Description

The Allen-Bradley 1794-IR8 RTD input module has 8 input channels which can be used for industrial applications. This Allen-Bradley 1794-IR8 RTD input module can be used with a modular and small FLEX I/O systems for distributed applications to achieve the rack-based I/O functions. This Allen-Bradley 1794-IR8 RTD input module can operate at a temperature range of 0 degrees to 55 degrees Celsius (32 degrees to 131 degrees Fahrenheit).

• System Throughput: Normal Mode: Programmable from 28ms/channel to 325ms/channel 325ms (1 channel scanned) 2.6s (8 channels scanned) – default
• Enhanced Mode: Programmable from 56ms/channel to 650ms/channel 650ms (1 channel scanned) – default 2.925s (8 channels scanned)
• Data Format: 16-bit 2’s complement or offset binary (unipolar)
• Accuracy: Without calibration, at low humidity: Normal mode: 0.05% full scale (max) Enh. mode: 0.01% full scale (typical)
• RTD Excitation Current: 718.36?A
• Sensors supported: 100 ? Pt ? = 0.00385 Euro (-200…+870 °C) 100 ? Pt ? = 0.003916 U.S. (-200…+630 °C) 200 ? Pt ? = 0.00385 Euro (- 200…+630 °C) 500 ? Pt ? = 0.00385 U.S. (-200…+630 °C) 100 ? Nickel ? = 0.00618 (-60…+250 °C) 120 ? Nickel ? = 0.00672 (-60…+250 °C) 200 ? Nickel ? = 0.00618 (-60…+250 °C) 500 ? Nickel ? = 0.00618 (-60…+250 °C) 10 ? Copper ? = 0.00427 (- 200…+260 °C).
• Terminal base: 1794-TB2, 1794-TB3 and 1794-TB3T
• Number of Inputs: 8
• Product Description: Flex IO 8-Channel RTD Input Module
• Mounting: DIN Rail
• Wire Size: Determined by installed terminal base
• Operating Temperature: 0 to 55 C (32 to 131 F)
• Storage Temperature: –40…85 °C (–40…185 °F)
• Resolution: 16 bits across 435 ohms
• Vibration: 5g @ 10 to 500 Hz
• Operating Shock: 30 g
• Part Number/Catalog: No. 1794-IR8
• Product Type: Flex I/O RTD Module
• Inputs: 8 Channels
• Nominal Input Ranges: 1 to 433 ohms
• Isolation Voltage: 850 Volts DC
• Normal Mode Noise Rejection: -60 DB at 60 Hertz
• Channel Bandwidth: 0 to 2.62 Hertz
• Normal Mode System Throughput: 325 milliseconds
• Flexbus Current: 20mA
• Power Dissipation: 3 Watts at 31.2 Volts DC maximum
• Thermal Dissipation: 10.2 BTU/hour at 31.2 Volts DC maximum

The Allen-Bradley 1794-IR8 RTD input module provides 8 input channels, each supporting an input voltage rating of 24 volts DC and an input current rating of 140 milliamperes. The Allen-Bradley 1794-IR8 RTD input module can be used for industrial applications. This Allen-Bradley 1794-IR8 RTD input module can be used with modular and small FLEX I/O systems for distributed applications to achieve the rack-based I/O functions. The Allen-Bradley 1794-IR8 RTD input module includes one status LED indicator that has three states and is automatically on once this Allen-Bradley 1794-IR8 RTD input module is supplied with electrical power. The Allen-Bradley 1794-IR8 RTD input module supports signal input impedance from 1 ohm to 433 ohms with a resolution of 16 bits.

The Allen-Bradley 1794-IR8 RTD input module is used as an RTD/resistance measurement module. The Allen-Bradley 1794-IR8 RTD input module can be connected to an RTD for temperature measurement with different resistance values. The Allen-Bradley 1794-IR8 RTD input module typically draws 140 milliamps at a voltage of 24 volts DC. The Allen-Bradley 1794-IR8 RTD input module supports 100, 200 and 500 ohms for platinum, 100, 120, 200 and 500 ohms for nickel and 10 ohms for copper. This Allen-Bradley 1794-IR8 RTD input module dissipates an electrical power of 3 watts and a maximum heat of 10.2 British Thermal Units per hour. The Allen-Bradley 1794-IR8 RTD input module is intended for use in a mainly industrial environment that is clean and dry and nonhazardous locations. This Allen-Bradley 1794-IR8 RTD input module can operate at a temperature range of 0 degrees to 55 degrees Celsius (32 degrees to 131 degrees Fahrenheit).