Invensys Sensor Systems / Electro Corporation, U.S.A.
Tel. 941-355-8411 www.speed-position.invensys.com Fax 941-355-3120 ISO
9001
3042 SERIES I.S. CONTROL DRAWING 621081
HAZARDOUS LOCATIONS
Class I, Groups A, B, C, D; Class II, Groups E, F, G;
Class III: Sensor Models 3042H20 and M3042H20
Class I Groups A, B, C and D: Sensor Models 3042A and
M3042A
ENTITY PARAMETERS
Vmax = 24V, Imax = 35mA, Li = 26mH, Ci = OuF
Any barrier (see General Notes) with entity parameters
connected in accordance with barrier manufacturers
instructions of:
V max Voc Ca Ci + cable capacitance
I max Isc La Li + cable inductance
SYSTEM PARAMETERS
Any barrier (see General Notes) having one of the following
specified parameters:
Vmax Rmin Vmax Rmin Vmax Rmin
30 707 20 421 10 136
25 580 15 278 5 1
GENERAL NOTES
1. For jurisdictions requiring Certification to the applicable
Canadian Standards the barrier must be CSA Certified
and 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 system must be installed in accordance with the
National Electrical Code (NEC) article 504 or
ANSI/NFPA 70.
SENSOR GROUNDING
Models 3042A and M3042A: Sensor housing to be connect-
ed to intrinsically safe system ground during installation.
Models 3042H20 and M3042H20: Green wire to be
connected to intrinsically safe system ground
Exia = Intrinsically Safe, Securite Intrinseque
For Single Channel Barriers For Dual Channel Barriers
HAZARDOUS LOCATIONS
Class I, Groups A, B, C, D; Class II, Groups E, F, G;
Class III: Sensor Models 3042H20 and M3042H20
Class I Groups A, B, C and D: Sensor Models 3042A and
M3042A
ENTITY PARAMETERS
Vmax = 24V, Imax = 35mA, Li = 26mH, Ci = OuF
Any barrier (see General Notes) with entity parameters
connected in accordance with barrier manufacturers
instructions of:
V max Voc Ca Ci + cable capacitance
I max Isc La Li + cable inductance
SYSTEM PARAMETERS
Any barrier (see General Notes) having one of the following
specified parameters per channel:
Vmax Rmin Vmax Rmin Vmax Rmin
30 1414 20 842 10 272
25 1160 15 556 5 2
GENERAL NOTES
1. For jurisdictions requiring Certification to the applicable
Canadian Standards the barrier must be CSA Certified
and 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 system must be installed in accordance with the
National Electrical Code (NEC) article 504 or
ANSI/NFPA 70.
SENSOR GROUNDING
Models 3042A and M3042A: Sensor housing to be connect-
ed to intrinsically safe system ground during installation.
Models 3042H20 and M3042H20: Green wire to be
connected to intrinsically safe system ground
Exia = Intrinsically Safe, Securite Intrinseque