 2005 racks. Full controller platform upgrade is required (CPU + entire backplane).
2. Program: Project migration and IO address remapping are needed; B&R Automation Studio supports variable migration.

Spare Part Temporary Solution

Only surplus new stock or refurbished modules can be sourced. Verify production year and intact terminal blocks before purchase.

5. Typical Application Scenarios

Digital signal acquisition for machine tools, packaging machinery, material handling conveyors, plastic & rubber equipment: proximity sensors, photoelectric sensors, pushbuttons, limit switches, relay contact signals.

6. Common Troubleshooting Guidelines
7. No signal on channel: Measure 24V supply and COM wiring; verify sensor type (NPN/PNP) matches COM wiring configuration.
8. Signal flickering / false triggering: Apply cable shielding, reduce line voltage drop, adjust input filter time parameters in Automation Studio.
9. No channel faults reported but all channels inactive: Check backplane power supply and ensure module bus latches are fully engaged.
10. Model Selection Pitfalls

❌ X20 modules cannot be inserted into System 2005 racks directly;

❌ Evaluate overall CPU upgrade costs for large-scale renovation of legacy machines; prioritize spare parts stocking for small equipment;

✅ Do not select 3DI476.6 for new projects; uniformly adopt X20 series.

Complete Matching Module List for B&R 3DI476.6 (System2005 Platform)

All modules must be installed on System2005 backplanes (3BPxxxx). Hardware is not compatible with X20 series. The whole product line is obsolete; only surplus or refurbished spare parts available.

1. Basic System Hardware (Mandatory for Rack Assembly)

(1) Power Supply Modules (Backplane Power)

3PS465.9: 24VDC 50W, with expansion interface

3PS477.9: 24VDC 50W, supports remote expansion rack 3EX350

(2) Backplane Base (Module Carrier)

3BP155.4 / 3BP155.41: 6-slot backplane (41 version with battery compartment)

3BP152.4 / 3BP152.41: 9-slot backplane

3BP151.4 / 3BP151.41: 12-slot backplane

3BP150.4 / 3BP150.41: 15-slot backplane

(3) CPU Controller Modules

3CP260.60-1

3CP340.60-2

3CP360.60-1

3CP380.60-1

3CP382.60-1

2. Series Digital I/O Modules (Directly Mixable with 3DI476.6)

Digital Input (DI)

3DI475.6: 16DI 24VDC, 12ms filter

3DI476.6: 16DI 24VDC, 1.2ms high-speed version

3DI477.6: 32DI

3DI486.6 / 3DI486.6-1: 32DI high-speed

Digital Output (DO)

3DO476.6: 16-channel transistor output 24VDC

3DO760.6: 8-channel relay output

Mixed DI+DO Module

3DM476.6: 8DI + 8DO, same hardware dimension (2 slots) as 3DI476.6

3. Analog Expansion Modules

3AI755.6: 8-channel analog input

3AO755.6: 8-channel analog output

3AM050.6 / 3AM051.6 / 3AM374.6: Mixed AI/AO modules

4. Communication / Interface Modules (aPCI slot, mounted on CPU)

3IF681.86: Ethernet + RS232

3IF686.9: POWERLINK

3IF761.9: Profibus-DP

3IF722.9: CAN + RS485

3IF672.9: CAN + RS232

5. Motion Control Modules (Servo & Encoder)

3NC150.6: Pulse positioning / encoder counter module

3EX350.9: Remote I/O expansion master (multi-rack expansion)

6. Key Matching Accessories

Plug-in spring-cage terminal block: Matching terminal assembly for 3DI476.6

0AC201.9: Backplane backup lithium battery (prevents data loss during power failure)

7. Quick Selection Comparison
8. 3DI475.6 vs 3DI476.6

Same channel quantity; the only difference lies in input filter time:

3DI475.6: 12ms (for general signals)

3DI476.6: 1.2ms (for high-speed counting & high-frequency proximity sensor signals)

2. Slot Occupancy: 3DI476.6 occupies 2 backplane slots, reserve sufficient slots when selecting backplanes.