Description
The IC670ALG310 is an 8-channel, isolated analog voltage-source output module belonging to the GE Fanuc Field Control distributed I/O platform (now managed under the Emerson automation catalog). This hardware converts digital data from a Bus Interface Unit (BIU) or Field Processor into isolated analog voltage signals ranging from -10.25 V to +10.25 V to drive field actuators, positioning valves, and variable speed drives.
Commercial Availability & Terms
- Condition: New Original (Factory Sealed Surplus) or Refurbished (Tested to OEM Specifications) available from legacy asset stock.
- Warranty: 12-Month Functional Warranty on all units.
- Lead Time: Normally ships within 1 to 2 business days from hardware inventory.
- Pricing Note: Price varies depending on market volume and product revision. Contact our technical sales desk for a formal, firm quotation.
Technical Specifications
The table below describes the electrical and physical parameters of the module based on documentation code GFK-1426.
| Parameter | Value |
| Manufacturer | GE Fanuc / Emerson |
| Model Number | IC670ALG310 |
| Platform Compatibility | Field Control Architecture / Series 90-30 / PACSystems RX7i |
| Number of Channels | 8 (Isolated, single-ended) |
| Output Ranges | \pm 10 V (Bipolar), 0 to 10 V (Unipolar) |
| Output Limits | -10.25 V to +10.25 V |
| Digital Resolution | 14 bits (approx. 0.6 mV per count) |
| External Power Input | 18 to 30 V DC (24 V DC Nominal) |
| Current Draw (Internal BIU) | 170 mA maximum |
| Current Draw (External Loop) | 275 mA maximum at 18 V DC (full load at -10 V) |
| Module Isolation | 1500 V AC peak for 1 minute / 250 V AC continuous |
| Minimum Load Impedance | \ge 5000\ \Omega |
| Maximum Load Capacitance | 1\ \muF |
| Typical Update Time | 1.5 ms |
| Module Accuracy | \pm 0.15\% of full scale at 25^\circC; \pm 0.25\% of full scale from 0 to 55^\circC |
| Operating Temperature | 0 to +55^\circC (+32 to +131^\circF) ambient |
Field Integration & Configuration Notes
1. Scaling Configuration via the BIU
The module processes commanded engineering values on a default span from -10,000 to +10,000 counts for the bipolar range. System scaling parameters are typically pushed over the backplane during network boot via a Hand-Held Programmer (HHP) or machine control configuration tool attached to the respective BIU module.
2. Wiring and Ground Loops
Each of the 8 channels shares a common field-side return, but the entire group is isolated from the main internal logic backplane up to 1500 V AC. For field runs near heavy induction equipment, you must use shielded twisted-pair cables. Ground the shield at the terminal block or chassis ground plate only—do not loop the shield back to the field actuator to avoid circulating ground currents.
3. Fail-Safe Actions
In the event of a local bus timeout or loss of communications from the host processor, the module can be configured via hardware configuration to execute one of two localized behaviors:
- Zero: Forces all 8 analog output channels to 0 V.
- Hold Last State: Retains the exact voltage output commanded just prior to the fault. This behavior requires steady external 24 V DC auxiliary power to remain functional.
System Constraint: A total load impedance drops below 5000\ \Omega per channel will cause the internal current limiting protection to sag the voltage loop output, introducing errors in process control delivery.
Frequently Asked Questions
Does the IC670ALG310 support standard 4–20 mA loop outputs?
No, the IC670ALG310 is purely a voltage-source output module (\pm 10 V or 0 to 10 V). For current loops, the companion current source module, model number IC670ALG320, must be sourced instead.
Can this module be hot-swapped onto the terminal base?
Field Control terminal bases allow for module replacement under power, but you must first disconnect external field power from the module terminal block arming screws to prevent sudden load transients or arc-flash hazards across the backplane edge connector.
What does a flashing module LED indicate?
A solid green LED indicates normal operational status with legitimate backplane communications. A flashing LED indicates a local hardware diagnostic failure, incorrect module alignment in the configuration profile, or a failure to finish calibration parameters upon power-up. Verify configuration profiles with the OEM manual before replacing hardware.
