Quick Start Guide Owner manual

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www.detcon.com service@detcon.com 713.559.9200 FP-524D Quick Start Guide April 23, 2014 • Document #4462 • Revision 1.1

Detcon Quick Start Guide

Model FP-524D

Combustible Gas Sensor (0-100% LEL)

CAUTION

If equipment is used in a manner not specified by Detcon, the protection provided by

the equipment may be impaired. Applying power with devices hooked up incorrectly

may cause damage to the equipment.

General Installation Notes

 Install the sensor only in areas with classifications matching the approval label, and in compliance with local

electrical codes.

 Follow all warnings listed on the label.

 Mount the FP-524D vertically, with sensor facing down. Locate the sensor with due consideration for the

properties of the gas to be detected, likely sources, ventilation, personnel exposure, and maintenance access.

 Ensure that the housing bottom and plug-in sensor are installed during operation. The housing bottom should be

threaded tightly to the sensor housing.

Field Wiring Mounting Installation

After mounting the FP-524D vertically with the sensor pointing straight down, mount the explosion-proof enclosure or

junction box on a wall or pole. When mounting on a pole, secure the junction box to a suitable mounting plate and

attach the mounting plate to the pole using U-bolts.

NOTE

Do not use Teflon tape or any other type of pipe thread material on the ¾-in. threads unless the

unit is mounted in a severe or harsh environment. Metal-on-metal contact must be maintained to

provide a solid electrical ground path. If Teflon tape is used, the sensor must be externally

grounded using a ground strap.

Sensor Connector PCB

NOTE

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

The supply of power should be from an isolated source with over-current protection.

CAUTION

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

1. Remove the junction box cover and unplug the Transmitter Module.

2. Observing correct polarity, terminate the three-conductor 4-20mA field wiring (DC+, DC-, and MA) to the sensor

assembly wiring in accordance with the detail shown in Figure 1.

Customer

Wiring

White

Blue

Yellow

Black

Wiring to

LEL Sensor

Power

Ground

Figure 1 FP-524D Sensor Connector PCB

NOTE

A 6-32 or 8-32 threaded exterior ground point is provided on most junction boxes for an external

ground. If the Sensor Assembly is not mechanically grounded, an external ground strap must be

used to ensure that the sensor is electrically grounded.

3. Trim and cap all exposed wire leads if they are not permanently landed in the terminal board.

4. Plug the Transmitter Module into the connector PCB and replace the junction box cover.

Remote Mounting Installation

NOTE

If using the FP-524D remote-mount configuration (sensor model FP-524D-RS and transmitter

model FP524D-RT), follow the specifications for maximum separation in Table 1 and refer to the

Summary of content (2 pages)

PAGE 1
Detcon Quick Start Guide Model FP-524D Combustible Gas Sensor (0-100% LEL) If equipment is used in a manner not specified by Detcon, the protection provided by the equipment may be impaired. Applying power with devices hooked up incorrectly CAUTION may cause damage to the equipment. General Installation Notes     Install the sensor only in areas with classifications matching the approval label, and in compliance with local electrical codes. Follow all warnings listed on the label.
PAGE 2
wiring diagram in Figure 2. There is a limit 0.5-ohm maximum resistance drop per wire over the separation distance. Table 1 FP-524D Remote Sensor Maximum Separation AWG 20 18 16 14 Maximum Separation (feet) 50 75 125 175 Remote Sensor FP-524D-RS Plug unused port with 34" NPT plug Blue White Black Remote Transmitter FP-524D-RT Install Jumper Blue White Black Yellow Blue Black White Measure Bridge Voltage From White (1) to Blue (4) Target Voltage is 2.