Bosch 120 Series, MC-120-DKM Manual

Product description

The series 120 non−automatic fire detector is used for manual alarm triggering in conventional line technology (GLT). The line is monitored according to the principle of voltage reduction and increase.

The Form H detectors are designed for exterior areas, the Form G detectors for interior areas.

Overview of non−automatic fire detectors, series 120

Manual call points

• FMC−120−DKM−G−R Manual call point for interior areas (Form G), red
• FMC−120−DKM−H−R Manual call point for exterior areas (Form H), red

Manual call points

• FMC−120−DKM−G−B Manual call point for interior areas (Form G), blue
• FMC−120−DKM−H−B Manual call point for exterior areas (Form H), blue
• FMC−120−DKM−G−Y Manual call point for interior areas (Form G), yellow

Stop device

• FMC−120−EST−G−B Stop device for interior areas (Form G), blue

Features

• Manual call point and stop device: Trigger alarm by pushing the button. After alarm triggering, the push button is adjusted.
• Detector query routines with evaluation and multiple transmission.
• Display (LED) for triggered alarms or inspection evaluation.
• Second contact with connections for panel control.
• Same design for interior use (Form G) and exterior use (Form H).
• Available in different colour variants; see order overview.
• For the red colour variants, a burning house" is applied to the detector housing in the factory.
• Variable labelling is possible with foil sets for the blue and yellow colour variants.
• For exterior use in extreme environmental conditions, the detector is equipped with an especially resistant PC board (parylene layering) and with a seal in the detector door.

Planning notes

• Non−automatic fire detectors must be mounted visibly along escape and rescue routes (e.g. exits, passageways, stairwells) and be easily accessible.
• An installation height of 1400 mm (200 mm), measured from the middle of the push button to the floor, must be maintained.
• Non−automatic fire detectors must be sufficiently lit with sunlight or another light source (including emergency lighting if present).
• The distance between non−automatic fire detectors should not exceed 100 m according to DIN 14 675 or 80 m according to VdS.
• In high risk areas, non−automatic fire detectors should be installed at intervals of max. 40 m (VDE 0833 Part 2, Point 7.2.6).

Maximum number of detectors that may be connected

In accordance with VdS guidelines, a maximum of 10 non−automatic fire detectors may be connected to a primary line.

The test detector can be used for primary lines with automatic fire detectors. It is connected to the electrical end of the primary line (max. 1 test detector per primary line).

Norms, guidelines and planning recommendations

Additional norms, guidelines, and planning recommendations with respect to installation location etc. must be taken into account (see fire detector manual).

The regulations of the local fire services must be observed.

Use in explosive areas

All non−automatic detectors from fire detector series 120 conform to device category 3G, gas group IIB and temperature class T6, in accordance with the European guideline 94/9/EG (ATEX). Thus the detectors may be used in Zone 2 areas where there is danger of explosion!

Limiting values:

• Detectors may only be operated with central units whose line output is energy−limited according to EN 50021. This applies to all Bosch fire panels (BMZ).
• The line voltage (U_max) must not exceed 33 V!
• The maximum current (I_max) must be limited to 130 mA!

Fire detector cable:

• Only fire detector cables that conform to DIN VDE 0814 may be used.
• The total cable capacity (C_max) must not exceed 1 F!
• The total cable inductivity (L_max) must not exceed 0.01 H! The cable type J−Y(ST)Y08, in accordance with DIN VDE 0815 (table 10), has a capacity of 120 F at a length of 1000 m.

Labelling variants

The detectors can be individually adapted to the location/application with optional labelling variants. This excludes detector variants FMC−120−DKM−G−R and

FMC−120−DKM−H−R, to which the burning house" symbol has already been applied.

The self−adhesive labelling foils are stuck on the front panel of the detector.

Order contents

Basic model

Labelling foils

Accessories / Spare parts

Device structure

The non−automatic fire detector is available in several variants and essentially consists of the following elements.

Functional description

Manual call point

Manual call point and stop device: In the event of an alarm, the glass pane (2) is broken first, then the manual call point (3) is pressed hard.

This activates the microswitch for alarm triggering and the display LED (4) flashes.

A locking mechanism holds the pressed push button down.

The pressed push button is reset by manually activating the reset lever (5) or by opening the detector door (1) ⇒ The alarm is reset and the display LED goes out (4).

Functional test

Manual call point and stop device: To trigger the alarm, press the manual call point (3) hard. The display LED (4) flashes. Use the reset lever (5) to return the manual call point to the starting status.

Test detector

A maximum of 1 test detector (1) may be connected to the electrical end of the primary line. Up to 30 automatic fire detectors may be connected to the primary line to be tested. The test detector is supplied by the fire panel.

Installation

• The non−automatic fire detector is designed for wall mounting.
• The installation height, according to VdS regulations, is 1400 mm (± 200 mm) from the floor to the centre of the push button.
• The connection cables can be surface or flush−mounted.
• The cable ducting should be carried out using the intended openings in the housing (see Cable duct).
• The installation location is to be selected so that approximately 35 mm space remains free on the right−hand side for opening the door.

Installation dimensions (view: housing rear wall interior)

Cable duct

Surface−mounted cable duct

Flush−mounted cable duct

Installation variants for fire hose cabinets

Connection

Detailed wiring diagrams and bridge assignments for connection to different fire panels are shown in the wiring diagram manual.

In order to reach an alarm resistance of 820 Ohm in current gain operation, resistor R6 must be removed. For other operating modes (voltage reduction), see the wiring diagram manual for the corresponding fire panel.

Do not remove the end of line resistor from the last detector! It must be removed from all other detectors.

Notes on maintenance and service

For maintenance and inspection work on security systems, the regulations of DIN VDE 0833 apply in Germany; these regulations refer to the maintenance intervals as per the manufacturer's instructions.

• Bosch ST recommends a functional and visual inspection at least once a year.
• Maintenance and inspection work should be carried out regularly and by trained personnel.

Repair

In the event of a defect, the entire unit is exchanged.

Additional documentation

For those with the appropriate access authorisation, see Bosch ST ExtraNet at www.boschbest.de for the updated product information and the installation manual as a downloadable PDF file.

Technical specifications

Table of abbreviations