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202 Field Mounting Rate Totalizer
Brand: YokogawaThe 202Ai Loop Powered Rate Totalizer is designed to operate with any flowmeter which produces a 4-20mA output, including differential pressure devices, magnetic or vortex flowmeters.
The 202Ai is powered entirely from the 4-20mA current loop and has a maximum of 2.5 volts drop across the input.
The Rate Totalizer is fully programmable with linear or square law input relationships, programmable span, cutoffs and conversion factors. a non-volatile memory stores all set up parameters and totals without the need for internal batteries or external power.
High and low alarms are standard via optically isolated solid state relay outputs. Alternatively, the high alarm output can be programmed to provide a scaled pulse output proportional to the total.
Watertight Enclosure
The 202Ai Rate Totalizer is housed in a rugged, yet attractive, IP67 (Nema 4X) polycarbonate enclosure which is completely watertight.
A wall mounting bracket is supplied as standard, while a 2” pipe mounting bracket is available as an option. Alternatively, the Model 202Ai can be supplied as a panel mount instrument.
Intrinsically Safe
The Model 202Ai is certified as intrinsically safe to European CENELEC standards, and CSAUS/C standards for both the USA and Canada.
Features- Powered by 4-20mA loop
- Displays Rate, Total and Accumulated Total
- Linear or square law inputs
- High and low flow rate alarm
- Pulse output
- Intrinsically safe
- Watertight to IP67 (Nema 4X)
- Wall, pipe and panel mounting
- Fully programmable
Specifications
Brand
Accuracy
- 0.05% of Span at 25° C (77° F)
- 0.1% of Span Typical, Full Temperature Range
Approvals & Certifications
- CE
- CENELEC Ex Ia LlB T4
- CSA Class I, Groups C, D
Display
- 4-Digit Display 0.33" (8.5 mm) High Digits - Rate
- 7-Digit Display 0.4" (10 mm) High Digits - Resettable Total
- LCD Display
Electrical Connectors
- 2-Wire
- Cable Gland
Electrical Rating
- 200 mA at 30 Vdc, Maximum
Enclosure, Body Material
- Polycarbonate
Environmental Protection
- IP67
- NEMA 4X
- Watertight
Input
- 4-20 mA Loop Powered: 28 V, 93 mA, 653 mV, Maximum
- Linear
- Square Law
Linearization
- 0.05% of Span
Mounting
- 2" Pipe Mounting Bracket
- Galvanized Metal Bracket - Pipe Mounting
- Panel Mount
- Wall Mounted
Mounting Position
- Horizontal
- Universal
- Vertical
Operating Temperature
- -20° to 60° C (-4° to 140° F)
Output
- 0.8 Vdc - Saturation Voltage
- 4-20 mA
- Pulse Signals
- Relay: 28 V, 93 mA, 653 mV
Relay Operation
- 2 Solid State Relay Outputs Suitable for Driving DC Solenoids or External Relays - Alarm/Pulse Outputs
Resolution
- 0.05% of Span
Update Time
- 0.5 seconds - 4-20 mA Input
Voltage Drop
- 2.5 V, Maximum
