background image

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

Configuration of the CDT-MOD-2000 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)

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

Figure 2d - Wiring diagram: Relay

NC
COM
NO

STEP 2: WIRING DIAGRAMS

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 section and length of the used 
connection wires. If long and/or small cross section wires are used, supply cur-
rent 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

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.

Summary of Contents for CDT-MOD-2000 Series

Page 1: ...where there is a constant source of carbon dioxide present for example hospitals and greenhouses SPECIFICATIONS Performance Measurement ranges CO2 400 2000 ppm Temperature 0 50 C Relative humidity 0 100 Accuracy CO2 40 ppm 2 of reading DC model 75 ppm or 10 of reading whichever is greater Temperature 0 5 ºC Relative humidity 2 3 at 0 50 C and 10 90 rH Total error band includes accuracy hysteresis ...

Page 2: ...a with good ventilation and an average temperature where it will be responsive to changes to the room conditions The CDT MOD should be mounted on a flat surface Do not locate the CDT MOD 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 ma...

Page 3: ...put 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 Figure 2d Wiring diagram Relay NC COM NO STEP 2 WIRING DIAGRAMS NOTE When using long connection wires it may be necessary to use a separate GND wire for voltage ...

Page 4: ...0 0 90 0 3x0009 TE high limit 16 bit 50 500 5 0 50 0 C 3x0010 TE low limit 16 bit 0 450 0 45 0 C 3x0011 Parameter for relay 16 bit 0 3 0 CO2 1 rH 2 TE 3 Off 3x0012 CO2 relay on 16 bit 500 1950 500 1950 ppm 3x0013 CO2 relay off 16 bit 450 1900 450 1900 ppm 3x0014 rH relay on 16 bit 15 990 1 5 99 0 3x0015 rH relay off 16 bit 10 985 1 0 98 5 3x0016 TE relay on 16 bit 15 490 1 5 49 0 C 3x0017 TE relay...

Reviews: