Detcon PI-600 Bedienungsanleitung PDF herunterladen (Seite 14)

3.3 SPECIFICATIONS

ethod of Detection

Plug-in Miniature PID Sensor

Repeatability

± 2% FS

esponse Time

T90 < 30 seconds

Temperature Range

0-50°C; 32-122°F

Humidity Range

0-99% RH noncondensing

Output

Linear 4-20 mA DC

3 Relays (Alarm 1, Alarm 2, and Fault) contacts rated 5A@ 150VAC, 5A @30 VDC

RS-485 Modbus™

Input Voltage

22-28 VDC

Power Consumption

Normal operation = 58 mA (1.4 watts @ 24VDC); Maximum = 128 mA (3.1 watts @ 24VDC)

Electrical Classification

Class 1; Groups B, C, D; Div. 1.

Sensor Warranty

12 Months

3.4 INSTALLATION

Optimum performance of ambient air/gas sensor devices is directly relative to proper location and installation practice.

3.4.1 Field Wiring Table (4-20 mA output)

Detcon Model PI-600 toxic gas sensor assemblies require three conductor connection between power supplies and host

electronic controllers. Wiring designators are

(DC),

–

(DC) , and

(sensor signal). Maximum single conductor

resistance between sensor and controller is 10 ohms. Maximum wire size for termination in the sensor assembly terminal

board is 14 gauge.

AWG

Meters Feet

20 240 800

18 360 1200

16 600 2000

14 900 3000

Note 1:

This wiring table is based on stranded tinned copper wire and is designed to serve as a reference only.

Note 2: Shielded cable may be required in installations where cable trays or conduit runs include high voltage lines or

other sources of induced interference.

The RS-485 (if applicable) requires 24 guage, two conductor, shielded, twisted pair cable between sensor and host PC.

Use Belden part number 9841. Two sets of terminals are located on the connector to facilitate serial loop wiring from

sensor to sensor. Wiring designators are

(IN) and

(OUT).

3.4.2 Sensor Location

Selection of sensor location is critical to the overall safe performance of the product. Five factors play an important role

in selection of sensor locations:

(1) Density of the gas to be detected

(2) Most probable leak sources within the industrial process

(3) Ventilation or prevailing wind conditions

(4) Personnel exposure

(5) Maintenance access

PI-600 Toxic Gas Sensors PG.14

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 36 37

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