Copyright HK Instruments 2021
www.hkinstruments.fi
Installation version 7.0 2021
CAUTION!
• For CE compliance, a properly grounded shielding cable is
required.
• Use copper wire only. Insulate or wire nut all unused leads.
• Supply a separate cable for relay and signal out when using line
voltage to power the relay.
• Any wiring may carry the full operating line voltage current based
on field installation. The cover locking screw must be installed if
the line voltage is supplied to the relay.
• 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.
1) Route the cables through the square opening in the back plate or
for surface wiring select a knockout on the top or bottom of the
wall plate, as shown in Figure 2a.
2) Connect the wires as shown in Figure 2b and 2c.
STEP 3: CONFIGURATION
WIRING DIAGRAMS
CONTINUED
Figure 2a - Routing the cables
24 V
GND
A
B
Analog
+
Output 0/2–10 V / 4–20 mA
output
Figure 2b - Wiring diagram: Power input & signal output
Wires can be routed through the square opening in the back plate
Wires can be routed through the top knockouts
Wires can be routed through the bottom knockouts
NC
COM
NO
STEP 2: WIRING DIAGRAMS
Figure 2d - Wiring diagram: Relay
NOTE! When using long connection wires it may be necessary to use a
separate GND wire for voltage output current to prevent measurement dis-
tortion. The need for an extra GND wire depends on the cross section and
length of the used connection wires. If long and/or small cross section wires
are used, supply current and wire resistance may generate a voltage drop in
the common GND wire resulting in a distorted output measurement.
24 V
GND
A
B
+
Analog
Output 0/2...10 V
V
output
Figure 2c - Wiring diagram: Extra GND wire
Configuration of the RHT-MOD series device consists of:
1) Configuring the jumpers (see step 4)
2) Configuration menu options. (Display versions only. See the
user manual for further details)
STEP 4: Jumper settings
(Grey colour indicates that a jumper is installed)
No jumper
Circuit open
Jumper installed
Circuit closed
Jumper stored
Figure 3 - Jumper installation
1) Configuration of the output modes:
Select the output mode, current (4–20 mA) or voltage (0–10 V),
by installing jumpers as shown in Figure 4.
To select 2–10 V output mode on a display version of the device:
First, select 0–10 V output by jumper, then change the voltage (V)
output from 0–10 V to 2–10 V via the configuration menu. Please
see the user manual for more details.