3
CONTROL DRAWING for Industrial ETHERNET
Rail Switch 2 and Rail Transceiver 2 Family
According to ANSI / ISA 12.12.01-2012
Rev.: 0 Date: 2012-07-13
Document No.: 000163806DNR
Page 1 of 1
NON HAZARDOUS LOCATION
Power Supply: (Redundant: P1, P2)
24
V
DC
Relay Contacts:
Associated Apparatus:
Equipment with nonincendive
fi eld wiring
1
HAZARDOUS LOCATION Class
I, Division 2 Groups A, B, C, D
The Use in Hazardous Locations is only allowed for Rail Switch 2 and Rail Transceiver 2 Family model No‘s which are individually labelled
“
FOR USE IN CLASS I, DIVISION 2 HAZARDOUS LOCATIONS
”
Notes:
The nonincendive fi eld wiring circuit concept allows interconnection of nonincendive fi eld wiring apparatus and associated nonincendive
fi eld wiring apparatus using any of the wiring methods permitted for unclassifi ed locations when certain parametric conditions are met
Capacity:
Ca ≥ Ci + CCable
Inductivity:
La ≥ Li + LCable
The maximum cable length has to be determined as follows:
(a) max. Cable Length < (La - Li) /
LCable
and (b) max. Cable Length < (Ca - Ci) /
CCable
The lower value of (a) and (b) is to apply.
CableL: inductance per unit length of used cable.
CableC: capacitance per unit length of used cable.
Other C-parameters and L-parameters are according to ANSI / ISA 12.12.01-2012 section 7.
Where cable capacitance and inductance values per foot are not known, the following values shall be used:
CCable
60 pF/foot,
LCable
0.2 µH/foot
Nonincendive fi eld wiring circuits must be wired in accordance with the National Electric Code (NEC), NFPA 70, article 501.
1
Nonincendive Field Wiring Parameters:
The Relay Contacts are dependent upon the
following Entity Parameters:
V
max
I
max
C
i
L
i
30 V
90 mA
2.5 nF
1 µH
WARNING – EXPLOSION HAZARD – SUBSTITUTION OF ANY COMPONENTS MAY IMPAIR SUITABILITY FOR HAZAR-
DOUS LOCATIONS OR EXPLOSIVE ATMOSPHERES.
WARNING – EXPLOSION HAZARD – DO NOT DISCONNECT EQUIPMENT UNLESS POWER HAS BEEN SWITCHED OFF OR
THE AREA IS KNOWN TO BE NON-HAZARDOUS.
DO NOT OPEN WHEN ENERGIZED.
Relay Contacts:
Associated Apparatus:
Equipment with nonincendive
fi eld wiring
1
Power Supply: (Redundant: P1, P2)
24
V
DC
Detail: RS2-xxx
Detail: RT2-xxx
The equipment must be installed in a tool-locked enclosure.
