INIM Electronics PREVIDIA IFM2L Manual Del Usuario página 6

3 Mounting IFM internal modules
Refer to Figure 2 - PRCAB + IFM, page 1.
The internal modules (IFM24160, IFM2L, IFM4R, IFM4IO, IFMDIAL, IFM16IO, IFMNET, IFMLAN, IFMEXT) must be
mounted in the special compartment inside the cabinet. There are two bars on either side of the compartment
for mounting and connecting modules, up to 8 per cabinet.
1. Inside the compartment, find the position of the module that corresponds to one of the connectors on
the PCB bar.
If you are installing an IFM24160 power-supply module, you must use the first connector at the top. When
installing any other type of internal module, you can use this or any other connector that is free.
2. Position the module in such a way that it is on level with the desired connector on the bar hen insert it in
place by pushing it carefully to the left.
3. Affix the module to one of the holes on the grounding bar using one of the supplied screws.
4. Complete the wiring on the internal module.
4 Loop connection
The connection circuits of the peripheral detection/activation devices are defined as "loops". These loops start
from the output terminals, run through the entire protected area connecting in parallel all the system devices
before re-entering on the input terminals.
The loop utilizes the same two wires for the power supply to devices and for two-way communication. Due to
electrical incompatibility, different brand devices (i.e. devices using different protocols) cannot co-exist on the
same loop. However, the loops can be programmed separately in such a way as to allow the system to manage
different brand devices on different loops.
Loops are made by means of a two-wire shielded cable with proper wire section (refer to the following cable
specifications) and in compliance with local laws in force.
The wiring must be completed in a loop in order to guarantee the tolerance of wire-cutting or short-circuit on the cable.
Cables:
2 wire shielded cable
Twisted 5/10cm
Total maximum capacity 0.5uF
Maximum length 2000m
Maximum resistance (considering the sum of the positive and negative
conductor) 40Ohm
It is necessary to consult the configuration software, Previdia/STUDIO, for
the proper cable sizing in relation to the power consumption of the
connected devices, or to the following table for a rough estimate:
The cable shield must be connected to the grounding bar at one end only.
For the connections of the various devices refer to the instructions supplied with the devices themselves.
The Figure 3 - Loop, page 20 illustrates the proper completion of the loop wiring. Starting from Loop-A/B OUT
terminals on the IFM2L module ([A], paragraph 2 - [C] - [D]) proceed with the connection of the peripheral
devices located in the area protected by the system ([B]) and re-enter on Loop-A/B IN terminals ([C]).
When connecting the loop devices it is not necessary to follow the input/output order indicated in the figure.
Connect the cable shield only at the start of the loop ([D], the shield can be connected to the terminal
indicated in the figure or directly to the grounding bar). Take care to link the interrupted shields in
correspondence with the device connections ([E]).
EN54:
A Previdia Max control panel can support up to 3840 fire detectors and/or manual call
points (240 devices per loop).
6
Total loop length
Up to 1000m
Up to 1500m
Up to 2000m
Wire section American Wire Gauge
2 x 1 mm²
2 x 1.5 mm²
2 x 2 mm²
17 AWG
16 AWG
14 AWG
Mounting IFM internal modules
IFM2L