Ashcroft A4 - Pressure Transmitter - Manual (Page 2)

© 2011 Ashcroft Inc. All rights reserved. 250 East Main Street, Stratford, CT 06614 USA Tel: 203-378-8281, Fax: 203-385-0402 www.ashcroft.com
All sales subject to standard terms and conditions of sale. I&M011-10166-A4. Rev. 12/12
HAZARDOUS (CLASSIFIED) AREA
CLASS I, DIVISION 1 & 2,
GROUPS A, B, C, & D;
CLASS II, DIVISION 1 & 2,
GROUPS E, F & G, CLASS III
NON-HAZARDOUS
(UNCLASSIFIED) AREA
BARRIER
BARRIER
V+
V–
MODEL A2X & A4 SERIES
4-20MA TRANSMITTER
R LOAD
250 OHM
TYP.
R LOAD
250 OHM
TYP.
MODEL A2X & A4 SERIES
4-20MA TRANSMITTER
V+
V–
+24 VDC TYP.
+
–24 VDC TYP.
–
V OUT
(1-5 V TYP.)
V OUT
(1-5 V TYP.)
4.3 FM INSTALLATION GUIDELINES
NSTALLATION NOTES ≥
Voc OR Vt ≤30VDC
Isc OR It ≤100mA
Ca ≥ 0.053uF + Ccable
La ≥ 0.364uH + Lcable
1. THE INTRINSIC SAFETY ENTITY CONCEPT ALLOWS THE INTER-
CONNECTION OF TWO INTRINSICALLY SAFE DEVICES FM
APPROVED WITH ENTITY PARAMETERS NOT SPECIFICALLY
EXAMINED IN COMBINATION AS A SYSTEM WHEN: Uo OR Voc
OR V
≤t Vmax, Io OR Isc OR≤ It Imax, Ca OR Co ≥ Ci + Ccable, La
OR ≥Lo Li +Lcable≤, Po Pi.
2. THE NONINCENDIVE FIELD WIRING CONCEPT ALLOWS INTER-
CONNECTION OF NONINCENDING FIELD WIRING APPARATUS
WITH ASSOCIATED NONINCENDIVE FIELD APPARATUS USING
ANY OF THE WIRING METHODS PERMITTED FOR NON3HAZ-
ARDOUS (UNCLASSIFIED) LOCATIONS WHEN: Uo OR Voc OR Vt
Vmax, Io OR Isc OR It Imax, Ca OR Co + Ccable, La OR Lo Li
+Lcable, Po Pi.
3. FOR DIVISION 1 INSTALLATIONS, THE CONFIGURATION OF
ASSOCIATED APPARATUS SHALL BE FM APPROVED UNDER
ENTITY CONCEPT.
4. FOR DIVISION 2 INSTALLATIONS USING NONINCENDIVE FIELD
WIRING CONCEPTS THE ASSOCIATED APPARATUS SHALL BE FM
APPROVED UNDER THE ENTITY CONCEPT OR NONINCENDIVE
FIELD WIRING CONCEPT.
INSTALLATION FOR FM
INTRINSICALLY SAFE CLASS 1, GROUPS A, B, C & D &
CLASS ll, GROUPS E, F & G &
CLASS lll
5. FOR DIVISION 2 INSTALLATIONS THE ASSOCIATED APPARATUS
IS NOT REQUIRED TO BE FM APPROVED UNDER ENTITY CON-
CEPT OR NONINCENDIVE FIELD WIRING CONCEPT IF THE
A2X(4-20mA) & A4 SERIES PRESSURE TRANSDUCER IS
INSTALLED IN ACCORDANCE WITH THE NATIONAL ELECTRICAL
CODE (ANSI/NFPA 70) FOR DIVISION 2 WIRING METHODS
EXCLUDING NONINCENDIVE FIELD WIRING.
6. CONTROL EQUIPMENT CONNECTED TO THE ASSOCIATED APPA-
RATUS SHALL NOT USE OR GENERATE MORE THAN 250VRMS
OR VDC.
7. DIVISION 1 INSTALLATIONS SHOULD BE IN ACCORDANCE WITH
ANSI/ISA RP12.06.01, ``INSTALLATION OF INTRINSICALLY SAFE
SYSTEMS FOR HAZARDOUS (CLASSIFIED) LOCATIONS'' AND
THE NATIONAL ELECTRICAL CODE (ANSI/NFPA 70).
8. ASSOCIATED APPARATUS MANUFACTURERS INSTALLATION
DRAWING SHALL BE FOLLOWED WHEN INSTALLING THIS
EQUIPMENT.
9. RUN SHIELDED INTERCONNECTION CABLE WITH SHIELD CON-
NECTED TO FM APPROVED ASSOCIATED APPARATUS GROUND.
10. WARNING – DO NOT OPEN WHEN ENERGIZED.
11. WARNING – DO NOT DISCONNECT EQUIPMENT UNLESS AREA IS
KNOWN TO BE NON-HAZARDOUS.