Analytical Industries GPR-7500 AIS Trace PPM Hydrogen Sulfide Analyzer - Manual (Page 15)

Advanced Instruments, Inc.
15
Electrical Connections
The Incoming power, alarm relays, and signal output connections are made to terminal blocks mounted on a
PCB located in the explosion proof enclosure.
Do not supply voltage above the noted value in
this manual and noted near the
power input terminal of the
analyzer.
The PCB in the explosion proof
enclosure contains a power limiting intrinsic safety
barrier that limit the total power available at the
PCB electronics mounted in the general purpose
enclosure.
With proper insulation of the incoming power, this configuration of the GPR-7500AIS conforms to the ATEX
directives for equipments for use in hazardous area. The analyzer meets the following area classification:
The GPR-7500AIS also meets the intrinsic safety standards required for use in Class 1, Division 1, Group C,
D hazardous areas.
The A-1166-H2S A IS PCB in the Ex enclosure contains two fuses, one plug-in (brown color)
rated at 50 mA and the second mounted on the PCB (after the DC voltage is regulated to lower
safe value, this fuse meets barrier network standard EN 50020).
Avoid electrostatic discharge – Clean all surfaces with a damp cloth only.
1 A Fuse
Analyzer ground terminal must be
connected to ground
Power In Alarms Signal Out