Detcon FP-624D-HT Manual de usuario descargar pdf (Pagina 14)

Model FP-624D-HT

FP-624D-HT Instruction Manual Rev. 1.1 Page 10 of 44

Figure 9 Typical Installation

NOTE:

Any unused ports should be blocked with suitable ¾” male NPT plugs. Detcon

Supplies one ¾” NPT male plug with each J-box enclosure. If connections are other than ¾”

NPT, use an appropriate male plug of like construction material.

2.6 Field Wiring

Detcon Model FP-624D-HT High Temperature combustible gas sensor assemblies require up to five conductor

connections between power supplies and host electronic controller. Wiring designations are DC+, DC-, MA

(sensor signal), Modbus A and Modbus B. If the MA signal is not needed, its terminal may be left

unconnected. A 250 ohm load resistor is needed on the 4-20 mA line when it is not being used. The

maximum wire length between sensor 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 needed on the 4

20 mA line when it is not being used.

Drain

Conduit

"T"

EYS Seal Fitting

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 47 48

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