Industrial VRS Magnetic Speed Sensors
CONTROL DRAWING FOR DUAL CHANNEL BARRIERS
Non-hazardous Location
Hazardous Location
Speed Sensor
Ground
Intrinsic Safety Barrier
.
HAZARDOUS LOCATIONS
Catalog listing 3042H20:
Class I, Groups A, B, C, D
Class II, Groups E, F, G
Class III
GENERAL NOTES
1. For jurisdictions requiring certification to the applicable
Canadian standards, the barrier must be CSA Certified
and the system must be installed in accordance with the
Canadian Electrical Code Part 1.
2. For jurisdictions requiring Certification to the applicable
Occupational Safety and Health Administration (OSHA)
standards, the barrier must be CSA NRTL or equivalent
and the system must be installed in accordance with the
National Electrical Code (NEC), article 504 or
ANSI/NFPA 70.
Catalog listing 3042A:
Class I, Groups A, B, C, D
ENTITY PARAMETERS
Vmax = 24 V, Imax = 35 mA, Li = 26 mH, Ci = 0 μF
Any barrier (see General Notes) with entity parameters
connected in accordance with barrier manufacturers
instructions of:
SENSOR GROUNDING
Catalog listing 3042A: Sensor housing must be connected to
intrinsically safe system ground during installation.
Vmax > Voc
Imax > Isc
Ca > Ci + cable capacitance
La > Li + cable inductance
Catalog listing 3042H20: Green wire must be connected to
intrinsically safe system ground.
SYSTEM PARAMETERS
Any barrier (see General Notes) having one of the following
specified parameters:
Exia = Intrinsically Safe, Sécurité Intrinsèque
Vmax
30
Rmin
1414
1160
Vmax
20
Rmin
842
Vmax
10
Rmin
272
2
25
15
556
5
Honeywell Sensing and Control
7
HONEYWELL [ Honeywell ]
