HAZARDOUS AREA
Class I, Groups A, B, C, D
Class I, Groups E, F, G
PRESSURE TRANSMITTER
0 PXMS SERIES
SAFE AREA
POWER BARRIER A
Voc 28 V
BUSBAR Isc 93 mA
CEE са [012 uF
77 La | 3 mH
CONTROL EQUIPMENT
V SUPPLY
FO A ho HO O MUST NOT BE CONNECTED TO
EQUIPMENT WHICH USES OR
GENERATES MORE THAN
250 VRMS WITH RESPECT TO
POWER RETURN EARTH GROUND
ZN
BF.
TRANSMITTER ENTITY
PARAMETERS
TERMINALS VMAX IMAX Cl u
POS — NEG| 28 V 93 mA |0.11 ДР [0.22 mH
Vmax >= Voc
| max >= |sc
Ci + C cable =< Ca
Li + L cable =< La
USE THE FOLLOWING PARAMETERS IF CABLE
PARAMETERS ARE UNKNOWN.
CABLE CAPACITANCE: 60 pF/ft
(EX.Ccable=1000ft x 6OpF/ft=0.06uF)
CABLE INDUCTANCE: 0.2uH/ft
(EX.Lcable=1000ft x 0.24H/ft=0.2mH)
ALL INTRINSICALLY SAFE WIRING
SHALL BE KEPT SEPARATE FROM
NON-INTRINSICALLY SAFE WIRING.
REFER TO ARTICLE 504 OF THE
NATIONAL ELECTRICAL CODE OR THE
CANADIAN ELECTRICAL CODE.
BARRIER NOTES
> O 1 OUTPUT CURRENT MUST BE LIMITED BY A
RESISTOR SUCH THAT THE OUTPUT VOLTAGE
| Vs CURRENT PLOT IS A STRAIGHT LINE
BETWEEN Voc AND Isc
AZ TT en
ZA
SELECTED BARRIER INTRINSICALLY SAFE
CIRCUITS SHALL BE APPROVED FOR
CLASS |, Il, ll DIV 1 de 2, GROUPS A-G
= TERMINATE BARRIER EARTH GROUND TO THE
= GROUND BUS OF THE POWER DISTRIBUTION
EARTH GND PANEL. RESISTANCE TO GROUND MUST NOT
BE GREATER THAN 1 OHM
a
»
D | ADD POWER BARRIER TABLE. REV FROM PXM
TO PXMS.
06/04/99 CB ER#99-0564 CB
REV. CHANGES MADE
murphy,
DRAWN BY: MLM | ER.NO. 95-0142
DATE: 2/6/95 | CHKD. BY: RJ | APPD. BY: DR
A MODEL: PXMS INSTALLATION
DIAGRAM
DRAWING NO. SIZE | REV.
05-08-0006 В | р
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