Description
Product Introduction
The GE Fanuc IC660BBD020 is a 16-point configurable discrete I/O block designed for the legacy GE Genius I/O distributed architecture. Operating on 24/48 VDC power, this “Smart Block” integrates signal processing, field terminal connections, network communication interface, and electronic overload protection into a standalone enclosure.
Unlike traditional slice I/O modules, the IC660BBD020 handles field signal conversion locally while reporting advanced diagnostic alerts (such as open wire detection, short circuits, and failed switches) directly over the Genius Bus to Series 90-30, Series 90-70, or PACSystems RX3i controllers. Its sourcing configuration delivers positive voltage directly to field loads when energized.
Key Technical Specifications
| Parameter | Specification |
| Manufacturer | GE Fanuc / Emerson |
| Part Number | IC660BBD020 |
| Product Sub-Components | Terminal Assembly: IC660TSD020 | Electronics: IC660EBD020 |
| Nominal Voltage | 24 VDC / 48 VDC (Operating Range: 18 to 56 VDC) |
| Number of Points | 16 configurable channels (Input, Output, or Tristate) |
| Output Type | Sourcing (DC Positive) Solid-State Switches |
| Output Current Rating | 2.0 Amps max per point (15.0 Amps max per block) |
| Inrush Current | 10 Amps peak for 10 ms |
| Network Bus Speed | 153.6 kbps, 76.8 kbps, 38.4 kbps, or 19.2 kbps |
| Diagnostic Features | Overload, Short Circuit, Open Load, No Load, Overtemperature |
Application Scenarios & The “Trench” Experience
It’s 4:00 AM on a critical manufacturing line running an older Series 90-70 system. A solenoid valve coil short-circuits due to moisture ingress, threatening to damage the entire PLC control rack. Instead of blowing a main panel fuse or damaging the output driver board, the IC660BBD020 instantaneously isolates the faulted channel, triggers an electronic shutdown on point 4 only, and transmits a precise “Short Circuit – Point 4” message across the Genius bus highway. The rest of the 15 circuits on the block continue operating without interruption.
Primary Industrial Applications
- Automotive Body & Assembly Lines – Robot Cell Interlocks – Drives 24V solenoids and reads proximity switches in heavy welding environments.
- Material Handling & Warehousing – High-Speed Conveyor Sorting – Controls high-current motor starters and photo-eye sensor arrays across distributed plant floors.
- Mining & Heavy Processing – Crusher Plant Telemetry – Provides fault-tolerant field I/O in high-vibration, electrically noisy outdoor installations.
- Paper & Pulp Mills – Roll Handling Hydraulic Skids – Controls high-duty-cycle directional valves using 48 VDC sourcing current.
Field Case Study
A steel tube mill in Ohio experienced recurring false trippings on a flying cutoff saw controlled by a legacy IC660BBD020 block. Maintenance personnel attached a Handheld Monitor (IC660HHM501) directly to the block’s serial port. The HHM immediately pinpointed a broken neutral return line on circuit 11 that was generating intermittent “No Load” alarms. The wire was repaired in 10 minutes, saving the facility an estimated $45,000 in diagnostic downtime.
IC660BBD020
IC660BBD020
Transparency SOP: Quality Assurance & Testing
Every IC660BBD020 block undergoes testing on live Genius network test rigs:
- Terminal Assembly & Pin Audit: Inspected for bent backplane pins, cracked terminal strip barriers, degraded potting material, and stripped terminal screws on the IC660TSD020 base.
- Electronics Assembly Snap-In Check: Verification that the IC660EBD020 electronics module seats securely onto the terminal base with perfect spring-contact engagement.
- Full 16-Channel Load Test: Each channel is configured independently as input and output, driving 2A resistive/inductive loads to confirm solid-state switch switching and current capacity.
- Diagnostic Fault Simulation: Intentionally generating short-circuit and open-load conditions on test channels to verify that built-in protection trips correctly and transmits exact fault codes over the network.
- Genius Bus Network Loop Check: Running 24-hour continuous communication polling at 153.6 kbps on a test loop to confirm zero packet loss or memory drift.
The Veteran’s Tech Trap Guide (Crucial Value-Add)
⚠️ Trap 1: Check Electronics vs. Terminal Base Compatibility!
The complete block consists of two physical parts: the IC660TSD020 terminal assembly base and the IC660EBD020 electronics module. If you are swapping out an old unit, ensure you do not mix up terminal bases from AC Genius blocks with DC blocks—putting a DC electronics module on an AC terminal base will damage the connector contacts!
❗ Trap 2: Mind the Sourcing Wiring Topology.
The is a sourcing block (DC+ is switched out to the load). The common side of your field solenoids or indicator lights MUST be tied to DC negative (DC-). Wiring a sinking device (switching to ground) to a sourcing block channel will result in a dead circuit and instant overload faults.
⚠️ Trap 3: Respect Maximum Block Current Limits.
While each individual point is rated for up to 2.0 Amps, the entire 16-point block has a maximum combined current ceiling of 15.0 Amps. Energizing all 16 channels simultaneously at 1.5 Amps (24A total) will trip the thermal shutdown on the block even if no individual channel exceeds its 2A limit.
❗ Trap 4: Hot-Swapping Electronics Cards Requires Care.
You can remove and replace the upper electronics module (IC660EBD020) while field power is applied to the terminal base, BUT you must disengage the unit’s latching screw completely before pulling it straight up. Angling the module during removal can short adjacent connector pins.
Frequently Asked Questions (FAQ for Conversion)
Q: Can I use a GE Handheld Monitor (IC660HHM501) directly on the ?
A: Yes. The front face of the module features a dedicated 3-pin serial monitor port. Plugging in a Handheld Monitor allows you to configure baud rates, force points, read diagnostic fault tables, and assign Serial Bus Addresses (SBA) without needing PLC software.
Q: What is the difference between and IC660BBD025?
A: The is a 24/48 VDC Sourcing block (switches DC positive), whereas the IC660BBD025 is a Sinking block (switches DC negative / ground).
Q: Can individual points on the be set as inputs while others act as outputs?
A: Yes. Each of the 16 channels can be configured independently via software or the Handheld Monitor to operate as a discrete input, discrete output, or tristate circuit.
Q: Why source pre-tested surplus blocks over upgrading the whole rack?
A: Genius I/O blocks are wired directly in the field. Replacing a Genius block with a new I/O platform requires migrating network gateways, running new field cables, and re-writing PLC program blocks. Dropping in a pre-tested replacement restores full operation in minutes.
Q: What warranty coverage is provided with this module?
A: Every block comes with a full 12-month functional replacement warranty. If any channel, network port, or diagnostic function fails under normal operating conditions within 1 year, we replace it immediately.
Start Chat
