AB Quality 1414-ITS03PBRAA 설치 지침 매뉴얼 - 페이지 3

{카테고리_이름} AB Quality 1414-ITS03PBRAA에 대한 설치 지침 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. AB Quality 1414-ITS03PBRAA 8 페이지. Space temperature transmitter

Space Temperature Transmitter

About Space Temperature Transmitter

The unit is designed to convert a 1000 ohm RTD signal and provide a 4 to 20 mA

analog output with ±0.15°C Class A, ±0.30°C Class B and 0.1% FSO accuracy for the

board.

Designed for temperature measurement of occupied spaces. Featuring several

enclosure styles to accommodate various job requirements.

Transmitters are mounted directly on a wall or to a wall box. For the most accurate

results, units should be mounted on an inside wall to a wall box, approximately 3

to 5 feet from the floor, away from any supply air exhausts and other sources of

heat or cold. The enclosure cover is held in place with a locking tab located to the

left of center at the bottom of the enclosure. Remove the setpoint knob before

removing the cover. Use a set screw (1/16" or 1.5 mm) to lock the cover at the

bottom of the enclosure after installation.

Wire and Connect Space Temperature Transmitter

Connect the transmitter to the controller using 18 to 22 AWG twisted pair wiring.

The transmitter requires two wires for DC 4 to 20 mA loop-powered operation. The

use of shielded cable is optional but recommended for the highest noise immunity.

Do not route signal wires in the same conduit with power cables as signal

degradation may occur. The controller Analog Input (AI) must be selected to match

the transmitter output before power is applied. The AI type must be a current input

with 250 or 500 ohm impedance. All transmitters have an operating range of

0 to 70 °C (32 to 158 °F). The transmitter board should not be mounted where

temperatures exceed these values. See the connection diagram for more details.

Options, if included on your unit, are wired at the Setpoint and Override terminals.

The Return terminal is used as the common for both of these options. The LCD

display is powered by the same supply as the transmitter.

Wire to a Programmable Controller

This section indicates typical wiring connections to a programmable controller.

When you use this connection scheme, the nominal setpoint is wired to a 0 to 20

mA analog input. The setpoint current signal is reverse acting with respect to the

position of the setpoint slider. The setpoint current varies from 1.2 mA at the

minimum position to 0.8 mA at the maximum position. An analog input with 14-bit

resolution provides a resolution of 0.06°F over a range of 60 to 80°F. Analog

Publication 1414-IN012A-EN-P - October 2005