Detcon PI-600 User Manual
Page 14
3.3 S
PECIFICATIONS
Method of Detection
Plug-in Miniature PID Sensor
Repeatability
± 2% FS
Response 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 I
NSTALLATION
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 mA (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 A & B (IN) and A & B (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