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Model-A-700
Open-Frame Power Supply for Dwyer Pressure, Temperature, & Velocity Transmitters
Models In Stock
- Universal supply voltage input
- Compact size
Model-A-700
From
C$
209.02
Models In Stock
Product Overview
- Dynamic Response 30 μs for 50% Load Change
- Frequency Input Range 47 to 63 Hz
- Line Regulation ± 0.05% for ± 10% line change
- Load Regulation ± 0.05% for 50% load change
- Operating Temperature, Max 122 °F
- Operating Temperature, Min 32 °F
- Output Detail Current Output: Dependent on model (derate output current 10% for 50 Hz operation)
- Output Ripple 2 mV RMS max, 3 mV peak to peak
- Overcurrent Protection 0.5 A Fuse for 100 to 120 Vac, 0.25 A Fuse for 220 to 240 Vac
- Series ID Model-A-700
- Storage Temperature, Max 185 °F
- Storage Temperature, Min -40 °F
- Thermal Regulation ± 0.02%/°C (maxi), ± 0.005%/°C (typical)
- Voltage Input Range 100 to 240 Vac
- Voltage Output Range 24 to 28 Vdc
Supported Applications
The Dwyer Model A-700 series is an economical, open-frame power supply designed to power all Dwyer pressure, temperature, or air velocity transmitters. The compact size facilitates enclosure installation in automation and control systems.
Operating Conditions & Performance
The Series A-700 accepts a wide AC input range of 100/120/220/230-240 VAC ±10% at 47-63 Hz. It provides a regulated DC output of 24-28 VDC. Performance specifications include line regulation of ±0.05% for ±10% line change, load regulation of ±0.05% for 50% load change, and thermal regulation of ±0.02%/°C maximum (±0.005%/°C typical). Output ripple is limited to 2 mV RMS maximum or 3 mV peak-to-peak, with a dynamic response time of 30 microseconds for a 50% load change.
Operating ambient temperature ranges from 32-122°F (0-50°C). Storage temperature is rated -40 to 185°F (-40 to 85°C).
Configuration Options
The series offers three current output configurations, with maximum ratings dependent on the specific model and line frequency. Output current must be derated by 10% for 50 Hz operation.
- A-700: Rated at 0.5 A @ 60 Hz (derates to lower output at 50 Hz).
- A-700-2: Rated at 2 A @ 60 Hz.
- A-700-4: Rated at 4.8 A @ 60 Hz.
The unit features an open-frame design with input/output solder terminals for direct connection. Auxiliary inputs are selectable via jumpers to accommodate worldwide power sources; the unit is factory wired for 117 volts and requires jumper adjustment before operation at other line voltages. External fusing is required but not included: a 0.5 Amp fuse for 100-120 VAC input or a 0.25 Amp fuse for 220-240 VAC input.
Approvals include UL and CSA certification (per instruction manual).
Key Product Differences
Variants differ primarily by maximum current output capability, which dictates the physical dimensions of the unit. The A-700 model measures 4"H x 3-3/8"W x 1-5/8"D (approximate based on dimension labels). Higher current models increase in height and width to accommodate internal components; for example, the A-700-2 is approximately 4-7/8"H x 4-1/8"W. The chassis generates heat during normal operation due to the regulator, requiring an unrestricted mounting area or moving air in confined spaces.
PDFs & Manuals
