Vega FiberFlex LFXG-H, Руководство по эксплуатации

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Installation
LFXG-H Installation and Operation Guide 37
AC power must not be shared with transient-producing loads. Use an
individual AC lighting circuit. Supply a separate earth ground.
The DC power source voltage input is 20 – 60 VDC (< 100 mV, 1/1,000 Hz
ripple) at 15 VA maximum power consumption. DC power cable can be part
of a single cable 4-wire hookup, or can be separate from output signal
cable. (See “Output current loop” section.)
Use wire for power per local code. Use supply wire suitable for +40 °C
(+140 °F)above surrounding ambient temperature. All field wiring must have
insulation suitable for 250 volts or higher.
Switch for CE compliance
For CE compliance, install a power line switch

1 m from the operator’s
control station.
Output current loop
Output signal is 4 ... 20 mA into 250 – 800

. Pin 13 is + and Pin 14 is -.
HART communication protocol (BEL202 FSK standard) is available on
these connections. The output is isolated to standard ISA 50.1 Type 4 Class
U.
When using signal (current loop or 4 ... 20 mA output) cables that VEGA did
not supply, they must meet these specifications:
• Maximum cable length is 1,000 m (3,280')
• All wires should be per local code
When using DC power, the signal and power can run on a single cable 4-
wire hookup
(2 wires for power, 2 for 4 ... 20 mA).
Relay
Use relay contacts rated at 6 A at 240 VAC, 6 A at 24 VDC, or 1/4 HP at
120 VAC. Frequency input signal is 0/100 kHz

, true digital.
Note: HART signal may not operate with some isolating barriers or
other non-resistive loads.