Inputs and outputs - HMD60 - HMD62 - TMD62

HMD62 TMD62 Quick Guide

Document code
Content type
Product description > Features
Product description > Functions
Document type
User guide
Table 1. Inputs and outputs
Property Specification
Analog output
  • 1 x RH output 1 4 ... 20 mA current, loop powered
  • 1 x T output 4 ... 20 mA current, loop powered


  • 1 x T output 4 ... 20 mA current, loop powered

Power supply input

Each current loop output requires its own power supply.

10 … 35 VDC (RL = 0 Ω)

20 … 35 VDC (RL = 600 Ω)

Note: in HMD62, the RH screw terminals must always be wired. The transmitter receives power through the RH screw terminals, and does not power on if only the temperature (T) terminals are wired.

Service port connector M8 4-pin male connector for MI70 handheld indicator (requires cable accessory 219980SP) or Vaisala Insight PC software cable connection (requires USB cable accessory 219690) 2
Cable lead-throughs
  • M16×1.5 lead-through, options available from Vaisala:
    • Cable gland M16×1.5 (Vaisala item code: 254280SP). This is the default option delivered with HMD60.
    • Conduit fitting M16×1.5, ½”NPT (Vaisala item code: 210675SP)
  • Alternative M20×1.5 lead-through
Screw terminal wire size 0.5 ... 2.5 mm2
CAUTION Do not modify the unit or use it in ways not described in the documentation. Improper modification or use may lead to safety hazards, equipment damage, failure to perform according to specification, or decreased equipment lifetime.
1 Available calculated parameters for HMD62 include Td, Tdf, A, X, Tw, and H.
2 Vaisala Insight software for Windows available at