Detcon FP-624D Bedienungsanleitung PDF herunterladen (Seite 7)

Model FP-624D

FP-624D Instruction Manual Rev. 1.2 Page 3 of 42

Figure 4 Response Curves

1.2 Modular Mechanical Design

The Model FP-624D Sensor Assembly is completely modular and is made up of four parts:

1) FP-624D Plug-in Transmitter

2) Field Replaceable Combustible Gas Sensor

3) Connector PCB

4) Splash Guard

FP-624D Plug-in Transmitter

The Plug-in Transmitter Module is a microprocessor-based package that plugs into the connector board located

in the explosion proof junction box. Circuit functions include extensive I/O circuit protection, sensor pre-

amplifier, sensor temperature control, on-board power supplies, microprocessor, LED display, magnetic

programming switches, a linear 4-20mA DC output, and a Modbus RTU output. Magnetic program switches

located above and below the LED Display are activated via a hand-held magnetic programming tool, thus

allowing non-intrusive operator interface with the Transmitter Module. Calibration can be accomplished

without declassifying the area. Electrical classifications are Class I, Division 1, Groups B C D.

Figure 5 Circuit Functional Block Diagram

I/O

Circuit

Protection

485

20mA

Display

Micro-

Processor

Temperature

Control

Pre

Amp

Analog 4-20mA Out

Power In

Power Supply

Plug-In

Sensor

Element

Modbus RTU

Relays Out

1 2 3 4 5 6 7 8 9 10 11 12 ... 45 46

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Detcon FP-624D Bedienungsanleitung Seite 7