Vaisala HUMICAP Guía Rápida página 5

HMM170 Quick Guide
Vaisala HUMICAPâ 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.
Installing Module
The measurement probe with cable is attached to the component board at
Vaisala. Do not disconnect and reconnect the cable.
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SERVICE
+ VIN − + CH1 − + CH2 −
1 2
1. Attach the module securely using the mounting holes on the corners of the component
board.
CAUTION!
other applicable standoffs to attach the module to the minimum height of
6 mm (0.24 in).
2. Make sure that the module has a good earth connection from the plated mounting hole.
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4
GND
D+ D− GND
+ CH3 − PURGE
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The module is delivered with a set of standoffs. Use these or
Figure 1 HMM170 Component Board
1 Power input (12 ... 35 VDC)
2 Active analog outputs (0/4 ... 20 mA,
1 ... 5 V, 0 ... 5/10 V)
3 External purge trigger (closing
activates purge)
4 Grounding point
5 Digital RS-485 (Modbus) port
6 Service port (temporary connection,
MI70, USB cable with Vaisala Insight
Software)
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