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DC7 Output Isolator
Brand: Yokogawa Electric Corporation
The DC7, a nest-mounting type DCS-supported isolator, receives 4 to 20 mA DC signals from DCS, and converts them into 4 to 20 mA DC current signals.
Features- Bi-directional relay of HART communication signals is possible while the DCS and the field devices are isolated from each other
- When a load circuit opens, input resistance increases rapidly to 48 KiloOhms or more to detect the open state through the input device
- Recommended arrester: AR-SA or AR2-SA
Specifications
Accuracy
- ± 0.1 % of Span
Communication
- HART
Consumption
- 60 mA at 24 Vdc - Current Consumption
Electrical Connectors
- M4 Screw Terminal
Humidity
- 5 to 90 % Relative Humidity, Non-Condensing
Input
- 40 mA or Less - Max.
Input Signal
- 4-20 mA DC
Insulation Resistance
- 100 megaohms or more at 500 Vdc between Input & Output, Output & Power Supply, & Input & Power Supply
Mounting
- Nest-Mounting
Operating Temperature
- 0° to 50° C (32° to 122° F)
Output
- 4-20 mA DC
Power Supply
- 24 Vdc ± 10 % (Ripple Content 5 % Peak-to-Peak or Less)
Power Supply Effect
- ± 0.1 % of Span or Less for Fluctuation within the Operating Range of Power Supply Voltage Specification
Resistance
- 750 ohms or Less - Allowable Load Resistance
Response Time
- 25 milliseconds, 63 % Response (10 to 90 %)
Span & Zero Adjustments
- -1 to 1 % - Zero Adjustment
- 95 to 105 % - Span Adjustment
Supply Voltage
- 1,500 Vac/minute between Output & (Input & Power Supply) - Withstand Voltage
- 500 Vac/minute between Input & Power Supply - Withstand Voltage
Temperature Effect
- ± 0.2 % of Span or Less for a Temperature Change of 10° C (18° F) - Effect of Ambient Temperature
Voltage Drop
- 5 Vdc or Less