Brandt Instruments Representing Otis Instruments Fixed Gas Detection System, OI-7543 WireFree 6-Channel Receiver for Gen II Fixed Gas Detection Systems
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Otis Instruments OI-7543-6
WireFree™ 6-Channel Remote Gas Sensor Monitor
Fixed Point Gas Detection Systems



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     Otis Instruments OI-7543 WireFree 4-Channel Monitor Receiver for WireFree Gen II Assemblies

WirelessHart Network Module Reference


OI-7543-6-X-X-I
WireFree™ 6-Channel Monitor
For Gen II Remote Sensors

The Otis Instruments OI-7543-6 six channel monitor with 3 Dry Contact Relays can monitor up to 6 individual GEN II WireFree sensor assemblies and transmitters. Standard DC or optional AC power option.

An RS-485 Modbus output allows for data communication to a PLC or other system monitoring device. The OI-7543-6 is available with an optional WirelessHART® module that allows the received sensor readings to be viewable on a WirelessHART® network.

The ability to mount the device near the entrance of a site allows the technician to immediately determine if it is safe to enter the site, making this device incredibly useful in any environment hosting hazardous gas.


   Connect up to 6 Otis GEN II WireFree sensor inputs
   Ability for each relay to be latched or non-latched
   Ability to disable alarm relays
   AC or DC power-in option
   Easy radio interface with Otis remote WireFree sensors 
   Rapid response and clearing time
   3 dry contacts for lights & accessories
   Non-intrusive setup with MENU, ADD and SUB buttons

   Optional pre-mounted alarms for quicker, easier installation

   Radio Options:
              Gen II radio 900 MHz, 200mW

               (2.4 GHz ISM, 100mW available for international use)

                                                                                     


OI-7543-6 WireFree 6-Channel Remote Sensor Monitor
Technical Specifications

Enclosure
Fiberglass Enclosure w/ Clear Window
Size & Weight 8 " x 8" x 4" (Max. Dimensions w/ Attachments) | 12.8 lbs
Display 128x64 Resolution Graphical LCD Screen
Transflective (Sunlight Readable) with LED Backlight
Channels

6 Channels with individually configurable set-poiints

Interface 3 Push-Buttons (MENU, ADD, and SUB)
3 Magnetic Non-Intrusive Switches
Networks -52 Networks (GEN II 900 MHz Radio)
78 Networks (GEN II 2.4 GHz Radio)
255 Addresses per Network
Relays 3 Dry-Contact Relays with 4 Amp Replaceable Fuses
Wet Contact Fault Terminal
3 Individually-Configurable Alarm Set-Points/Channel
Latching and Non-Latching Relay Settings/Channel
Output RS-485 Modbus
Optional WirelessHART® Module (disables RS-485 Modbus Output)
Tamb Temperature Range -40° C to 70° C | -40° F to 158° F
Operating Voltage 12V to 35V DC
Power Supply 3.13A (75W), 85/264V AC to 24V DC (Optional)
Current Draw 275 mA Maximum
Radio Options 1.  2.4 GHz ISM, 100mW, 3 miles line-of-sight
2.  900 MHz, 200mW
Radio Transmission Every 1 minute with no change from sensor
Every 5 seconds with change from sensor
Warranty

Hardware: One year (limited)

Part Number Formula OI-7543-6-[Radio]-[Power]-[Enclosure]
OI-7543-6-X-X-I
Optional WirelessHART® Kit OI-HART-KIT - WirelessHART® Module with 2.4 GHz external antenna
Otis WireFree Logo

Otis OI-7543-6 Data Sheet

   OI-7543-6 Manual

For additional accessories & options:  Accessories

CSA Certification Icon
ATEX Certification Icon

Otis Instruments OI-7543 WireFree 6-Channel Monitor

OI-7543-6 WireFree 6-Channel Monitor Diagram

Otis Instruments Replacement Gas Sensors
For Wired or WireFree™ Remote Sensor Assemblies

Part # Description Range Resolution
Accuracy
OI-254-O2 O2, Oxygen 0 - 25% vol 0.1%
± 2%
OI-2018-SB-CB2 LEL, Combustible Gas
(Catalytic Bead) (OI-6000 only)
0 - 100% LEL 1.0% Increments
±1%
OI-140-IR-LEL LEL, Combustible Gas (Infrared)
(OI_6000 only)
0 - 100% LEL 1.0% Increments
± 2%
OI-254-CO CO, Carbon Monoxide 0 - 1000 ppm 0.1 to 10 ppm, 1 ppm thereafter
± 2%
OI-140-IR-CO2 CO2, Carbon Dioxide
(OI-6000 only)
0 - 5% vol 0.1 ppm
± 2%
OI-254-H2S H2S,  Hydrogen Sulfide 0 - 100 ppm 0.1 to 10 ppm, 1 ppm thereafter
± 2%
OI-254-H2S-2K H2S, Hydrogen Sulfide (Ext.Temp) 0 - 2000 ppm 0.1 to 10 ppm, 1 ppm thereafter
± 2%
OI-254-NH3 NH3, Ammonia 0 - 100 ppm 0.1 to 10 ppm, 1 ppm thereafter
± 5%
OI-254-NH3A-N NH3, Ammonia (Ext) 0 - 1000 ppm 0.1 to 10 ppm, 1 ppm thereafter
± 5%
OI-254-Cl2 Cl2, Chlorine 0 - 10 ppm 0.1 ppm
± 5%
OI-254-F2 F2, Florine (Call for availability) 0-1 ppm 0.01 ppm
± 5%
OI-254-CH2O CH2O, Formaldeyde 0-10 ppm 0.01 ppm
± 2%
OI-254-H2 H2, Hydrogen 0- 4% vol 0.1 ppm
± 10%
OI-254-HCL-A HCL, Hydrogen Chloride 0- 100 ppm 0.1 ppm
± 5%
OI-254-HCN-2 HCN, Hydrogen Cyanide 0- 100 ppm 0.1 ppm
± 5%
OI-254-HF HF, Hydrogen Floride 0 - 10 ppm 0.1 ppm
± 10%
OI-254-NO2-N NO2, Nitrogen Dioxide 0-50 ppm 0.1 ppm
± 5%
OI-254-O3 O3, Ozone 0-100 ppm .1 to 10 ppm, 1 ppm thereafter
± 2%
OI-254-SO2 SO2, Sulfur Dioxide 0 - 20 ppm .1 to 10 ppm, 1 ppm thereafter
± 2%
OI-254-PH3-5-5 PH3, Phosphine 0 - 5 ppm 0.1 ppm
± 2%
OI-PID-A1 PID, Photo Ionization Detector for volatile organic compounds (VOCs) 0-2000 ppm 0.1 to 10 ppm, 1 ppm thereafter
± 5%
OI-254-AH PID, Photo Ionization Detector for volatile organic compounds (VOCs)

0-50 ppm

0.1 to 10 ppm, 1 ppm thereafter
± 3%


Note: Other gases and ranges available
. Contact us for additional information

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WARNING! Otis Instruments equipment should only be used in conjunction with the manufacturer's instructions.
Failure to follow such instructions could result in serious injury or fatalities.

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Brandt Instruments, Inc. 
    18568 Oak Grove Parkway 
    Prairieville, LA  70769 
1-800-337-6291  
Phone: 225-673-6776
    Fax: 225-673-6725
 

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