ROTRONIC HygroLog HL-NT - Manual (Page 18)

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 18 of 48
Document title
© 2009-2012; Rotronic AG IN-E-HL-NT-V2_12
o HL-DS-U1: receptacle for AC adapter, one serial (RS232) port, one RS485 port (multi-
drop), four probe inputs (HygroClip 2 or analog probe with voltage output signal), one
connector for up to two logical input signals.
3.1.3 Docking stations with USB interface
o HL-DS-NT3: receptacle for AC adapter, one USB port and one RS485 port (multi-drop).
o HL-DS-U2: receptacle for AC adapter, one USB port, one RS485 port (multi-drop), four
probe inputs (HygroClip or analog probe with voltage output signal), one connector for up
to two logical input signals.
o HL-DS-U2-420: same as HL-DS-U2 but designed for analog probes with a 4-20 mA
output signal. Each probe input uses an internal 150 Ohm resistor to convert 4…20 mA to
600…3000 mV (nominal).
o HL-DS-PT2: receptacle for AC adapter, one USB port, one RS485 port (multi-drop
networking), four connectors for RTD probe (direct 4-wire connection), one connector for
up to two logical input signals.
o HL-DS-R1: receptacle for AC adapter, one USB port, one RS485 port (multi-drop
networking), one connector for up to two logical input signals and two independent relay
output connectors.
3.1.4 Docking stations with wired Ethernet interface
Note: with any of the following models, use an extension cable to separate all probes from either
the HygroLog HL-NT or docking station so as to avoid measurement errors due to self-heating by
the docking station.
o HL-DS-NT4: receptacle for AC adapter, one RJ45 connector (Ethernet), one RS485 port
(multi-drop) and one connector for up to two logical input signals.
o HL-DS-NT4-WEB: same as HL-DS-NT4 but with an internal web server that can be
accessed with a web browser.
o HL-DS-U4: receptacle for AC adapter, one RJ45 connector (Ethernet), one RS485 port
(multi-drop), four probe inputs (HygroClip or analog probe with voltage output signal), one
connector for up to two logical input signals.
o HL-DS-U4-WEB: same as HL-DS-U4 but with an internal web server that can be
accessed with a web browser.
o HL-DS-U4-420: same as HL-DS-U4 but designed for analog probes with a 4-20 mA
output signal. Each probe input uses an internal 150 Ohm resistor to convert 4…20 mA to
600…3000 mV (nominal).
o HL-DS-U4-420-WEB: same as HL-DS-U4-420 but with an internal web server that can
be accessed with a web browser.