Figure 1-1. Control Drawing Showing An Example TLS-IB System Site Layout
MP
MP
Non-Hazardous Area
120 OR 240 VAC
MP
Magnetostrictive Probe
Hazardous
Area
DISPENSERS
Forecourt
Epoxy Sealed Connection in
a Weatherproof Junction Box
Seal-Off
LEGEND
Rigid Conduit (Ducting)
IS
IS
PA
Conduit Enters Console in an
Intrinsically Safe Area Knockout
Conduit Enters Console in a
Power Area Knockout
IS
PA
Product piping
Double Wall Tank
Single Wall Tank
Single Wall Tank
MP
DP
Intrinsically safe wiring shall be installed in accordance with Article
504-20 of the latest National Electrical Code (NFPA 70).
Note: Conduit (ducting) requirements are dependent on local electrical
regulations. For probe-to-console wiring, shielded cable is required
regardless of conduit requirements.
Circuitry within the TLS-IB Console barrier forms an intrinsically safe,
energy-limited sys
tem. This system makes TLS-IB probes safe for use
in a Class I, Group D hazardous location. TLS-IB probe wiring is
intrinsically safe only when connected to Veeder-Root's TLS-IB
Consoles. Reference Form Number 8466 TLS-IB Console and Form
Numbers 8462, 8463, 8473, and 8493 (Probes).
Circuit breaker panel
or Fused, switched,
neon indication spur
WARNING
Substitution of components may
impair intrinsic safety.
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