Product data

DeltaV Product Data Sheet
October 2014 – Page 30 S-Series Electronic Marshalling
Discrete Input 120 VAC Isolated CHARM
Specifications for DI 120 VAC Isolated CHARM
Detection level for On
> 84 VAC
Detection level for Off
< 34 VAC
Wetting Current 2 mA at 120 VAC
Input Impedance
60 KΩ (approximately)
Maximum Input Voltage 130 VAC
Frequency 50/60 Hz
Isolation Each channel is optically isolated from the system at
250 VAC
Configurable channel types:
Discrete input
Pulse Count
Dry contact or discrete state sensor changing <2 Hz
Pulse train 0.1 Hz to 10 Hz
Field Circuit Protection - Recommend External Fuse at power source
- Field wiring disconnect
CHARM power req. 12 mA max @ 24 VDC
CHARM Heat Dissipation 0.41 W
Simplified Circuit and Connection Diagrams for DI 120 VAC Isolated CHARM
Simplified Circuit and Connection Diagrams for DI 120 VAC Isolated CHARM with 3-wire DI Fused Injected Power Terminal
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