Product Overview
The GE IC695ALG808 functions as a high-performance isolated analog output module for the PACSystem RX3i programmable automation controller platform. This module provides eight independently configurable channels for precise control of field devices requiring voltage or current signals. We engineered the IC695ALG808 to deliver accurate, isolated analog outputs for demanding industrial automation applications.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | GE Fanuc / Emerson Automation |
| Product Line | PACSystem RX3i |
| Part Number | IC695ALG808 |
| Series | PACSystem RX3i |
| Product Type | Isolated Analog Output Module |
| Number of Channels | 8 (individually isolated) |
| Output Signals (Voltage) | ±10 VDC, 0-10 VDC |
| Output Signals (Current) | 0-20 mA, 4-20 mA |
| Voltage Output Range | -10 to +10 VDC, 0 to +10 VDC |
| Current Output Range | 0-20 mA, 4-20 mA |
| Resolution (±10V) | 14 bits |
| Resolution (0-10V, 0-20mA, 4-20mA) | 15 bits |
| Data Format | IEEE 32-bit floating point; 16-bit integer in 32-bit field |
| Isolation Voltage | 2550 VDC for 1 second (field to backplane) |
| Maximum Output Load | 1350 Ohms (current output) |
| Update Rate | 8 milliseconds (all eight channels) |
| Output Settling Time | 2 milliseconds (0 to 95%, voltage or current) |
| Backplane Power (3.3V) | 360 mA maximum |
| Backplane Power (5V) | 17 mA maximum |
| External Power Supply | 19.2V to 30V DC (24V nominal) |
| External Current Draw | 160 mA typical |
| Power Dissipation | 7.25 Watts maximum (with 24V user supply) |
| HART Protocol | Not supported |
| LED Indicators | Module OK, channel active, fault |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Storage Temperature | -40°C to 85°C (-40°F to 185°F) |
| Humidity Range | 5% to 95% non-condensing |
| Dimensions (H x W x D) | 140 mm x 55 mm x 130 mm (approx.) |
| Weight | 0.69 lbs (0.31 kg) |
| Mounting | RX3i Universal Backplane |
| Certifications | CE, UL, CSA, RoHS |
Key Features and Benefits
Eight Isolated Output Channels: The IC695ALG808 provides eight independent analog outputs with channel-to-channel isolation. You therefore connect multiple field devices without concern for ground loops or interaction between channels.
Flexible Signal Configuration: Each channel individually configures for voltage or current output. Consequently, you mix signal types within the same module to match various field device requirements.
High-Resolution Outputs: With 14-bit resolution for ±10V range and 15-bit for other ranges, this module delivers precise control signals. You achieve smooth, accurate positioning of valves and actuators.
Rapid Update Rate: The module updates all eight channels every 8 milliseconds for fast process response. Therefore, you implement high-speed control loops with minimal delay.
High Isolation Voltage: With 2550 VDC isolation, this module protects the backplane from field-side faults. This robust isolation ensures reliable operation in electrically noisy industrial environments.
Detailed Functional Description
The primary function of the GE IC695ALG808 involves converting digital values from the RX3i CPU into precision analog signals for field devices. Specifically, it receives configuration and output data through the universal backplane. It then converts these digital values to voltage or current signals using high-resolution DACs. Each channel provides complete isolation from others and from the backplane, preventing ground loops. The module continuously updates outputs based on the latest data from the control program. Furthermore, it reports diagnostic information including open wire detection and out-of-range conditions.
Output Characteristics and Performance
We designed the IC695ALG808 with excellent analog performance for critical applications:
| Parameter | Voltage Output | Current Output |
|---|---|---|
| Output Ranges | ±10V, 0-10V | 0-20mA, 4-20mA |
| Resolution | 14 bits (±10V), 15 bits (0-10V) | 15 bits |
| Accuracy | ±0.1% of full scale | ±0.1% of full scale |
| Temperature Drift | ±50 ppm/°C | ±50 ppm/°C |
| Output Load | >2 kΩ | 0-1350 Ω |
| Settling Time | 2 ms to 95% | 2 ms to 95% |
| Protection | Short circuit | Open/short circuit |
Isolation and Protection
The GE IC695ALG808 incorporates extensive isolation and protection:
Channel-to-Backplane Isolation: 2550 VDC for 1 second
Channel-to-Channel Isolation: 2550 VDC for 1 second
Output Protection: Continuous short circuit protection on all channels
Open Wire Detection: Reports open circuit on current outputs
Transient Protection: Suppression on all field connections
Installation and Configuration
Engineers install the IC695ALG808 in any I/O slot of an RX3i universal backplane. The process involves:
Inserting the module into the backplane until fully seated
Securing with the locking mechanism
Connecting external 24 VDC power to the module terminals
Wiring field devices to the removable terminal block
Configuring channel types and ranges via programming software
Setting output defaults for fault conditions
The module stores configuration in non-volatile memory within the CPU.
Power Requirements
The IC695ALG808 requires both backplane power and external field power:
Backplane Power (3.3V): 360 mA maximum for module logic
Backplane Power (5V): 17 mA for internal circuits
External Power (User Supply): 19.2-30 VDC, 160 mA typical
Total Power Dissipation: 7.25 Watts maximum
The external supply powers the analog output drivers and must be connected for proper operation.
Mechanical Details
The GE IC695ALG808 features the standard RX3i form factor for easy installation. Its front panel provides:
Removable 20-pin terminal block for field wiring
Two-position terminal block for external power
LED indicators for module status and per-channel activity
Label area for channel identification
Locking latch for secure installation
The module includes shielding for electromagnetic compatibility in industrial environments.
Compatibility Information
The IC695ALG808 operates with all RX3i system components:
All RX3i CPU models
All RX3i universal backplanes
Requires external 24 VDC power supply
Compatible with Proficy Machine Edition programming software
Common Industrial Applications
The GE IC695ALG808 provides precision analog control across industries:
| Application Area | Typical Use Case |
|---|---|
| Process Control | Positioning control valves in chemical plants |
| Power Generation | Controlling turbine governor setpoints |
| Water Treatment | Adjusting chemical feed pump speeds |
| Manufacturing | Regulating web tension in converting lines |
| HVAC | Positioning air handling damper actuators |
| Material Handling | Controlling variable frequency drives |
Why Choose This Module?
Selecting the GE IC695ALG808 means choosing a high-performance isolated analog output solution for your RX3i system. You control up to eight devices from a single module, saving rack space and reducing system cost. Per-channel isolation eliminates ground loop problems common in large installations. The fast 8 ms update rate supports demanding control applications requiring quick response. With multiple signal ranges and high resolution, this module adapts to virtually any analog control requirement. For RX3i systems needing precision analog outputs, the IC695ALG808 delivers the performance and reliability you expect.
Details
| Weight | 0.1 kg |
|---|---|
| Dimensions | 25 × 108 × 127 mm |
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