ROTRONIC HygroLog HL-NT - Manual (Page 27)

IN-E-HL-NT-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroLog HL-NT data logger:
instruction manual Instruction Manual
Document Type
Page 27 of 48
Document title
© 2009-2012; Rotronic AG IN-E-HL-NT-V2_12
Docking stations HL-DS-PT2, HL-DS-PT4 and HL-DS-PT4-WL: direct Pt100 RTD
Docking stations with logical inputs
Logical Thresholds: logical 1:
≥ 2.8 VDC, logical 0: ≤ 0.7 VDC
Docking station HL-DS-R1 with relay outputs
3
4 1
2
1: Normally closed (relay de-energized)
2: Common
3: Normally open
4: Not used
4
3 2
1
1: + 3.5 VDC
2: Input 1
3: Input 2
4: GND
1
2
GND: not used (eventually use for a shield)
+3.5 V
Note: an internal pull-down resistor sets
each input to 0 when the contact is open.
1: DC (+)
2: measurement (+)
3: measurement (-)
4: DC (-)
1
2
3
4
4-wire RTD
4
3 2
1