Copyright HK Instruments 2021
www.hkinstruments.fi
Installation version 1.0 2021
Figure 2a - Routing the cables
Figure 2b - Wiring diagram: Power input & signal output
Figure 1a - Surface mounting
Figure 1b - Mounting orientation
YES
NO
NO
1) Route the cables through the opening in the back plate or for
surface wiring select a knockout on the bottom of the wall plate,
as shown in Figure 2a.
2) Connect the wires as shown in Figure 2b and 2c.
CAUTION!
• For CE compliance, a properly grounded shielding cable is
required.
• Use copper wire only. Insulate or wire nut all unused leads.
• Care should be used to avoid electrostatic discharge to the device.
• This unit has configuration jumpers. You may need to reconfigure
this device for your application.
STEP 2: WIRING DIAGRAMS
STEP 1: MOUNTING THE DEVICE
1) Select a mounting location on the wall at 1.2–1.8 m (4–6 ft) above
the floor and at least 50 cm (20 in) from the adjacent wall. Do
not block device air vents from any direction and leave atleast
20 cm (8 in) gap to other devices. Locate the unit in an area with
good ventilation and an average temperature, where it will be
responsive to changes to the room conditions. The Siro should be
mounted on a flat surface.
Do
not locate the Siro where it can be affected by:
• Direct sunlight
• Drafts or dead areas behind doors
• Radiant heat from appliances
• Concealed pipes or chimneys
• Outside walls or unheated / uncooled areas
2) Use the device as a template and mark the screw holes.
3) Mount the wall plate with screws.
C
AUTION! Incorrect installation may cause a shift in measurements.
Figure 1c - Mounting location
120 cm (4 ft)
180 cm (6 ft)
≥ 50 cm (20 in)
≥ 20 cm (8 in)
≥ 20 cm (8 in)
NOTE! When using long connection wires it may be necessary to use a
separate GND wire for voltage output current to prevent measurement
distortion. The need for an extra GND wire depends on the cross sec
-
tion and length of the used connection wires. If long and/or small cross
section wires are used, supply current and wire resistance may gener
-
ate a voltage drop in the common GND wire resulting in a distorted
output measurement.
When using AC power supply, make sure that the ground potential of
the signal is the same as the ground potential of the supply voltage to
avoid short circuit through the additional GND wire.
OUT1
OUT2
OUT3
OUT4
GND
A+
B–
24V
GND
GND
0-10V/2-10V/0-5V/4-20mA
0-10V/2-10V/0-5V/4-20mA
0-10V/2-10V/0-5V/4-20mA
0-10V/2-10V/0-5V/4-20mA
+
