Product Overview
When precise analog control is required in industrial automation, the GE Fanuc IC694ALG392 delivers reliable performance. This PACSystem RX3i module provides eight single-ended analog output channels, supporting both voltage and current signals for versatile actuator control.
Technical Specifications Breakdown
The IC694ALG392 offers selectable output ranges to match application needs. Key parameters include:
- Output Channels: 1 to 8 selectable, single-ended outputs
- Output Current Range: 4 to 20 mA and 0 to 20 mA
- Output Voltage Range: 0 to 10V and -10 V to +10V
- Update Rate: 8 milliseconds
- Resolution: 4 to 20mA: 0.5 µA (1 LSB = 0.5 µA); 0 to 20mA: 0.625 µA (1 LSB = 0.625 µA); 0 to 10V: 0.3125 mV (1 LSB = 0.3125 mV); -10 to +10V: 0.3125 mV (1 LSB = 0.3125 mV)
- Absolute Accuracy (Voltage mode): +/-0.25% of full scale @ 25°C (77°F), typical; +/-0.5% of full scale @ 25°C (77°F), maximum; +/-1.0% of full scale over operating temperature range (maximum)
- Power Consumption: 110 mA from +5 VDC PLC backplane supply; 315 mA from +24 VDC user supply
- External Supply Voltage Range: 20 VDC to 30 VDC
- External Power Supply Voltage Ripple: 10% (maximum)
Factory calibration ensures accuracy: .625 µA for 0 to 20 mA; 0.5 µA for 4 to 20 mA; and .3125 mV for voltage (per count).
Industry Applications
This module excels in analog control loops requiring modulating control beyond simple on/off operations. Common applications include:
- Process Control: Interface with PID controllers for automatic regulation of valves, motors, pistons, and agitators.
- Signal Retransmission: Re-transmit signals to data loggers, measuring instruments, totalizers, converters, isolators, and other compatible devices.
- Manual Control: Support manual mode via hardwired or software-based loaders.
Installation & Setup Guidance
Install the IC694ALG392 into any available slot of an RX3i PACSystem rack. The module requires an external power supply between 20 and 30 VDC (ideally 24 VDC). When connected to a GE Fanuc Series 90-30 or 90-70 PLC, the module draws power from the PLC backplane (+5 VDC) and an external user supply (+24 VDC). Ensure the external power supply ripple does not exceed 10%.
Maintenance & Reliability
The module includes internal fault detection for current mode, such as open wire fault detection. This feature helps operators monitor which channel has loose wiring or a completely open or removed wire. Faults are visible in the CPU diagnostics. The module supports holding the last known value upon interruption of system power, preventing unwanted system behavior. Alternatively, values may reset to zero based on configuration.
Compatibility & Integration
The IC694ALG392 is compatible with:
- PACSystem RX3i (native platform)
- Series 90-30 PLCs
- Series 90-70 PLCs
- Compatible Actuators: Valves, motors, pistons, and agitators
Selection Guide & Purchasing Advice
Before purchasing the IC694ALG392, verify compatibility with your existing RX3i or Series 90-30/90-70 system. Confirm the external power supply meets the 20-30 VDC range and can deliver sufficient current (315 mA from +24 VDC user supply). Contact SpareTechPLC for current availability and lifecycle status.
Troubleshooting & Common Issues
- Open Wire Fault: In current mode, the module detects open wires. Check wiring and connections for each channel.
- Power Supply Issues: Ensure external supply voltage is within 20-30 VDC and ripple is below 10%.
- Incorrect Output: Verify channel configuration for resolution (15 or 16-bit) and output range. Recalibration may be required if accuracy drifts.
Comparison with Similar Modules
| Feature | IC694ALG392 | Typical 8-Channel Analog Output Module |
|---------|-------------|----------------------------------------|
| Channels | 1 to 8 selectable, single-ended | Often fixed 8 channels |
| Voltage Output | 0 to 10V and -10 to +10V | Common ranges |
| Current Output | 4 to 20 mA and 0 to 20 mA | Typically 4-20 mA only |
| Update Rate | 8 milliseconds | Varies (10-20 ms typical) |
| Resolution | 15 or 16-bit (configurable) | Often 12-16 bit |
| Fault Detection | Open wire in current mode | Not always included |
Frequently Asked Questions
Q1: What is the update rate of the IC694ALG392?
A1: The update rate is 8 milliseconds for all eight output channels.
Q2: Can the IC694ALG392 be used with Series 90-30 PLCs?
A2: Yes, the module supports Series 90-30 PLCs and Series 90-70 PLCs.
Q3: What voltage outputs are available?
A3: The module provides 0 to 10V (unipolar) and -10 to +10V (bipolar) voltage outputs.
Q4: How is open wire fault detected?
A4: In current mode, the module detects open wires and reports the fault in CPU diagnostics.
Q5: What is the power consumption of the IC694ALG392?
A5: It consumes 110 mA from +5 VDC PLC backplane supply and 315 mA from +24 VDC user supply.
