I.S. AO 4-20 mA HART CHARM specifications

Installation notes

This Intrinsically Safe CHARM requires an I.S CHARM Terminal Block.

Specifications

Table: I.S. AO 4-20 mA HART CHARM specifications
Item Specification
Channel type and functionality Intrinsically safe analog output:
  • 4-20 mA with HART
  • 0-20 mA
Nominal signal range (span)
  • 4-20 mA
  • 0-20 mA optional
Full signal range 0-22 mA
Accuracy over temperature range
  • 0.25% of span (0 to 60°C)
  • 0.5% of span (40°C to 70°C)
Resolution 16 bits
Calibration None required
Compliance voltage
  • Voltage to load: 15 V minimum at 20 mA
  • Load resistance: 750 Ω maximum
Channel isolation Galvanically isolated according to EN 60079-11, voltage peak value 375 VDC.
Input power requirements +24 VDC input power: +24 VDC ±10% at 56 mA maximum
CHARM heat dissipation (includes terminal block) 1.1 W
HART scan time Typically less than one second but is dependent on HART communication loading and the capability of the HART device.
HART Communications
  • HART 7 pass-through request/response
  • HART 7 variable report
  • Field device status report

Wiring diagram

Figure: I.S. AO 4-20 mA HART CHARM wiring diagram