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The GE IC695ALG808, also cataloged as the IC695ALG808 Isolated Analog Output Module, operates as a dedicated hardware component for multi-channel analog signal generation and loop control execution within PACSystem RX3i platforms.

Hardware Specifications

Parameter Specification
Model IC695ALG808
Brand GE Fanuc Emerson
Origin USA / Global Manufacturing
Weight 0.31 kg (0.69 lbs)
Dimensions Single-Slot PACSystem RX3i Module Form Factor
Operating Temp 0 to 60 deg C
Power Consumption 360 mA max at 3.3 VDC, 17 mA at 5.0 VDC (Backplane); 7.25 W max dissipation
Series PACSystem RX3i
Product Type Analog Output Modules
Output Channels 8 individually isolated channels
Voltage Output Ranges 0 to +10 VDC, -10 to +10 VDC
Current Output Ranges 0-20 mA, 4-20 mA
Output Resolution 15-bit (+/-10 VDC, 0-20 mA, 4-20 mA); 14-bit (0-10 VDC)
Analog Update Rate 8 ms across all eight channels
Output Settling Time 2 ms (0 to 95% full scale)
Calibrated Accuracy +/-0.15% of full scale at 25 deg C; +/-0.25% of full scale at 60 deg C
Maximum Output Load 1350 Ohms
External Power Requirement 19.2 to 30 VDC (24 VDC nominal), 160 mA external current
Isolation Voltage 2550 VDC field-to-backplane for 1 second
Data Formats 32-bit IEEE floating point; 16-bit integer in a 32-bit field
Compatible Terminal Blocks IC694TBB032, IC694TBB132, IC694TBS032, IC694TBS132

Backplane Bus Communication Velocity and System Integration

The IC695ALG808 processes digital logic values converted into analog output signals over the RX3i PCI backplane bus, ensuring synchronized update rates across high-density systems. High-speed backplane bus communication velocity allows all eight channel values to update within an approximate 8 ms cycle time using 32-bit IEEE floating-point or 16-bit integer data formats.

Individual channel-to-channel isolation and 2550 VDC field-to-backplane isolation prevent earth loop currents from corrupting output loop accuracy. Firmware flash compatibility supports remote software configuration of output bias, upper/lower alarm limits, and fault reporting behaviors, providing high I/O density scaling across complex process control topologies.

Frequently Asked Questions

Q: Is an external power supply required to operate the IC695ALG808 analog output channels?

A: Yes. The module requires a nominal 24 VDC (19.2 to 30 VDC range) external supply connected directly to the terminal block to drive the output loops.

Q: What output data formats are supported by the IC695ALG808 configuration software?

A: The module supports 32-bit IEEE single-precision floating point numbers as well as 16-bit signed integers placed within a 32-bit field.

Q: What is the channel isolation rating for the IC695ALG808?

A: The module provides 2550 VDC optical isolation between field-side connections and the RX3i backplane bus.

Field Installation Guidelines

  • Verify that system backplane power and external 24 VDC power sources are fully disconnected prior to inserting or removing the module from the rack.
  • Securely wire external 24 VDC field supply connections to the designated terminal block pins (IC694TBB032, IC694TBB132, IC694TBS032, or IC694TBS132) before energizing.
  • Use shielded twisted-pair conductors for all voltage and current output wiring, grounding the cable shield at one point only to avoid ground loops.
  • Ensure external load resistance on current loop channels does not exceed the maximum rating of 1350 Ohms.
  • Maintain unobstructed air circulation around the rack enclosure to keep ambient temperatures within the specified 0 to 60 deg C operating window.

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