Detcon FP-624D Manual do Utilizador descarregar pdf (Página 14)

Model FP-624D

FP-624D Instruction Manual Rev. 1.2 Page 10 of 42

and 24VDC source is shown in the Table below. The maximum wire size for termination in the Junction Box

is 14 AWG.

Table 1 Wire Gauge vs. Distance

AWG Wire Dia. Meters Feet

Over

Current

Protection

0.723mm

700

2080

0.812mm

1120

3350

1.024mm

1750

5250

1.291mm

2800

8400

10A

1.628mm

4480

13,440

20A

NOTE 1:

Wiring table is based on stranded tinned copper wire and is designed to serve as a

reference only.

NOTE 2:

Shielded cable is required for installations where cable trays or conduit runs include

high voltage lines or other possible sources of induced interference. Separate conduit runs are

highly recommended in these cases.

NOTE 3:

The supply of power shou

ld be from an isolated source with over

current protection

as stipulated in Table 1 Wire Gauge vs. Distance.

NOTE 4:

A 250 ohm load resistor is need

ed on the 4

20 mA line when it is not being used.

Terminal Connections

CAUTION: Do not apply System power to the sensor until all wiring is properly terminated. Refer

to Section 2.8 Initial Start Up

Figure 11 Sensor Connector PCB

a) Remove the junction box cover and unplug the Transmitter Module. Identify the terminal blocks for

customer wire connections.

Customer

Wiring

White

Blue

Yellow

Black

Wiring to

LEL Sensor

Power (+ -)

4-20 mA

RS-485 (A,B)

Fault

Alarm 2

Alarm 1

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 45 46

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