Nameplates; Front Cover Nameplate; Back Cover Nameplate; Antenna Rf Power Calculation - United Electric Controls VANGUARD Installation And Operation Instruction Manual
Wirelesshart toxic & combustible gas detector
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7.0 NAMEPLATES
7.1 Front Cover Nameplate
1. WARNING: DO NOT OPEN WHEN EXPLOSIVE
ATMOSPHERE IS PRESENT. KEEP COVER TIGHT WHILE IN
OPERATION
1. AVERTISSEMENT : NE PAS OUVRIR EN PRÉSENCE D'UNE
ATMOSPHÈRE EXPLOSIVE. GARDER LE COUVERCLE FERMÉ
PENDANT LE FONCTIONNEMENT
2. WARNING – POTENTIAL ELECTROSTATIC CHARGING
HAZARD – SEE INSTRUCTIONS
2. AVERTISSEMENT - DANGER POTENTIEL DE CHARGE
ÉLECTROSTATIQUE - VOIR INSTRUCTIONS
7.2 Back Cover Nameplate
3. WARNING: REFERENCE INSTALLATION MANUAL FOR
GUIDANCE ON COMPATIBILITY OF INTRINSICALLY SAFE
HART DEVICES.
3. AVERTISSEMENT: CONSULTER LE MANUEL
D'INSTALLATION POUR OBTENIR DES CONSEILS SUR
LA COMPATIBILITÉ DES DISPOSITIFS HART À SÉCURITÉ
INTRINSÈQUE.
4. WARNING: TO PREVENT IGNITION, USE ONLY SENSORS
AND BATTERIES SUPPLIED BY UNITED ELECTRIC CONTROLS.
USE UE BATTERY (VMAX = 7.8V, IMAX = 0.17A) ASSY # 6361-807.
4. AVERTISSEMENT: POUR ÉVITER TOUTE INFLAMMATION,
N'UTILISEZ QUE DES CAPTEURS ET DES BATTERIES FOURNIS
PAR UNITED ELECTRIC CONTROLS. UTILISEZ LES BATTERIES
UE (VMAX = 7,8V, IMAX = 0,17A) ASSY # 6361-807.
8.0 ANTENNA RF POWER CALCULATION
Calculating Maximum Joules for Adding Cable to
Output of Coupler:
Formula Setup:
E = ½ * (C * (1.5 * V)
)
2
Where:
C = RX Capacitance + Input cable Capacitance + Antenna
cable Capacitance
V = Voltage
Safety Factor = 1.5
Example:
RF Radio Power = 2 Watts or less = 10 Volts
Antenna cable LMR400 length 50 feet = 1195 pF
RX (L) Coupler capacitance = 18 PF
Input cable capacitance = 73 PF
Total Capacitance C = 1286 pF
E = ½ * (1286 pF * (1.5 * 10)
Answer = 0.144 μJ acceptable for any Group
) = 0.144 μJ
2
18
NOTES (unless otherwise specifi ed):
1. Cable requirements: Max. capacitance: 6 pF/FT -
Max. inductance: 2 μh/FT
2. Material shall not contain, by mass, more than 7.5%
in total of Magnesium, Titanium and Zirconium.
3. Copper or Copper alloys shall be coated with
Tin, Nickel or by other coatings or shall have the
maximum Copper content of the alloy limited to 60%.
CABLE CONNECTS
TO THE ANTENNA
CABLE
IMPEDANCE (Ω)
LMR-100 OR RG-316
LMR-195 OR RG-58
LMR-200
LMR-240 OR RG-8
LMR-300
LMR-400 OR RG-213, 214
LMR-500
LMR-600
LMR-900
LMR-1200
LMR-1700
NOTE: For cables other than listed above, consult with
manufacturers specifi cation sheets for capacitance values.
RF RADIO POWER
IMPEDANCE
2 ≥
3.5 ≥
6 ≥
ANTENNA
CONNECTOR
MATERIAL: SEE
NOTES 2&3
NON-ARMORED CABLE
ASSEMBLY, MAX. 50 FT
MATERIAL: PER INDUSTRY
STANDARD IN TABLE 13
CONNECTOR
MATERIAL: SEE
NOTES 2&3
CABLE CONNECTS TO THE
SOLEXY COUPLER
Figure 46
CAPACITANCE
PER FOOT (pF)
50
29
50
25.4
50
24.5
50
24.2
50
23.9
50
23.9
50
23.6
50
23.4
50
23.4
50
23.1
50
22.8
Table 13
VOLTAGE ( √ ΩW )
50
10
50
13.25
50
17.5
Table 14
IM_TCD60 02
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