SENSITRON
A Halma Company
MT4811
SMART 3 NC
Quick Guide (EN)
P. 8/10
Installation
CORRECT POSITIONING MODE
The gas detector is always to be mounted with the sensing element placed
downward. For no reasons at all the enclosure can be drilled. During installation
step, the user has to fix the detector with two plugs of 6x40 mm. The plugs must
be positioned following the distancies described in the following figure.
DETECTOR CIRCUIT LAYOUT:
100 mm
100 mm
108 mm
PROGRAMMAZIONE JUMPERS PER SOGLIE DI ALLARME /
JUMPERS PROGRAMMING FOR ALARM THRESHOLDS
CUSTOM
3 5 10
5 10 15
5 10 20
10 15 25
10 15 30
10 20 30
10 25 35
15 25 40
15 30 45
25 35 50
20 40 60
22 23 24
NOT
USED
20 19 18
19 18 17
(*)
(*)
(*)
IL DIP SWITCH N.2 SELEZIONA
LA MODALITA’ DELL’USCITA IN
CORRENTE
DIP SWITCH N.2 SELECTS THE
CURRENT OUTPUT MODE
POSIZIONE “ON”: USCITA ANALOGICA PROPORZIONALE 4-20 mA CORRISPONDENTE ALLO 0-100%
DEL FONDO SCALA
“ON” POSITION: PROPORTIONAL ANALOG 4-20 mA OUTPUT CORRESPONDING TO 0-100% FULL SCALE
POSIZIONE “OFF”: USCITA DOPPIA SOGLIA 10-20 mA PER CENTRALI A VARIAZIONE DI ASSORBIMENTO
(LE SOGLIE OPERATIVE SONO LA 1 E LA 2).
“OFF” POSITION: 10-20 mA CURRENT OUTPUT TO OPERATE WITH FIRE CONTROL PANELS USING A
CURRENT/VOLTAGE CONVERSION (THE OPERATIVE THRESHOLDS ARE THE 1ST AND THE 2ND)
.
I VALORI SONO IN % DEL FONDO SCALA (RIL. OSSIGENO VALORI ASSOLUTI) /
VALUES IN % FULL SCALE (ABSOLUTE VALUES FOR OXYGEN)
USARE SOLO I DIP-SWITCH 3-4-5-6 PER IMPOSTARE LE SOGLIE DI ALLARME /
ONLY USE DIP SWITCHES 3-4-5-6 TO SET ALARM THRESHOLDS
(*) SOLO PER RILEVATORI DI ARRICCHIMENTO - DEFICIENZA DI OSSIGENO /
ONLY FOR DETECTORS OF OXYGEN ENRICHMENT - DEPLETION
1 2 3
4 5 6 7
8
ON
1 2 3
4 5 6 7
8
ON
1 2 3
4 5 6 7
8
ON
1 2 3
4 5 6 7
8
ON
1 2 3
4 5 6 7
8
ON
1 2 3
4 5 6 7
8
ON
1 2 3
4 5 6 7
8
ON
1 2 3
4 5 6 7
8
ON
ON
(*)
1 2 3
4 5 6 7
8
1 2 3
4 5 6 7
8
ON
1 2 3
4 5 6 7
8
ON
1 2 3
4 5 6 7
8
ON
1 2 3
4 5 6 7
8
ON
1 2 3
4 5 6 7
8
ON
1 2 3
4 5 6 7
8
ON
1 2 3
4 5 6 7
8
ON
1 2 3
4 5 6 7
8
ON
ON
Terminal for connections
1 2 3 4 5 6
1 3 5 7
2 4 6 8
JP4
: Connector
Rs485 board or 1 relay board
Dip-switch to set
thresholds’ alarm and detector adress
JP5
: Connector sensing element
1 +Vcc 12-24V
2 RS485 A
3 RS485 B
4 Gnd
5 +Vcc 12-24V
6 +/- 4-20 mA OUT
JP7
Connector
calibration keypad or display or 3 relay board
status LED
JP9:
Pin 1-2 Not to be used
Pin 3-4 Open: Modbus Standard communication protocol
Pin 3-4 Closed: Proprietary protocol tipically used by Multiscan IDI
version 3.00 or before
Pin 5-6 Open: Enables auxiliary boards and display LEDs
Pin 5-6 Closed: Disables auxiliary boards and display LEDs
Pin 7-8 Open: New SMART NC functionalities
Pin 7-8 Closed: Old SMART NC functionalities
1 2 3 4 5 6 7 8
JP6
: Connector
Internal preamlifier
