Det-Tronics TXL Series Gas Transmitter - Manual (Page 12)

10 95-8541 1.1
3 4
+ -
2 1
DRAWING NUMBER DRAWN BY: APPROVED BY: DATE:
SCALE: TOLERANCES
(EXCEPT AS NOTED)
ANGULAR
TITLE MATERIAL
P.C.
P.010
N.A
NTS
A.P.C.
P-1115
REV
DATE
SYM
REVISION DIRECTIVE
DR.
APP. A
5/21/02 N.A.
REV
5/21/02
0.1
NEW DRAWING
AC
+ 24VDC - P5%
CONTROL DRAWING
+ -
+ -
+ -
<
<
< <
2 1
2 1
REMOTE SENSOR SERIES
CALCULATE CABLE PARAMETERS:
Ci=0 Li=0
5/21/02
A
RELEASED DRAWING
AC
JS
TXL-PH3 TXL-HCN TXL-NH3 TXL-CLO2 TXL-NO2 TXL-SO2 TXL-H2S TXL-CL2 TXL-CO MODEL: TXL-02 TXL-H2S1 TXL-H2S2
Suggested Manufacturer = R. Stahl Inc.
Model No's 9002/13-280/110/00 or
9002/13-252/121/04
Barrier Specifications:
The shortest of these two distances is the maximum distance. Note: If cable parameters are unknown 60pf/ft and 0.20uh/ft must be used to calculate maximum distance. Because of circuit limitations, do not run cable in excess of 4,000ft even if the above formulas allow a longer length.
a. Use general purpose enclosures meeting requirements of ANSI/ISA S82 for use in nonhazardous or Class I, Division 2, Groups A,B,C and D Hazardous Locations. b. Use a UL Listed or NRTL approved Dust-tight enclosure appropriate for environmental protection in Class II, Division 2, Groups F and G; and Class III,Division 2 Hazardous Locations.
3. Barrier Enclosures: 2. Installation should be in accordance with the barrier manufacturers instructions and with Article 504/505 in the National Electrical Code, ANSI/NFPA 70. 1. Electrical apparatus connected to an intrinsically safe system must not use or generate more than 250V, (Vrms), with respect to earth ground.
Voc Vmax = 30vdc Isc Imax = 125ma
Ca Ci+C cable La Li+L cable
SEE NOTE 1
Notes:
(SEE SPECIFICATIONS AND NOTE 2) ZENER DIODE BARRIER DIN Rail
CONTROLLER APPARATUS
I.S. Ground Conductor
CONDUIT
TO MAINTAIN INTRINSIC SAFETY, THE TRANSMITTER WIRING MUST BE ROUTED THROUGH A ZENER DIODE BARRIER WHICH MEETS THE ENTITY PARAMETERS SHOWN ABOVE. THE SELECTED BARRIER SHALL BE APPROVED WITH INTRINSICALLY SAFE CIRCUITS FOR THE HAZARDOUS LOCATION CLASS & GROUP AS APPROPRIATE FOR THE APPLICATION. THE CABLE CAPACITANCE PLUS THE TRANSMITTER CAPACITANCE(Ci) MUST BE LESS THAN OR EQUALTO THE Ca ON THE BARRIER. THE CABLE INDUCTANCE PLUS THE TRANSMITTER INDUCTANCE(Li) MUST BE LESSTHAN OR EQUAL TO THE La ON THE BARRIER. THE BARRIER MUST BE LOCATED IN THE NON-HAZARDOUS AREA AS SHOWN.
-WARNING-
1. Calculate "C cable" = 2. Calculate "L cable" =
Ca on barrier Cable Capacitance/ft
: MAXIMUM DISTANCE
La on barrier cable inductance/ft
:
MAXIMUM DISTANCE
(Note: Because Ci=0 and Li=0, they are not part of this formula)
ALL INTRINSICALLY SAFE WIRING SHALL BE KEPT SEPARATE FROM NON- INTRINSICALLY SAFE WIRING. TERMINATE BARRIER EARTH GROUND TO THE GROUND BUS OF THE POWER DISTRIBUTION PANEL (CONTROLLER). RESISTANCE TO GROUND MUST NOT BE GREATER THAN 1.0 OHM.
-WARNING-
Zone 0 IIC
Locations or Class I,
Groups A-G Hazardous
Class I,II,III, Division 1,
HAZARDOUS LOCATION
NONHAZARDOUS LOCATION
CONTROL DRAWING
N.A.
Control Drawing No. P-1
1
1
5