Q8 B8 Series

This product is covered by ACI's Two (2) Year Limited Warranty. Learn more

Product overview

BACnet MSTP, Expl Proof, Smart Sensor, Carbon Monoxide, 0-250 ppm, 3 SPDT Relays, NEMA 4X

Application

  • Mechanical Rooms
  • Warehouses
  • Refrigeration Plants
  • Industrial Plants
  • Process Monitoring
  • Leak Detection
  • Parking Garages
  • Auto/Truck Maintenance Facilities
  • Oil and Gas Industry

Product specifications

Supply Voltage:
Q8: VDC Supply Voltage: 24 VDC nominal (+18 to 30 VDC) (Q8: AC Power must not be grounded) Q8: VAC Supply Voltage: 24 VAC nominal (+15 to 24 VAC, AC Power must not be grounded) B8: VDC Supply Voltage: 24 VDC nominal (+18 to 30 VDC) (AC Power can be grounded or non-grounded) B8: VAC Supply Voltage: 24 VAC nominal (+15 to 24 VAC, AC Power must not be grounded)
Fuse Protection:
0.750A Polyswitch; (Automatically resets after fault is cleared & power to circuit is removed)
Supply Current / Power Consumption:
0.3A maximum | 8.4 VA
Analog Outputs:
Q8 Only: 4-20 mA, 1-5 VDC or 2-10 VDC (4-Wire Power, Power Ground, Output Signal, Output Signal Common)
Output Load Impedance:
4-20 mA Output: 600 Ohms maximum | 1-5 VDC or 2-10 VDC: 3000 Ohms minimum
Communication Protocols:
Q8 Communication Protocols: RS-485 Modbus RT/OptoMux (Proprietary QEL Communication) B8 Communication Protocols: RS-485 Serial BACnetTM MS/TP (Master and Slave; Default: Master)
Supported Baud Rates:
Q8: 1200, 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, 76800 Bits/Second (Default: 4800) B8: 9600, 19200, 38400, 76800 Bits/Second (Default: 38400)
Factory Calibration Range:
See Gas Sensor Selection & Specification Table on back of data sheet
Display:
LCD Graphic Display with backlight (Displays TWA, STEL and PEAK Daily Value)
Keypad:
Three (Non-Intrusive) Magnetic Switches
Relays / Contact Type / Relay Contact Ratings:
Three, SPDT (Form 1C) Dry Contact rated 1.0A max. @ 30 VDC or 0.3A max. @ 125 VAC (Resistive Load)
Status LED Indication:
Two Green LED’s (Tx/Rx Communication Status), Three Red LED’s (Relays 1, 2 & 3 Status)
Factory Calibrated Ranges:
See Gas Sensor Selection & Specification Table on back of data sheet
Warm Up Time:
24 Hours (Allow 24 hours before calibrating sensor after initial installation)
Sensor Type:
See Sensor Technology Type in Table on back of Product Data Sheet
Gas Types:
Combustible and Toxic Gases/Oxygen Sensor
Life Expectancy:
Electrochemical (Toxic): 2 to 3 Years, typical Oxygen/Hydrogen (Toxic): 18 months, typical Catalytic (Combustible): 3 to 5 years, typical
Unit Shelf Life:
Electrochemical (Toxic): 6 Months from date of purchase (Must be installed and operational) Catalytic (Combustible): 1 Year from date of purchase (Must be installed and operational)
Replacement Sensor:
See User’s Manual or Contact ACI
Recommended Maintenance:
Catalytic (Combustible): Accuracy & Bump test every 3 months or as required by Code Electrochemical (Toxic): Accuracy & Bump test every 6 months or as required by Code Oxygen/Hydrogen (Toxic): Calibrate every 3 months
Enclosure Specifications (Type, Material Type, Flammability, NEMA/IP Rating, Explosion Proof):
Industrial Connection Head; Cast Aluminum Epoxy Coated NEMA 4X (IP66), Division 1 Division 2, ANSI/ISA 12.22.01 Class I, Zone 1, AEx d II C, IP66 Zone 1 CSA E60079-1 Ex d II C, Class I, Zone I, IP 66 CSA C22.2 No. 30 Class I, Groups A, B, C, D; Class II Groups E, F, G; Class III
Operating Environment:
Indoor Use only
Conduit Knockouts:
Two 3/4" NPT Threaded Openings
Operating Temperature / RH:
See Sensor Selection & Specification Table on back of data sheet | 5 to 95% RH, non-condensing
Operating Atmospheric Pressure:
14.696 psi (1.0132 bar) +/- 10% Note: When installed @ >3000’ above sea level, the gas transmitters must be verified for accuracy & re-calibrated as needed after installation
Storage Temperature | RH Range:
32 to 68°F (0 to 20°C) | 5 to 95% RH, non-condensing
Wiring Connections / Wire Size:
Depluggable Screw Terminal Blocks | 16 to 24 AWG (0.51 to 1.30 mm) Shielded Twisted Pair
Communications Cable:
Belden 9841 or Equivalent, 120 Ohms Input Impedance
Terminal Block Torque Rating:
0.37 ft-lb (0.502 Nm) Nominal
Coverage Area / Mounting Height:
See Gas Sensor Selection & Specification Table on back of data sheet
Agency Approvals:
RoHS, CSA-Class 4828-02 inspected to C22.2 No. 30 and No. 142 (CSA File #: 088890_0_000)
Product Weight:
4.35 lbs. (1.973 kg)
Product Dimensions:
7.48" (190 mm) x 5.71" (145 mm) x 5.12" (130 mm)

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