PS-7 / PS-8

Semiconductor Gas Detector

Features

Features

  • āļāļēāļĢāļ•āļĢāļ§āļˆāļˆāļąāļšāđāļāđŠāļŠāļ—āļĩāđˆāļŦāļĨāļēāļāļŦāļĨāļēāļĒ : āļĢāļ­āļ‡āļĢāļąāļšāļāļēāļĢāļ•āļĢāļ§āļˆāļˆāļąāļšāđāļāđŠāļŠāļ•āļīāļ”āđ„āļŸ āđāļāđŠāļŠāļžāļīāļĐ āđāļĨāļ°āļ­āļ­āļāļ‹āļīāđ€āļˆāļ™ āđ‚āļ”āļĒāđƒāļŠāđ‰āđ€āļ‹āđ‡āļ™āđ€āļ‹āļ­āļĢāđŒāļ—āļĩāđˆāļ­āļ­āļāđāļšāļšāđ€āļ‰āļžāļēāļ°āļŠāļģāļŦāļĢāļąāļšāđāļāđŠāļŠāđāļ•āđˆāļĨāļ°āļŠāļ™āļīāļ”
  • āļāļēāļĢāļ­āļ­āļāđāļšāļšāļ—āļĩāđˆāļāļ°āļ—āļąāļ”āļĢāļąāļ”āđāļĨāļ°āļ™āđ‰āļģāļŦāļ™āļąāļāđ€āļšāļē : āļ‚āļ™āļēāļ”āđ€āļĨāđ‡āļāđāļĨāļ°āļ™āđ‰āļģāļŦāļ™āļąāļāđ€āļšāļē āļŠāđˆāļ§āļĒāđƒāļŦāđ‰āļ•āļīāļ”āļ•āļąāđ‰āļ‡āđāļĨāļ°āļšāļģāļĢāļļāļ‡āļĢāļąāļāļĐāļēāđ„āļ”āđ‰āļ‡āđˆāļēāļĒ
  • āļŦāļ™āđ‰āļēāļˆāļ­ LCD āļ—āļĩāđˆāļ­āđˆāļēāļ™āļ‡āđˆāļēāļĒ : āđāļŠāļ”āļ‡āļ„āđˆāļēāļ„āļ§āļēāļĄāđ€āļ‚āđ‰āļĄāļ‚āđ‰āļ™āļ‚āļ­āļ‡āđāļāđŠāļŠ āļŠāļ–āļēāļ™āļ°āļāļēāļĢāļ—āļģāļ‡āļēāļ™ āđāļĨāļ°āļ‚āđ‰āļ­āļ„āļ§āļēāļĄāđāļˆāđ‰āļ‡āđ€āļ•āļ·āļ­āļ™āļ•āđˆāļēāļ‡ āđ† āļ­āļĒāđˆāļēāļ‡āļŠāļąāļ”āđ€āļˆāļ™
  • āļāļēāļĢāđ€āļ›āļĨāļĩāđˆāļĒāļ™āđ€āļ‹āđ‡āļ™āđ€āļ‹āļ­āļĢāđŒ : āđ‚āļĄāļ”āļđāļĨāđ€āļ‹āđ‡āļ™āđ€āļ‹āļ­āļĢāđŒāđāļĨāļ°āđ€āļŠāđ‰āļ™āļ—āļēāļ‡āļāļēāļĢāđ„āļŦāļĨāļ‚āļ­āļ‡āđāļāđŠāļŠāļ–āļđāļāļ­āļ­āļāđāļšāļšāđƒāļŦāđ‰āļ–āļ­āļ”āđ€āļ›āļĨāļĩāđˆāļĒāļ™āđ„āļ”āđ‰āļ‡āđˆāļēāļĒāđ‚āļ”āļĒāđ„āļĄāđˆāļ•āđ‰āļ­āļ‡āđƒāļŠāđ‰āđ€āļ„āļĢāļ·āđˆāļ­āļ‡āļĄāļ·āļ­
  • āļŸāļąāļ‡āļāđŒāļŠāļąāđˆāļ™āļāļēāļĢāļ„āļ§āļšāļ„āļļāļĄāļāļēāļĢāđ„āļŦāļĨāļ‚āļ­āļ‡āļāļēāļĢāđ€āļāđ‡āļšāļ•āļąāļ§āļ­āļĒāđˆāļēāļ‡ : āļĢāļąāļāļĐāļēāļ­āļąāļ•āļĢāļēāļāļēāļĢāđ„āļŦāļĨāļ‚āļ­āļ‡āļāļēāļĢāđ€āļāđ‡āļšāļ•āļąāļ§āļ­āļĒāđˆāļēāļ‡āđƒāļŦāđ‰āļ„āļ‡āļ—āļĩāđˆāđ€āļžāļ·āđˆāļ­āļāļēāļĢāļ•āļĢāļ§āļˆāļˆāļąāļšāļ—āļĩāđˆāđ€āļŠāļ–āļĩāļĒāļĢ
  • āļāļēāļĢāđ€āļŠāļ·āđˆāļ­āļĄāļ•āđˆāļ­āļāļąāļšāļĢāļ°āļšāļšāđ‚āļŪāļŠāļ•āđŒ : āļĢāļ­āļ‡āļĢāļąāļšāļāļēāļĢāļŠāļ·āđˆāļ­āļŠāļēāļĢāļœāđˆāļēāļ™ DeviceNet āļ—āļģāđƒāļŦāđ‰āđ€āļŠāļ·āđˆāļ­āļĄāļ•āđˆāļ­āļāļąāļš PLC āđ„āļ”āđ‰āļ‡āđˆāļēāļĒ

Specifications 

ModelPS-7
Target GasCombustible Gas / Toxic Gas / Oxygen
Sensor TypeCombustible Gas: Electrochemical cell
Toxic Gas: Hot wire semiconductor
Oxygen: Galvanic cell
Detection RangeSet to user specifications
Sampling MethodAutomatic suction type
Transport SystemFlow rate: 0.5 mL/min, Teflon, 4mm in ID × 6mm on OD, Length: up to 20m
Alarm Indication
  • Gas alarm: 1st stage and 2nd stage
  • Low flow alarm
  • Sensor trouble alarm / incorrect sensor inserting alarm
  • Pyrolyzer wire break alarm (*only for the model with a pyrolyzer)
Applicable Cable
  • 3C or 4C shielded control cable (φ8-11 mm) ×2
  • Digital signal Ethernet 100base-Tx and PoE: LAN cable, CAT-5e or higher
External Outputs
  • Gas concentration analog output DC4-20mA (shared with the negative power source)
  • Gas alarm contact (1st and 2nd stage) 1a non-voltage contact/ automatic return
  • Trouble alarm contact (open collector/ automatic return)
Power SupplyDC24VÂą10%
Power ConsumptionApprox. 7W
Operating Temperature and Humidity0°C  to 40°C  (without sudden changes), 30 to 85% RH (without condensation)
External DimensionsW62×H124×D143 mm
WeightApprox. 1.0 kg

 


Specifications 

ModelMain unit: PS-8N, PS-8M
Sub unit: PS-8S
Target GasCombustible Gas / Toxic Gas / Oxygen
Sensor TypeCombustible Gas: Electrochemical cell
Toxic Gas: Hot wire semiconductor
Oxygen: Galvanic cell
Detection RangeSet to user specifications
Sampling MethodAutomatic suction type (approx. 0.5L/min Âą20% automatic suction flow rate control)
Display
  • Monochrome LCD full dot display
  • Gas concentration: 5-digit display (with units)
  • Others: Gas name display, flow rate status indicator, alarm (1st and 2nd stage) status indicator, fault alarm display
    *Not available for PS-8S (display on main unit)
Alarm Set ValueSet to user specifications
Alarm Accuracy
  • Combustible gas: Âą25% of alarm set value (under equivalent conditions)
  • Toxic gas: Âą30% of alarm set value (under equivalent conditions)
  • Oxygen: Âą1 vol% (under equivalent conditions)
Alarm Delay
  • Combustible gas: within 30 seconds at 1.6 times the alarm set value
  • Toxic gas: within 60 seconds at 1.6 times the alarm set value
  • Oxygen: within 5 seconds at 10 vol% until the concentration reaches 18 vol% (at 20Âą2°C)
    (Excluding pipe length and communication time for all gases listed above)
Alarm Indication
  • Gas alarm 1st stage: Alarm 1 LED (RED) flashing, LCD screen display: ALARM1
  • Gas alarm 2nd stage: Alarm 2 LED (RED) flashing, LCD screen display: ALARM2
External Outputs

[Digital signal*1]

  • PS-8M: Ethernet 10BASE-T/100base-Tx(Modbus/TCP)
    Modbus/TCP (Maximum number of connections depends on system configuration)
    Maximum transmission distance 100m (up to HUB)
  • PS-8N, PS-8S: None 
    *PS-8N: RS485 (Modbus-RTU) when using the expansion unit MR module

[Gas concentration analogue signal*2]

  • PS-8N, PS-8M: DC4-20mA (common negative terminal with power source) (output accuracy: within FS Âą0.5%)
    *0.6mA or less when a fault alarm indication occurs *300ÎĐ or less including wiring resistance 

[Collective gas alarm contact (1st and 2nd stage), collective fault alarm indication contact*3]
1a non-voltage contact/ automatic return
*Rated load: AC125V 0.5A or DC30V 1.0A (resistive load)
*Individual contact outputs require an expansion unit

Explosion-proof PerformanceNon-explosion-proof
Power Supply
  • PS-8N: DC24VÂą10%
  • PS-8M: DC24VÂą10% or PoE (Power over Ethernet, IEEE 802.3at)
  • PS-8S: Supplied from the main unit
Power ConsumptionCDS-7 Sensor: 3.5W (max. 5.2W)
CDS-7 Sensor (catalytic conversion type): 4.0W (maximum 5.9W)
COS-7 Sensor: 3.5W (max. 5.2W)
CHS-7 Sensor: 4.0W (max. 5.9W)
*When analog output and digital output are used simultaneously, power consumption increases
Operating Temperature and Humidity0°C  to 40°C  (without sudden changes), 30 to 85% RH (without condensation)
External Dimensions
  • PS-8N, PS-8M: W70 mm x H124 mm x D172 mm (excluding protrusions)
  • PS-8S: W70 mm x H124 mm x D172 mm (excluding protrusions)
Weight
  • PS-8N, PS-8M: approx. 850g (excluding sensor)
  • PS-8S: approx. 770g (excluding sensor unit)

 

*1 Only Ethernet or expansion unit Modbus-RTU can be used.
*2 The analog output of the main unit is for the main unit only. The analog output of the sensor equipped with the sub unit requires an expansion unit (AO module).
The expansion unit (AO module) can also output analog signals from the sensor mounted on the main unit, allowing multi-core connections.
*3 When installing two or more sensors using subunits and using individual contact outputs, use an expansion unit (DO module).
In this case, the individual outputs for the sensor mounted on the main unit are output from the expansion unit (the main unit's contact are a collective output).


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