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Product Introduction
The GE IC694MDL646 is a high-density DC Voltage Input Module designed for use with GE’s PACSystems RX3i programmable automation controllers (PACs). This module provides 32 input channels for monitoring 24V DC discrete signals from field devices such as limit switches, proximity sensors, pushbuttons, and more.
Engineered for reliability, modularity, and ease of integration, the IC694MDL646 is suitable for a wide range of industrial automation tasks where efficient, high-speed digital input acquisition is essential. The module is part of GE’s commitment to scalable, high-performance control platforms that deliver optimal process control, safety, and flexibility.
It connects seamlessly with the RX3i backplane and supports standard diagnostics, hot-swap capabilities, and extensive fault protection, making it a trusted component in manufacturing, energy, water treatment, and transportation sectors.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | GE (General Electric) |
| Product Line | PACSystems RX3i |
| Part Number | IC694MDL646 |
| Module Type | DC Voltage Input Module |
| Input Channels | 32 points |
| Input Type | Sourcing (Positive Logic) |
| Nominal Input Voltage | 24 VDC |
| Input Voltage Range | 0–30 VDC |
| Input Current | 6.5 mA @ 24 VDC per channel |
| Input Impedance | 3.5 kΩ nominal |
| Logic Levels | ON: >11 VDC, OFF: <5 VDC |
| Isolation | 250 VAC between field side and logic |
| Module Status LEDs | Yes (per group and fault) |
| Response Time | OFF to ON: <3 ms; ON to OFF: <3 ms |
| Hot Swappable | Yes |
| Backplane Compatibility | RX3i Universal Backplane |
| Operating Temperature | -40°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5% to 95%, non-condensing |
| Dimensions (H x W x D) | 34 x 145 x 140 mm |
| Weight | 0.258 kg |
| Certifications | UL, CE, CSA, RoHS, ATEX (when installed properly) |
Applications
The IC694MDL646 is a versatile module, suitable for numerous industrial applications where high-density digital input acquisition is required. It is especially useful in:
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Manufacturing Automation: Monitoring sensors, limit switches, and machine status inputs in automated assembly lines.
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Oil & Gas Facilities: Capturing field device statuses in hazardous environments with ATEX-certified systems.
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Water & Wastewater Treatment: Monitoring process inputs such as pump status, flow switch positions, and gate valve signals.
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Power Generation: Collecting signals from circuit breaker positions, relay statuses, and turbine-related sensors.
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Material Handling Systems: Interfacing with conveyor sensors, optical detectors, and emergency stop buttons.
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Transportation Systems: Signal monitoring for control systems in railway automation and traffic management.
Advantages
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High-Density Channel Count: 32 discrete inputs reduce system size and cost per I/O point.
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Fast and Reliable Input Capture: Response times under 3 milliseconds ensure accurate, real-time control.
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Enhanced Diagnostics: Built-in LED status indicators for quick field troubleshooting and maintenance.
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Hot-Swappable Design: Allows for module replacement without shutting down the system, increasing uptime.
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Backplane Integration: Fully compatible with the RX3i system, enabling seamless installation and scaling.
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Wide Input Voltage Tolerance: Accepts input voltages from 0–30 VDC, supporting a range of field devices.
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Isolation Protection: 250 VAC isolation safeguards against voltage surges and field-ground loops.
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Industrial Durability: Withstands harsh environments with extended temperature ranges and robust enclosure.
Frequently Asked Questions (FAQ)
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Q: How many inputs does the IC694MDL646 module support?
A: The module supports 32 discrete DC voltage input channels. -
Q: What is the recommended input voltage for reliable operation?
A: 24 VDC is the nominal voltage, though it supports a 0–30 VDC range. -
Q: Is the IC694MDL646 compatible with hot-swapping?
A: Yes, it can be hot-swapped during live operation without disrupting the system. -
Q: Does the module offer electrical isolation?
A: Yes, it provides 250 VAC isolation between field and logic sides. -
Q: What is the typical response time of the input channels?
A: Less than 3 milliseconds for both ON and OFF transitions. -
Q: Can this module be used in safety-critical applications?
A: Yes, when integrated within a certified control system, it supports ATEX and safety applications. -
Q: Are the input channels individually fused or protected?
A: The module has internal current-limiting features and input protection mechanisms. -
Q: What systems is this module compatible with?
A: It is specifically designed for the GE PACSystems RX3i control platform. -
Q: How are field wires connected to the module?
A: Through a terminal block mounted on the RX3i baseplate. -
Q: What kind of devices can be interfaced with this module?
A: Any sourcing-type 24VDC discrete device such as pushbuttons, limit switches, and proximity sensors.
Related or Compatible Models from the Same Series (RX3i / PACSystems)
| Model Number | Description | Type |
|---|---|---|
| IC694MDL645 | RX3i 32-Point DC Positive Logic Input Module | Digital Input |
| IC694MDL240 | RX3i 16-Point Relay Output Module | Relay Output |
| IC694MDL660 | RX3i 32-Point DC Negative Logic Input Module | Digital Input |
| IC694ALG442 | RX3i 8-Channel Analog Output Module | Analog Output |
| IC694ALG223 | RX3i 16-Bit Analog Input Module | Analog Input |
| IC694TBB032 | RX3i 32-Point Terminal Block | Terminal Block |
Popular Models from the Same Brand (GE / Emerson Automation)
| Model Number | Description | System Compatibility |
|---|---|---|
| IC695CPU320 | RX3i CPU with 20MB User Memory | PACSystems RX3i |
| IC695CHS012 | RX3i 12-Slot Universal Backplane | PACSystems RX3i |
| IC695PSA140 | RX3i Power Supply, 120/240VAC | PACSystems RX3i |
| IC695ALG600 | RX3i 4-Channel Analog Input Module | PACSystems RX3i |
| IC200MDL650 | VersaMax 32-Point DC Input Module | VersaMax I/O |
| IC693CPU374 | CPU with Ethernet, 240KB Logic Memory | Series 90-30 |
