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Configured for translating universal backplane levels to serial signal levels in expansion architectures, the GE Fanuc IC695LRE001 (IC695LRE001 Serial Bus Transmitter) provides direct physical/electrical execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IC695LRE001 |
| Brand | GE Fanuc Emerson |
| Origin | United States |
| Weight | 0.31 lbs (0.14 kg) |
| Dimensions | Single-Slot RX3i Form Factor |
| Operating Temp | 0 - 60 deg C |
| Power Consumption | 132 mA at 5 VDC / 0 mA at 3.3 VDC |
| Module Type | Serial Bus Transmitter |
| Effective Data Rate | 500 kbps |
| Isolation Type | Non-isolated differential communications |
| Local Cable Limit | 50 ft |
| Remote Cable Limit | 700 ft |
| Diagnostic Interface | 2 LED Indicators (Expansion OK, Expansion Active) |
Deterministic Inter-Backplane Scaling and Signal Profiles
The transmitter drives high-speed differential signals to bridge data from the RX3i universal chassis to remote or expansion racks. Because it lacks galvanic isolation, the physical layer utilizes tightly managed non-isolated differential signaling to maintain deterministic backplane bus communication velocity across extended line lengths. Signal propagation latencies remain constant to ensure that remote I/O processing times correspond directly with the main CPU execution cycle.
Frequently Asked Questions
Q: What are the consequences of removing the IC695LRE001 transmitter while the backplane is energized?
A: This module does not support hot-swap capabilities. Removing the unit under power will disrupt the differential bus continuity, causing an immediate remote drop loss error and forcing all downstream I/O modules into their pre-configured fail-safe or hold-last-state conditions.
Q: Why does the "Expansion Active" LED remain completely dark despite the "Expansion OK" LED being illuminated?
A: The "Expansion OK" LED indicates that the local 5 VDC rail is within proper threshold bounds. A dark "Expansion Active" LED indicates that while the module is powered, there is no active serial packet transmission or polling occurring between the local universal backplane and the remote expansion racks.
Field Installation Guidelines
- Chassis Positioning: The module must be seated exclusively into the dedicated expansion connector interface located on the far right-hand side of the RX3i universal backplane frame.
- Cable Strain Relief: Mechanical constraints require that expansion cables longer than 15 feet use external support fixtures to prevent structural stress from damaging the front-facing connector assembly.
- Grounding Requirements: Because the communication interface uses non-isolated differential logic, all interconnected remote expansion racks must share a common functional grounding plane to prevent common-mode voltage damage.
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