Description
The Emerson / GE Fanuc VersaMax IC200ALG320 is a 4-channel, 12-bit resolution analog output module designed to drive current and voltage field devices. Operating directly on the VersaMax I/O backplane, this module provides four independently configurable channels that can output either 0 to 10 V DC, -10 to +10 V DC, 4 to 20 mA, or 0 to 20 mA signals. It is primarily used to control proportional valves, variable frequency drives (VFDs), strip chart recorders, and other analog actuators.
Technical Specifications
| Parameter | Specification / Value |
| Brand / Manufacturer | Emerson Automation Solutions (Formerly GE Fanuc) |
| Model Number | IC200ALG320 |
| Product Line | VersaMax I/O System |
| Number of Channels | 4 analog output channels |
| Output Resolution | 12 bits (Unipolar: 4,095 counts; Bipolar: 4,095 counts over \pm10 V range) |
| Output Signal Ranges | Current: 4 to 20 mA, 0 to 20 mA
Voltage: 0 to 10 V DC, -10 to +10 V DC |
| Maximum Load Impedance | Current Mode: 0 to 850 \Omega at 24 V DC loop power
Voltage Mode: 2,000 \Omega minimum |
| Update Rate | ~4 ms for all 4 channels |
| Base Accuracy (at 25 °C) | Current Mode: \pm0.3% of full scale
Voltage Mode: \pm0.2% of full scale |
| External Power Requirement | 24 V DC (+20%, -15%), typical 120 mA required |
| Backplane Current Draw | 45 mA maximum from 5 V DC bus |
| Isolation Standards | 250 V AC continuous / 1500 V AC for 60 seconds (field-to-logic) |
Field Reliability & Integration Constraints
When commissioning the IC200ALG320 in active process loops, specific electrical and software variables must be addressed to ensure loop stability and avoid channel damage:
- External Power Dependency: Unlike some input modules that draw full excitation from the backplane, the IC200ALG320 requires a continuous, stable external 24 V DC power supply connected directly to the carrier terminals to drive the analog output loops. If this external 24 V supply drops or experiences significant noise, the outputs will default or drop out, even if the CPU remains healthy.
- Loop Resistance and Inductance: When using current outputs (4 to 20 mA), keep total loop resistance below 850 \Omega. Exceeding this limit will saturate the internal drive transistor, clipping the output signal below 20 mA. For highly inductive loads (e.g., long runs to large proportional valves), utilize shielded twisted-pair wire to mitigate inductive spike feedbacks during swift signal transitions.
- Hold Last State Behavior: Configure the module’s reaction to a loss of CPU communication or a CPU transition to “STOP” mode within the hardware configuration. You must decide whether each channel should hold its last valid output value or force a safe state (e.g., 0 V or 4 mA) to prevent unpredicted field device behavior during a control network interruption.
Supply Chain & Commercial Terms
Commercial Availability Notice
- Product Condition: New Original (Factory Sealed Surplus or Current Production) / Refurbished (Tested & certified)
- Warranty Period: 12-month comprehensive warranty from the date of shipment
- Lead Time: Ships within 1 to 2 business days from active stock availability
- Pricing Structure: Listed prices are indicative and subject to current global market material costs. Contact our sales engineering team for a formal, firm quotation.
Frequently Asked Questions
Can I output a current signal on Channel 1 and a voltage signal on Channel 2?
Yes. Every channel on the IC200ALG320 is independently software-configured. You can freely mix current (e.g., 4 to 20 mA) and voltage (e.g., -10 to +10 V) configurations across the four available terminals based on your application needs.
What happens if an output loop experiences a short circuit or an open circuit?
In voltage mode, a short circuit will cause the internal current limiting circuitry to activate to protect the module, though prolonged shorts can cause thermal stress. The module provides diagnostic bits to the CPU fault table to alert the control program of a power failure or configuration error, but it does not feature individual open-loop detection for current loops.
Can this module be hot-swapped while the VersaMax rack is powered?
If the module is mounted on an appropriate hot-swappable carrier (such as the IC200CHS002 or similar compatible box/spring style), the module mechanism itself can be removed and replaced while the backplane is powered. However, the external 24 V DC loop power must be turned off or disconnected locally to prevent field wiring arcs or unintended actuator movement during the swap.
