MSA IR5500 Installation Manuallines

Installation Guidelines—
IR5500 Open Path Gas Detector
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Location
Factors to consider when selecting locations:
• It is recommended to install the detector on a solid foundation not prone to future ground settling.
• The system should be accessible for occasional response checks.
• The Receiver and Source should be mounted so that the display is visible to aid in alignment.
• Install in low traffic areas—the line of sight between the Source and Receiver should be free from obstructions such as:
- Parked vehicles or moveable machinery
- Frequent operator traffic or animal crossings
• Although the Source and Receiver are designed to resist radio frequency interferences, they should not be mounted close
to radio sources, near strong magnetic fields or around concentrated sources of heat (i.e. boiler, engine).
• There should be a 3 ft clearance around both the Source and Receiver free from piping, the ground etc.
• Highly reflective surfaces can interfere with units placed in close enough proximity.
• Although the IR5500 is FM 6325 approved, which ensures vibration tolerance, it is recommended to mount away from sources
of excessive vibration and away from high voltage/high current power lines.
• Avoid process areas that release vented gas or steam.
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Power & Wiring Requirements
Power Requirements
The IR5500 Open Path Gas Detector is powered
by 24 VDC ± 10% operating.
Electrical Recommendations
INPUT POWER 20–36 VDC range
SOURCE 24 VDC @ 12 W (max.)
RECEIVER (W/RELAYS) 24 VDC @ 10 W (max.)
Cable Requirements
Customers must derive the distance from power supply to device based on cable specifications, expected maximum ambient
temperature and cable temperature rise, estimated connection losses, allowances for error in distance measurement, and other
variables particular to the customer installation.
Sample distances from power supply to Source and Receiver:
Terminal Type Push
MAX WIRE SIZE 16 AWG
1.5 mm
5.00 ohms/1,000 ft
TYPICAL RESISTANCE
16.0 ohms/1,000 m
625 ft
SOURCE
195 m
RECEIVER 800 ft
250 m
Screw
14 AWG
2 2.5 mm 2
3.00 ohms/1,000 ft
9.00 ohms/1,000 m
1,040 ft
347 m
1330 ft
444 m
If the units do not receive adequate power, this can affect unit
performance and have the potential to cause erroneous behavior.
Source
0.64 A maximum
OPERATING
at 20 VDC input voltage
IN-RUSH* 1.66 A maximum
at 36 VDC
* In-Rush refers to the instantaneous input current drawn by the device when first turned on
Sample distances from Receiver to analog output load:
AWG Ohms/1,000 ft
#20 11
#18 7
#16 5
Failure to use shielded cable
or poor earth grounding will result
in poor product performance.
Because every life has a purpose...
Receiver
0.50 A maximum
at 20 VDC input voltage
1.3 A maximum
at 36 VDC
Feet Meters
4550 1,390
7140 2,180
10,000 3,050