Product Introduction

The OWH-A supports a variety of commonly used industrial input signals, including RTD, resistor, potentiometer, voltage, current and 4–20mA, etc. The display range can be set from -99999 to 99999, and the unit and decimal point position can be freely adjusted.

Built-in multi-segment alarm output, can be used with relay to control external devices, and can be equipped with analog output and RS-485 communication for easy integration into automation control systems or upper-level monitoring platforms. It is widely used in process monitoring, equipment measurement and industrial control fields.

Features

• Accuracy: ± 0.1% full scale ± 1 decimal place (DC/PT-100/potential meter/resistor/load cell); ± 0.2% full scale ± 1 decimal place (AC).
• It can measure AC/DC current, AC/DC voltage, potentiometers, transmitters, temperature, load cells, resistance, and other signals.
• Display range: -19999 ~ 99999, decimal point can be arbitrarily set.
• When the maximum rated value is entered, the display range can be adjusted according to usage needs.
• It can automatically reset and hold (normal or maximum value) 2-4 level alarms (high and low alarms can be set by the user).
• Analog output (15-bit resolution) and digital communication (RS-485 interface) are optional functions and can be used simultaneously.
• High stability, flame-retardant PC casing, high safety.

Selected model/specification: OW5H-A-Code 1-Code 2-Code 3-Code 4-Code

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• Note 1: The 2-wire transmitter specification has a built-in 24Vdc excitation power supply, suitable for 2-wire (loop power) transmitters such as pressure, temperature, and humidity transmitters, and can be directly wired for use.
• Note 2: The 3- or 4-wire transmitter specifications provide a 24Vdc excitation power supply, suitable for 3- or 4-wire transmitters such as pressure, temperature, and humidity transmitters, and can be directly wired for use.
• Note 3: Two 5Vdc excitation power supplies for the load cell can be connected in parallel, while a 10Vdc excitation power supply is for single-cell use only.
• Note 4: For alarms with 3 or more relays, only A (NO.) contact output is provided.
• Note 5: The OC alarm provides output from the CE pin of the optocoupler NPN.

Specifications And Characteristics

• Accuracy: ±0.1% full scale ±1 decimal place (DC/potential meter/resistor/PT100/load cell); ±0.2% full scale ±1 decimal place (AC).
• Display screen: High-brightness red LED, character height 10.16mm (0.4”).
• Sampling time: 16 cycles/sec.
• Display range: -19999~99999
• Zero value adjustment range: -19999~99999
• Overload display: doFL / ioFL or -doFL / -ioFL
• Polarity display: Displays "-" when the input signal is reversed.
• Parameter setting method: Key input setting.
• Data storage method: E² PROM memory.
• Alarm action direction: "≥ (Hi) action" or "＜ (Lo) action" can be set.
• Alarm delay time: User-configurable (0-99 seconds).
• Relay contact capacity: AC 277V/7A, DC 30V/7A
• Analog output resolution: 15-bit digital to analog.
• Analog output response time: ＜250ms (0-90%).
• Analog output driving capability: Voltage output ＜20mA, Current output ＜10V
• Communication method and protocol: RS-485 Modbus RTU mode.
• Communication transmission rate: 19200/9600/4800/2400 BRPMS (selectable).
• Temperature coefficient: 100ppm/°C (0-60°C).
• Operating environment temperature and humidity: 0-60°C, 20-90%RH (non-condensing).
• Storage environment temperature and humidity: -10-70°C, 20-90%RH (non-condensing).
• Operating power supply: AC/DC 100-240V; AC/DC 22-60V
• Power consumption: ＜8.5VA (full-function output).
• Insulation withstand voltage: 1.5 kVac/1 min (input/power supply).
• Input impedance:
  • Voltage: ＞2V: 20KΩ/V; ≤2V: 200MΩ
  • Current: ≥0.2A: 100mV (terminal voltage drop); ＜0.2A: 1V (terminal voltage drop).

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Wiring Diagram