VDI Legrand,

, -, ...

FITTICH SA Alarm and Security Systems
MIC833-1/ MIC833-2

1. In general
The Display-and remote control panel (MIC) acts as a remote control panel for linked fittich-fire-control-
and extinguish systems. The linkage takes place by an Intel BitBus, a standardised industrial field bus which
works with the Master-Slave Principle. The choice which network participant should be the master and which
the slave is set by the BitBus-node-address (set up by DIP-switch, see technical records)

Master = Address 1
Slave = Address 2 - 62
Bitbus-PC-Card = Address 63, 64

It is to make sure that each address is only once occupied.

Specification of the INTEL-BITBUS-Network
SDLC Protocol (Synchronous Data Link Control)
NRZI Coding (Non Return to Zero Inverted)
Gateway level RS 485
Transfer rate 62.5 KBaud or 375 KBaud
Attention: all participants must be set to the same transfer rate; Set up by Jumper
(s. technical documents)
Between two line segments must be a repeater installed. A line segments is restricted to the amount of
connected participants and to its length. Repeater are as well network participants and have to be taken
in account.

Cable specifications:
- Isolated Cable with 1 wire (with out repeater) or
2 wires (with repeater),
wires twisted, at least 30 raps per meter,
wires with different hitches.
Wires with multiple colour identification
- Wire cross section higher than 0,22 mm.
- Cable resistance below 100 Ohm/km.
- Wire convolution 120 Ohm.
- Capacity smaller than 70 nF/km between the wires.
140 nF/km stray capacity
- Crosstalk attenuation at 150 kHz > 40 dB between wires

Cable type i.e. LIYCY (TP)

Cable laying:
The power supply of the eventual installed repeater should be bounded during laying the cable in the data
cable. To assure a safe operation we recommend to implement the power supply with double wire. In this case
the amount of cables increase from 4 to 8 cables. At small networks (those who do not have repeater) only 2
data lines are necessary and if so the power supply.
If the alarm transmission should be managed via the master-MIC, than a redundant transmission path is
recommended. (see. Chapter 9.2).

Cable connection
PIN Participant 1 Participant 2 Participant N
3 = DATA* ? DATA* ? DATA*
4 = RTS* ? RTS* ? RTS* (if use of repeater)
9 = RTS ? RTS ? RTS (if use of repeater)

Terminating resistor:
In the bitbus-network each cable segment needs to have 2 termination resistor at the beginning and at the end.
(pluggable by jumper; see technical documents)

Power Supply of the MIC833-X

The power supply for the MIC is 230 VAC. Rechargeable batteries (max. 24 Ah) can be placed inside the
housing for emergency supply. The charging takes place via the main adapter of the MIC.

Attention: To activate the control function of the main adapter the parameter 3 is to be set to 1.
(see Chapter Parameter)

The MIC in the 19 assembly version needs a separate 24 VDC power supply.
This can be occur via a FCP from the network for example. To assure a safe function we recommend to carry
out the power supply via a double wired cable. The power consumption of the MIC is to be regarded with the
rechargeable battery.

2. Function description

The MIC shows all appearing messages of the system and allows to handle al connected Fire-control-
systems. At a corresponding programming it is possible that access authorisation blocks a FCP or reduces its
user level. It is possible to connect multiple MIC`s in one system. One of them acts as a Master and the rest
as Slaves. The functions of the slaves are just as practicable.

3. Operation / Service mode

The MIC works in two modes, the operation and the service mode. The respective operating mode is
indicated in the LC display in a text format, unless there are special messages.
The operation mode is the normal mode, where the MIC polls the FCP`s about messages and events or to
control the different FCP`s. For this mode to work, the door of the MIC must be closed.
The service mode is activated as soon as the door of the FCP is opened. While opening the door, the
transmission line (if the transmission line is connected to the MIC) is automatically switched off. Opening the
door of the FCP will also switch off the internal buzzer so as not to irritate staff who may be staying near the

4 LCD-Display
Unless there are messages or the unit is serviced, the top zone of the four zones in the LC display indicates the
current time of day and the current date (neutral position). The third zones indicates the operational mode
(operation or service).
The illumination is activated automatically, i.e. when a key requiring an entry or one of the cursor keys
upwards/downwards are pressed the illumination is switched on. If no further key is pressed, the illumination will
stay switched on for about 60 seconds before it will be switched off. If further keys are pressed, the illumination
switches itself off again 60 seconds after the last key was pressed.

Set-up of the LCD, in case of messages
The LC display automatically shows up every incoming message, regardless of whether the message indicates
an alarm, a failure or a disconnection. If disconnection, failure and alarm messages are received at the same
time, the alarm messages are given priority over the failure message, which in turn are given priority over the
disconnection message, i.e. the message with higher priority rating is given precedence over the message with
lower priority rating. The messages are displayed in the following format (example):
Type of failure, Initial message
Type of message Zone Detector if applicable identification, if applicable
Flt: Z0002 D005 P! *

The symbols identifying the type of message are:
Al for alarm
Flt for failure
FTA for failure technical alarm (detector Zone)
Off for switch-off
TA for test alarm
PA for pre-alarm
Info for informative message ?
Zone = conventional zone
Z = Zone (addressable detectors)
D = detector number within the Zone (for addressable detectors)

The following types of failure are indicated:
SC = short circuit
OC = broken wire
P! = pollution

If there is no message displayed under Type of failure, the detector is an addressable detector which is
removed or defect. The example above thus shows a failure by pollution in Zone 2 at detector 5. How detectors
are assigned to zones will be explained in detail below. The first message received (initial message) will get an
* as an identification marker at the end of the zone. If several messages of the same type (e.g. 5 alarms) are
received at the same time, the first message is displayed in the LCD, all following messages can be inserted via
the cursor key arrow upwards and arrow to the right respectively.
Test alarms are alarms which can be set in the revision mode or the detector test function.
Pre-alarms only occur in combination with addressable detectors. If the parameter for pre-alarms is activated,
the FCP will clearly announce a local alarm below the alarm threshold proper; this alarm is not transmitted and
will not set off sirens but be restricted to the display of the panel.

Indication of system failure
System failures are disturbances, which do not come from detectors or other external devices, but refer to an
internal disturbance of the MIC. The MIC is equipped with comprehensive monitoring functions which
guarantee that each deviation from the desired state, no matter how tiny, is indicated as a message. These
messages may have different degrees of priority. They are either indicated in the LC display in a text format or
only as LED display. Possible system failures and the corresponding measures to be taken are listed below
(ranked according to priority):

Priority Message Meaning Measure
1 LED System in continuous light,
buzzer continuous sound
Failure of CPU, FCP presumably
without function

Notify fault clearing service
2 Failure message in LCD: Failure
detector module xx
Loop or conventional card at
address indicated disrupted for at
least 20 seconds, possibly even
total failure!!
Check whether detector
information can be called up
via the diagnosis function and
notify fault clearing service;

3 Failure message in LCD: Failure
total check RAM and LED
System on
Memory error at RAM memory Notify fault clearing service.

Actual counters in the 4th
display line

As soon as messages have been received, the LC display activates three counters in the bottom, fourth zone of
the display. These three-digit counters are directly assigned to the oval buttons in a perpendicular zone below
the display and indicate the current number of messages that have been received up to that point. If more
messages appear or disappear the counter will be updated automatically.
The buttons under the display are arranged in the sequence

Alarm Failure Disconnection

By pressing one of these buttons, the operator can call the respective messages onto the display. If, e.g. the
display currently shows an alarm message and the failure counter indicates 001, the failure can be called onto
the display by pressing the oval failure button. If several failure messages are indicated, the cursor keys arrow
upwards/arrow downwards can be used to browse through the messages. The cursor key arrow upwards
always browses in the direction of the most recent messages, the cursor key arrow downwards in the direction
of the older messages. Once the alarm indication function has been left, the display will automatically jump back
to the First alarm message after 30 seconds. When the cursor key has reached the oldest message, the next
keystroke will again show the most recent message (scrolling in a circle).

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