IC694APU305 GE Fanuc High-Speed Counter | New & Original Stock
Manufacturer: GE Fanuc
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Part Number: IC694APU305
Condition：New with Original Package
Product Type: High-Speed Counter Modules
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
GE Fanuc IC694APU305 PACSystems RX3i Pulse I/O Processing Module
The GE Fanuc IC694APU305 serves as the primary IC694APU305 Pulse I/O Processing Module utilized to execute high-frequency pulse train data acquisition and high-speed counter tracking across PACSystems RX3i platforms. The hardware processes independent asynchronous input signals natively, executing real-time pulse conversion and pulse width calculations directly at the module boundary to insulate the main system CPU from high-velocity scan overhead.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IC694APU305 |
| Brand | GE Fanuc / Emerson |
| Origin | USA |
| Weight | 4.54 kg (10.00 lbs) |
| Dimensions | Standard PACSystems RX3i single-slot rack profile |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 5 VDC from backplane at 360 mA + (10 mA x number of active outputs) |
| System Compatibility | PACSystems RX3i Universal Backplane |
| Module Capacity | No architectural system limitation |
| Input Channel Count | 12 positive logic channels |
| Output Channel Count | 8 positive logic channels |
| Signal Isolation | 1500 V Peak (1 second), 30 V AC/V DC steady state |
| Input Selection | TTL (5 VDC) or Non-TTL (10-30 VDC) |
| Maximum Counter Rate | 30 kHz (Absolute), 200 kHz (A-Quad-B), 1 MHz (Enhanced mode) |
| Counter Bit Depth | 32-bit signed (-2,147,483,648 to +2,147,483,647) |
| Protection Matrix | 5 A (5 x 20 mm) common replaceable fuse |
Backplane Bus Communication Velocity and Deterministic Networks
The hardware interfaces directly with the RX3i parallel backplane bus to execute sub-millisecond register synchronization routines. Parallel logic pipelines inside the module handle the high-speed input filtration array down to 20 microseconds, bypassing internal backplane propagation delays. When routing pulse frequencies alongside 4-20 mA HART loop protocol wiring networks, the 1500 V physical isolation block dampens high-frequency common-mode offsets and electromagnetic cross-talk, preventing signal jitter or phase distortion within the A-Quad-B quadrature logic processing registers.
Frequently Asked Questions
Q: What are the backplane current constraints when driving all eight outputs simultaneously?
A: The baseline internal backplane draw at 5 VDC is 360 mA. For each faceplate output switched to an active ON state, an additional 10 mA must be added to the internal logic power calculation, yielding a maximum logic bus load of 440 mA.
Q: How does the module handle overcurrent occurrences across the positive logic output channels?
A: The module relies on a centralized, field-replaceable 5 A (5 x 20 mm) fast-acting fuse common to the output distribution block. An electrical short circuit on any of the eight positive logic outputs will open the fuse link, immediately isolating the field-side loop power without disrupting backplane operations.
Field Installation Guidelines
- Rack Mounting and Chassis Grounding: Slide the module into the universal RX3i backplane slot until the top and bottom structural hooks latch into the metal frame alignment slots. The backplane rail assembly must maintain an unpainted electrical bond to the plant copper instrument earth grid with a total path resistance under 1 Ohm.
- Signal Cable Separation and Routing: All high-frequency pulse inputs and quadrature encoder lines must use shielded twisted-pair cabling. Route these low-voltage signal lines inside independent wiring ducts segregated from high-voltage AC mains and variable frequency drive cables by a minimum distance of 300 mm.
- Shield Continuity and Grounding: Terminate the cable drain shield braids directly at the master instrument ground bus terminal inside the marshalling panel enclosure. Do not connect the cable shield at both the encoder housing and the PLC rack to eliminate the formation of high-frequency ground loop currents.