Instala�On, Assembly And Disassembly Of The Detector; Assembly Of The Detector - DEGA NS III LCD Instruction Manual

1
Moun�ng holes
Body of the
5
removable sensor
Terminal block
9
RS485 A
13
Expanding contact
relay 2
17
Ba�ery CR2032
21
Status LED
Instala�on, assembly and disassembly of the detector
Before assembling, read the valid instala�on standarts EN 60079-29-2 (Selec�on, instala�on, use and maintenance of
detectors for combus�ble gases and oxygen) and EN 45544-4 (Guildelines for the selec�on, installa�on, use and maintenance
of detectors of toxic substances).
In explosive environments the electrical installa�on must be performed according to DIN EN 60079.14 (Electrical instala�on in
hazardours areas)
Secure that the sensor is reachable by air. The detector must be in a free area with no obstacles in its way (furniture etc.)
Ensure that the input of the sensor cannot be polluted by layers of dust or other contamina�on.

1. Assembly of the detector

The detector consists of four parts - the body of the detector, the removable sensor and Ex „d" cable glands.
Detector assembly procedure is as follows:
a) Disassemble the detector using four screws with an internal hexagon of 5 mm.
b) Disconnect the LCD from the motherboard.
c) Mount the detector on a flat surface using four 6 mm dowels to a height above the floor according to the
specifica�on of the detected substance with the gas inlet facing downwards.
d) Pass the cable through the gland.
e) Connect the cabling to the detector terminal board according to the chapters "connec�on of the detector to
control panels". It is only permi�ed to use an Ex "d" gland with an M20x1.5 thread.
f) Interconnect using M4 grounding screws. A CUPAL washer must be used.
g) Connect the LCD.
h) Assemble the detector using four screws with an internal hexagon of 5 mm.
2
PCB electronics
Power supply terminal
6
block +24VDC
Terminal block
10
RS485 B
14
Expanding contact
relay 3
DIP switch for the
18
RS485 address
3
Ex „d" cable gland
Power supply
7
terminal block GND
Expanding contact
11
relay ERROR
Jumper connector of
15
the terminal block
RS485
Programming
19
connector
6
Op�onal Ex „d" cable gland
4
8
Signal terminal block 4-20 mA
12
Expanding contact relay 1
Jumper connector of the
16
communica�on protocol
(DEGA/MODBUS)
20
LCD display connector