Q448 Input Signal Isolator

Brand: Eurotherm
Does not ship to United States

The Q448 is a DIN rail mount, DC powered bridge or strain gauge input signal conditioner with 1,800 Vdc isolation between input, output and power.

The input can be set via DIP switches for any one of 11 V ranges from 10 to ±200 mV.

The output is linear to the input and can be set for either 0 to 5 V, 0 to 10 V, 0 to 1 mA or 4-20 mA, direct or reverse acting.
Features
  • Adjustable bridge excitation
  • Field configurable input ranges
  • Field configurable output ranges
  • TouchCAL technology
  • High density DIN rail mounting
  • Flexible DC power supply accepts 18 to 30 Vdc
  • SnapLoc plug-in terminals

Specifications

Brand

Accuracy

  • ± 0.1 % Typical
  • ± 0.2 % Maixmum of Selected Input Range at 25° C (77° F)

Applications

  • SCADA Systems

Approvals & Certifications

  • CSA C22.2 No. 0-M91 & 142-M1987 (File No. LR42272-84)
  • UL (C,US)
  • UL 508 (File No. E99775)

Consumption

  • Power Consumption: 2.7 W Typical (One 350 ohms Bridge)
  • Power Consumption: 4 W, Max.

Display

  • Green LED

Electrical Connectors

  • Plug-In Terminal
  • Wire Termination: Screw Terminals for 12 to 22 AWG

Electrical Contacts

  • Normally Closed

Electrical Rating

  • 0-1 mA at 7.5 V, Max.
  • 0-20 mA at 12 V, Max.

Excitation Voltage

  • Bridge Excitation: 0-10.1 V, 120 mA - Max.
  • Bridge Excitation: Current Drive Decreases at 10 mA/V Below 5 V

Frequency

  • LED Indication (Green), Approximately 110 % Input: 8 Hz Flash

Humidity

  • Operating: 15 to 95 % Non-Condensing at 45° C (113° F)
  • Soak: 90 % Non-Condensing for 24 Hours at 65° C (149° F)

Hysteresis

  • ± 0.1 % Typical
  • ± 0.2 % Maixmum of Selected Input Range at 25° C (77° F)

Input

  • -200 to 200 mV
  • Common Mode (Input to Ground): 1,800 Vdc, Max.
  • Overvoltage: Continuous 264 V, Max.
  • Overvoltage: Intermittent 400 V, Max.

Input Impedance

  • Voltage: > 1 Megaohm

Isolation

  • 800 Vdc between Input, Output & Power

Linearity

  • ± 0.1 % Typical
  • ± 0.2 % Maixmum of Selected Input Range at 25° C (77° F)

Mounting

  • DIN Rail Mounting

Operating Temperature

  • 0° to 55° C (32° to 131° F)

Output

  • 0-10 V
  • 0-20 mA
  • Voltage Drive: 10 mA - Max.

Output Impedence

  • Current: > 100 kiloohms
  • Voltage: < 10 ohms

Output Noise

  • 0.1 % RMS of Span, Max.
  • 10 mV, whichever is greater, Max.

Power Supply

  • Flexible DC: 18-30 Vdc

Response Time

  • 10 to 90 %: < 200 milliseconds, Typical

Span & Zero Adjustments

  • Input (Pushbutton Adjustment, Effective Span Turn Down): > 90 % Except for 10 mV & ± 5 mV Range in which 50 % Is, Max.

Stability

  • ± 0.025 %/°C Typical
  • 0.05 %/°C, Max.

Storage Temperature

  • -25° to 70° C (-13° to 158° F)

Switch Type

  • DIP Switches

Zero Offset

  • Input (Pushbutton Adjustment Effective): > 90 %

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