Vaisala HUMICAP® Humidity and Temperature Module HMM170 is an open frame OEM transmitter for integration into demanding environmental chambers and harsh conditions. The module provides a digital RS-485/Modbus RTU and three freely configured analog output channels.
| Property | Description/value |
|---|---|
| Three analog outputs (selectable and scalable) |
0 … 20 mA, 4 … 20 mA 0 … 1 V, 0 … 5 V, 1 … 5 V, or 0 … 10 V |
| Typical accuracy of analog output at +20 °C (+68 °F) | ±0.05 % full scale |
| Typical temperature dependence of analog output | 0.005 %/˚C (0.003 %/°F) full scale |
| External load | RL < 500 Ω |
| Digital output | RS-485 serial, Modbus |
| Service port | M8 connector for USB cable |
| Start-up time | 3 s at power-up |
| Wire size | 0.5 … 1.5 mm2 (20 … 16 AWG) |
| Supply voltage | |
| when condensation prevention and chemical purge features are not used |
12 … 35 VDC |
| all features available |
18 … 35 VDC or 24 VAC ±10 % |
| Power consumption | |
| Analog outputs |
12 mA (voltage), 50 mA (current) |
| Chemical purge at 24 VDC | +220 mA |
| Warmed probe at 24 VDC | +240 mA |
| Property | Description/value |
|---|---|
| Operating temperature for component board |
−40 … +60 °C (−40 … +140 °F) |
| Operating humidity for component board | 0 … 100 %RH, non-condensing |
| Storage temperature | −55 … +80 °C (−67 … +176 °F) |
| Operating pressure | 0 … 10 bar |