The GE Fanuc IC695ALG708, also cataloged as the IC695ALG708 Analog Output Module, operates as a dedicated hardware component for multi-channel analog signal generation within PACSystem RX3i platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IC695ALG708 |
| Brand | GE Fanuc / Emerson |
| Origin | USA |
| Weight | 0.43 kg (0.94 lbs) |
| Dimensions | Standard RX3i single-slot module |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 375 mA at 3.3 VDC, 315 mA at 24 VDC (7.25 W max dissipation) |
| Number of Channels | 8 |
| Output Voltage Ranges | 0 to +10 VDC, -10 to +10 VDC |
| Output Current Ranges | 0-20 mA, 4-20 mA |
| Resolution | +/-10V: 15.9 bits, 0-10V: 14.9 bits, 0-20mA: 15.9 bits, 4-20mA: 15.6 bits |
| Calibrated Accuracy | +/-0.15% of full scale at 25 deg C, +/-0.25% at 60 deg C |
| Output Settling Time | 2 ms (0 to 95% voltage or current output) |
| Update Rate | 8 ms (all 8 channels) |
| Maximum Output Load | 850 ohms |
| External Power Supply | 19.2 to 30 VDC (24 VDC nominal) |
| Field-to-Backplane Isolation | 2550 VDC for 1 second |
Backplane Bus Communication Velocity & I/O Density Scaling
The IC695ALG708 interfaces with the PACSystem RX3i backplane bus to perform continuous 8-channel analog conversions with an approximate update rate of 8 ms across all outputs. High-density channel scaling allows independent output range assignment using IEEE 32-bit floating point or 16-bit integer formats in a 32-bit field. Internal firmware flash compatibility ensures synchronized cyclic data exchange with the host controller while field-to-backplane optical isolation preserves signal integrity against electrical ground loops.
Frequently Asked Questions
Q: What are the backplane current draw requirements for the IC695ALG708 module?
A: The module requires 375 mA at +3.3 VDC from the backplane bus along with 315 mA at +24 VDC from the isolated backplane power rail, resulting in a maximum power dissipation of 7.25 W.
Q: Does the IC695ALG708 analog output module support HART communication?
A: No, HART protocol communication is not supported on this specific module hardware.
Q: What is the maximum load resistance supported on the current output channels?
A: The current outputs support a maximum loop load resistance of 850 ohms when powered within the external voltage supply range of 19.2 to 30 VDC.
Field Installation Guidelines
- Turn off backplane power to the PACSystem RX3i rack prior to inserting or removing the IC695ALG708 module to avoid backplane connector strain.
- Verify that the module is fully seated in its baseplate slot and that top and bottom retention latches are locked.
- Route field output cables separately from high-voltage AC lines and inductive loads to minimize induced noise on analog signal paths.
- Ensure the external 24 VDC power supply connection complies with the 19.2 to 30 VDC operating range and that cable shields are grounded at a single chassis ground point.
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