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