| Model |
NCS-HM105-USB (USB Interface)
NCS-HM105-RS232 (RS-232 Interface, with A: adjustable amplitude, B: fixed) |
| Communication Protocol |
HART (FSK) Physical Layer Specification compliant |
| Communication Mode |
1200 bps half-duplex asynchronous serial communication |
| Interface Type |
NCS-HM105-USB: USB (virtual COM port via FTDI chip, supports Windows/Linux/Mac OS/Windows CE)
NCS-HM105-RS232: RS-232 serial port |
| Ambient Operating Temperature |
-20 °C ~ +50 °C |
| Isolation Voltage |
1000 VAC (transformer isolation) |
| Receiving Impedance |
≥ 5 KΩ |
| Receiving Sensitivity |
120 mVpp |
| Output Amplitude |
NCS-HM105-USB: 500 mVpp @ 500 Ω
NCS-HM105-RS232A: 60 ~ 330 mVpp @ 250 Ω (adjustable)
NCS-HM105-RS232B: Fixed amplitude |
| Power Supply (NCS-HM105-USB) |
Optional external 24 VDC supply (switchable)
Current draw at 24 V output: < 40 mA |
| Power Supply (NCS-HM105-RS232) |
No external power required (low power design) |
| Built-in 250 Ω Resistor (HM105-USB) |
Provided when 24 V power switch is ON |
| Dimensions |
70 mm × 50 mm × 18 mm |
| Connection to HART |
Non-polar alligator clips / hook test clips (2 m cable length included) |
| Indicators (NCS-HM105-USB) |
Red: Power, Yellow: Receiving, Green: Transmitting |
| Indicators (NCS-HM105-RS232) |
Red: Serial port enable, Yellow: Receiving, Green: Transmitting |
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