Distech Controls GS-CDR02K 하드웨어 설치 매뉴얼 - 페이지 4

{카테고리_이름} Distech Controls GS-CDR02K에 대한 하드웨어 설치 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Distech Controls GS-CDR02K 9 페이지. Room carbon dioxide transmitter

This is a 3-wire sourcing device. Connect the plus DC or the AC voltage hot side to the PWR terminal and the common is connected

to the COM terminal. The device is reverse voltage protected and will not operate if connected backwards. It has a half-wave power

supply so the supply common is the same as the signal common. Several devices may be connected to one power supply and the

output signals all share the same common. Use caution when grounding the secondary of a transformer or when wiring multiple

devices to ensure the ground point is the same on all devices and the controller.

The CO

analog output is available on the CO

10 Vdc) see Figure 8 and connects to the controller analog input. Check the controller Analog Input to determine the proper connection

before applying power. Both current and voltage signals are referenced to the COM terminal. The current output operates in the active

mode and does not require a loop power supply (the signal current is generated by the transmitter and must not be connected to a

powered input or device damage will result).

The optional relay output connects to the RELAY terminals. The relay output is completely isolated and has a Normally Open (NO)

signal. This signal can be used to directly control an alarm or ventilation fan. See specifications for contact ratings. See Figure 9.

The optional override signal is a two-wire dry contact normally open switch connected to the SWITCH terminals. See Figure 10.

The optional setpoint signal is a resistive signal that can vary from 0-10K ohms (for example) to simulate a slidepot action. It is available

on the SETPNT terminal and is referenced to COM. Several resistive values are available and the operation may be configured as

normal or reverse acting via the Setup Menu. See Figure 10.

The optional two-wire temperature sensor output is available with various RTDs and thermistors to suit all control applications and is

available on the TEMP terminals. See Figure 10.

Outputs

The CO

output signal is scaled such that 4-20 mA (or 0-5 / 0-10 Vdc) equals 0-2000 ppm by default. The signal span may be changed

via the Setup Menu from 1000 to 10,000 ppm in 500 ppm increments.

Start-up Mode

Verify the device is properly wired and connections are tight. Ensure the mA / VOLT switch is set for the correct signal type. Apply

power and the LCD will indicate the software version number, the output signal type and then the sensor will begin a one-minute

warm-up countdown. When the warm-up time expires the device will enter normal mode.

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terminal. This signal is switch selectable for either 4-20 mA or voltage output (0-5 / 0-

Figure 8. Analog output switch

Figure 9. Optional relay output wiring

Figure 10. Optional signal wiring