IC200MDL331 | GE Fanuc | VersaMax Analog Input Module

GE Fanuc IC200ALG261 VersaMax Analog Input Module — 8-Channel, 15-Bit, Differential Voltage

The IC200ALG261 is an 8-channel, 15-bit differential voltage analog input module from the GE Fanuc VersaMax series. It provides eight differential voltage inputs (-10V to +10V DC) with enhanced common-mode noise rejection, making it ideal for precision process monitoring in electrically noisy industrial environments. The module is backplane-powered and requires no external power supply.

Key Specifications

• Manufacturer: GE Fanuc / Emerson
• Series: VersaMax
• Type: Analog Input Module
• Channels: 8 differential, one group
• Resolution: 15-bit (0.3125 mV = 1 count)
• Input Range: -10V to +10V DC (differential and common mode)
• Input Impedance: 100 kΩ minimum
• Update Rate: 7.5 ms per module
• Common Mode Rejection: 70 dB minimum
• Accuracy (25°C): ±0.3% typical, ±0.5% max of full scale
• Accuracy (0–60°C): ±1% max of full scale
• Backplane Current: 200 mA max from +5V bus
• External Power: Not required (backplane powered)
• Isolation: 250 VAC continuous; 1500 VAC for 1 minute
• LED Indicators: OK (green when configured & recognized)
• Dimensions: 110 mm W × 66.8 mm H × 50 mm D
• Weight: ~0.22 lb (~0.1 kg)

Diagnostics

• Loss of Internal Power: Reported for field-side circuits
• RF Interference: Severe RF (IEC 1000-4-3, 10V/m) may degrade accuracy to ±1%

Compatibility

• PLC CPU firmware 2.1 or later
• VersaPro software 2.0 or later
• Ethernet NIU EBI001 firmware 1.10 or later
• DeviceNet, Profibus, Genius NIU: Planned for future release

Installation Guide

1. Mount on compatible VersaMax I/O carrier (IC200CHSxxx series).
2. Wire 8 differential voltage inputs using shielded twisted-pair cable.
3. Ground shield at the source device if possible; otherwise ground at the I/O module.
4. Provide external power for input transceivers — module does not power field devices.
5. Power on and verify OK LED illuminates green.

FAQ

Q: Is IC200ALG261 15-bit or 16-bit?
A: 15-bit per official GE Fanuc manual GFK-2526. Some third-party sources list 16-bit; always verify with official documentation.

Q: Does it support current signals (4–20 mA)?
A: No. IC200ALG261 is voltage-only (-10V to +10V). For current input, use IC200ALG262 (8-channel differential current).

Q: Does it need external power?
A: The module itself is backplane-powered (200 mA @ 5V). However, external power must be supplied to input transceivers separately.

Q: What is the common mode voltage range?
A: -10V to +10V DC, matching the differential input range.

Q: Is it suitable for high-noise environments?
A: Yes. The differential input structure provides 70 dB common-mode rejection. Use shielded twisted-pair cables for best performance.

Selection Tips

• 8-channel differential voltage (15-bit): IC200ALG261
• 8-channel differential current (15-bit): IC200ALG262
• 15-channel voltage (non-differential): IC200ALG263
• 15-channel current (non-differential): IC200ALG264
• 4-channel 12-bit voltage/current: IC200ALG230
• 8-channel 16-bit isolated voltage/current: IC200ALG240
• Always verify: Voltage vs. current, differential vs. single-ended, resolution requirement