Inficon LDM250 Manuale utente

Operating Manual

LDM250/LDM450/LDM650

Low Voltage

Multipoint unit

English ·

INFICON

(WD) 724-250 450 650 -Low Voltage Operating Manual 220627.docx

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LDM 250 450 650 Low

voltage Multipoint unit

LDM 250 450 650 Low

voltage Multipoint unit

LDM 250 450 650 Low voltage Multipoint unit............................................................................................. 3

English................................................................................................................................................................... 9

INFICON

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(WD) 724-250 450 650 -Low Voltage Operating Manual 220627.docx

LDM 250 450 650 Low

voltage Multipoint unit

LDM 250 450 650 Low

voltage Multipoint unit

LDM 250 450 650 Low voltage Multipoint unit

Fig. 1

INFICON

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LDM 250 450 650 Low

voltage Multipoint unit

LDM 250 450 650 Low

voltage Multipoint unit

Wiring diagram

INFICON

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(WD) 724-250 450 650 -Low Voltage Operating Manual 220627.docx

LDM 250 450 650 Low

voltage Multipoint unit

LDM 250 450 650 Low

voltage Multipoint unit

Logical matrix

HFC, HFO, HCFC

H3 = 20 cm

X = 50 cm

Y = 20 cm

Power off

Preheat

Normal

Service mode

Fault U<0,1V

T<Xmin, X = delayin minutes. Letter U =

signal from sensor (Vdc).

T<Xmin.

T>Xmin.

T<Xmin.

T>Xmin.

T<Xmin.

T>Xmin.

T=<4 (h)

T=>4 (h)

LEDs (terminal board)

Power 0 X X X X X X X X X X X

Buzzer (disabled via jumper) no indication

LEDs (per channel)

Power/active 0 Flash X Flash X X X X X X 0 0

Alarm C (low level) (Vdc) 0 0 0 Flash Flash X X X X X Flash 0

Alarm B (middle level) (Vdc) 0 0 0 Flash 0 0 Flash X X X Flash X

Alarm A (high level) (Vdc) 0 0 0 Flash 0 0 0 0 Flash X Flash 0

Summary Relay output (Energised/Not energised)

Alarm C NE E E E E NE NE NE NE NE E E

Alarm B NE E E E E E E NE NE NE E E

Alarm A NE E E E E E E E E NE E E

Fault (RelayD) (no time delay) NE EEEEEEEEENE NE

Fault (RelayD) (4 hour time delay) NE EEEEEEEEEENE

Auto reset Man reset

Test mode sequense 5 s 10 s 15 s 20 s 25 s 30 s 35 s 40 s 45 s 50 s 55 s 60 s

LED Power/active 0 Flash X Flash X X X X X X 0 0

LED Alarm C (low level) 0 0 0 Flash Flash X X X X X Flash 0

LED Alarm B (middle level) 0 0 0 Flash 0 0 Flash X X X Flash X

LED Alarm A (high level) 0 0 0 Flash 0 0 0 0 Flash X Flash 0

Alarm C

U=(>C,<B)

Alarm B

U=(>B,<A)

Alarm A U>A

INFICON

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voltage Multipoint unit

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voltage Multipoint unit

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LDM 250 450 650 Low

voltage Multipoint unit

LDM 250 450 650 Low

voltage Multipoint unit

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voltage Multipoint unit

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voltage Multipoint unit

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(WD) 724-250 450 650 -Low Voltage Operating Manual 220627.docx

English

LDM 250/450/650 Low voltage Operating Manual

1. Table of Contents

2. Features.................................................................................................................................................10

3. Models ...................................................................................................................................................11

4. Function .................................................................................................................................................11

4.1 AUTO/MANUAL ALARM RESET .........................................................................................................11

4.2 ALARM TIME DELAY (T1) ....................................................................................................................11

4.3 RESET/TEST/SERVICE-BUTTON (7) .........................................................................................11

4.3.1 SERVICE MODE ...............................................................................................................................12

4.3.2 FAULT MODE...................................................................................................................................12

4.4 INTERNAL BUZZER AND 24VDC AUXILIARY OUTPUT.................................................................12

4.5 Remote sensors ......................................................................................................................................13

5Location/Installation ...........................................................................................................................13

5.1 ALARM LEVELS / CHANGING ALARM LEVELS .......................................................................13

5.2 Function Control ..............................................................................................................................13

6Technical Data......................................................................................................................................13

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English

2. Features

The LDM250, LDM450 and LDM650 are central units with two/four/six channels(sensors).

The LDM250/450/650 is a multi-channel microprocessor-based gas monitoring system. Each, up

to a maximum of six channels, can be individually configured to monitor different gases with up to

three alarm concentrations all with status LEDs.

Other features include:

- User configurable alarm time delays

- Manual/auto alarm reset for each channel

- Built-in service function and self-test program

- Four alarm relays with 230 volts rated SPDT contacts

- Failsafe relay operation on power loss

- Audible alarm

- Low voltage output for auxiliary alarm indication.

Please Note!

The LDM250, LDM450 and LDM650 are normally supplied with default set alarm

thresholds. These must be verified or reset during commissioning. Alarm levels

must always be set on each channel for proper gas and detector type.

Default settings from factory:

Alarm level

Offset

Alarm C

1,0V

Alarm B

2,0V

Alarm A

3,0V

Alarm levels, factory settings are:

HFC, HFO, HCFC (ppm)

C=100

B=1000

A=2000

Table 3

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