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Configured for high-precision temperature measurement and resistance signal conversion in VersaMax system platforms, the GE Fanuc IC200ALG620 (IC200ALG620 Analog Input Module) provides direct physical/electrical execution. The module accommodates 4 RTD/resistance input channels utilizing dedicated 16-bit Analog-to-Digital Converters (ADCs) per channel to interface 3-wire and 4-wire RTD sensors or direct resistance ranges.

Hardware Specifications

Parameter Specification
Model IC200ALG620
Brand GE Fanuc
Origin USA
Weight 0.88 lbs (0.40 kg)
Dimensions Single-slot VersaMax module footprint
Operating Temp 0 deg C to 60 deg C
Power Consumption 125 mA max at 5 VDC bus; 125 mA at 3.3 VDC bus
Input Channels 4-point RTD / Resistance input channels
Resolution 16 bits (15 bits plus sign)
Compatible RTD Types Platinum (25, 100, 1000 ohm); Copper (10, 50, 100 ohm); Nickel (100, 120 ohm); Nickel/Iron (604 ohm)
Resistance Input Ranges 0-500 Ohms; 0-3000 Ohms
Wiring Configurations 3-wire and 4-wire RTDs
Maximum Lead Resistance 5 Ohms per lead
Channel Update Rate 210 ms at 60 Hz; 230 ms at 50 Hz
Measurement Accuracy +/-0.15% on resistance; +/-0.15% on RTD temperature (at 25 deg C)
Temperature Sensitivity +/-0.004% of reading; +/-1.5 uV per deg C (referred to input)
Isolation 250 VAC (input to logic), 1500 VAC for 1 minute (input to frame)
Status Indicators FLD PWR LED, OK LED

Backplane Bus Communication Velocity & Firmware Flash Compatibility

The module executes internal data transfers over the VersaMax 5 VDC and 3.3 VDC logic backplane bus, drawing up to 125 mA from both supply rails. Digital conversion values are generated at a channel update rate of 210 ms at 60 Hz filter frequency or 230 ms at 50 Hz filter frequency. Onboard diagnostic firmware continuously reports channel-level conditions—including Open RTD, input short, underrange, overrange, non-volatile memory storage fault, wiring fault, and high/low alarms—directly to the host CPU controller. Front panel LED indicators signal module boot cycles, firmware updates, normal operation, and fault states.

Frequently Asked Questions

Q: What RTD wiring configurations are supported by the IC200ALG620?

A: The module directly supports both 3-wire and 4-wire RTD sensor wiring arrangements with a maximum allowable lead resistance of 5 Ohms per lead.

Q: How does the OK LED report operational and diagnostic states?

A: A solid green OK LED indicates normal backplane power and operation, flashing green indicates firmware update or boot mode, and solid amber indicates an active module diagnostic error.

Q: What are the backplane current draw demands for this module?

A: The module draws a maximum of 125 mA at 5 VDC output and 125 mA at 3.3 VDC output from the system backplane.

Field Installation Guidelines

  1. Mount the module firmly into its designated VersaMax carrier slot prior to connecting sensor field wiring.
  2. Ensure system backplane power is off before seating or removing the module.
  3. Route 3-wire or 4-wire RTD field cables using twisted, shielded wiring to minimize external electromagnetic interference.
  4. Maintain lead balance across RTD connections and confirm lead resistance does not exceed 5 Ohms per lead.
  5. Ground signal cable shields to the cabinet ground bar or carrier shield connection.

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