User Manual

E-M-HF8-V2_10
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroFlex HF8 Humidity Temperature
Transmitter: User Guide
Instruction Manual
Document Type
Page
18 of 35
Document title
© 2012; Rotronic AG E-M-HF8-V2_10
Terminal block K3 (RS-485): , terminals K3-1 and K3-2 can be used to power the HF8 from a 15 to 24 VDC
power supply connected to the RS-485 main data line. In this case, do not use terminals K6-1 and K6-2
(normally used to power the HF8).
K3-2: GND VDC (-), when HF8 is powered from RS-485 data cable
K3-3: D+ RS-485 +
K3-4: D- RS-485 -
Terminal Block K4 (Relay 3)
Description
K4-1: NC Normally closed (relay not energized)
K4-2: COM Common
K4-3: NO Normally open (relay not energized)
Terminal Block K5 (Relay 4)
Description
K5-1: NC Normally closed (relay not energized)
K5-2: COM Common
K5-3: NO Normally open (relay not energized)
Terminal Block K6 (power Supply)
Description
K6-1: -► Protective ground
K6-2: + Power supply: VDC (+) or VAC (Phase)
K6-3: - Power supply: VDC (-) or VAC (neutral) see also 6.4.3
Terminal Block K7 (Relay 1)
Description
K7-1: NC Normally closed (relay not energized)
K7-2: COM Common
K7-3: NO Normally open (relay not energized)