I.S. DO 45 mA CHARM

Installation notes

This Intrinsically Safe CHARM requires an I.S. CHARM Terminal Block.
This CHARM can be configured for momentary output or continuous pulse output.
This CHARM has short circuit protection and supports line monitoring for sensing field wiring faults such as open and short circuits. Line monitoring is enabled in the configuration.

Specifications

Table: I.S. DO 45 mA CHARM specifications
Item	Specification
Channel type	Intrinsically Safe Discrete output
Configuration options	Momentary output Continuous pulse output Line fault testing
On-state output rating	22 V to 25 V (open circuit); 11 V at 45 mA
Off-state leakage current	230 µA
Line fault detection levels	Guaranteed short circuit: <100 Ω load Guaranteed good status: 150 Ω < r_load < 20 kΩ load Guaranteed open circuit: 25 kΩ load
Line fault test timing	180 to 220 µsec
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 78 mA maximum
CHARM heat dissipation (includes terminal block)	1.4 W

Figure: Voltage-current curve

Wiring diagram

Figure: I.S. DO 45 mA CHARM wiring diagram

Related information

I.S. CHARM Terminal Block specifications