ID-E270-011GB
81
The MSI-48 module is equipped with an 8-position switch containing keys K1...K8.
Keys K1...K5 are used to assign (by means of hardware) a number to a control panel using the binary
code. Each of these five keys has significance (Wn) defined by its number.
The control panel number may be expressed by means of the following formula:
CONTROL PANEL NO. = W1*1 + W2*2 + W3*4 + W4*8 + W5*16
where:
Wn=0, if Kn key is in OFF position
Wn=1, if Kn key is in ON position
E.g. control panel numbered as 9 has the following keys settings:
K1 - ON
K2 - OFF
K3 - OFF
K4 - ON
K5 – OFF
CONTROL PANEL NO. = 1*1 + 0*2 + 0*4 + 1*8 + 0*16 = 9
Keys K6, K7, K8 currently are not used.
The MSI-48 module is equipped with ZW1 ÷ ZW4 or ZW1 ÷ ZW6 (Ed.3) programming jumpers which
should be set in the position shown in Fig. 10.2.
Additionally, the module is equipped with 8 service diodes (D1 ÷ D8) which may be tuned off by
setting the ZW5 or ZW8 (Ed.3) in position 2-3, which results in decreasing the total current
consumption of the module.
There are two methods of interconnecting the control panels:
-
in a form of a double ring created by means of two independent pairs of wires in a screen;
-
in a form of a double ring created by a pair of optical fibre cables.
In case the control panels are connected by means of wires, the first ring is created by connecting a
pair of wires to applicable output terminals A and B (OUT-1) in one control panel with applicable
input terminals A and B (IN-1) in the other control panel (terminal is connected with terminal A and
terminal B is connected with terminal B). By analogy, applicable terminals A and B (OUT-2) of one
control panel must be connected with terminals A and B (IN-2) of the other control panel in order to
create the second ring. An example of connecting four control panels by means of a double ring of
wires is shown in Fig. 9.3. The maximum cable length between two control panels must not exceed
1,200 m. It is recommended to use the YnTKSYekw. 1 x 2 x 0.8 mm installation cable.
The screen of each cable section should be grounded only from one side and the other end should be
connected (via 10 nF/1500 V capacitor) to the grounding system of a remote control panel (in order
to ensure better resistance to interference – see Fig. 9.3). Both rings should be created
independently, i.e. wire pairs should not be routed in the same cable in order to provide their
resistance to interference and possible cable damage.
In case control panels are connected by means of optical fibre cables, each unit should be equipped
with two optical fibre converters. It is recommended to use converters manufactured by LANEX:
-
TR-55 for any type of fibre-optic cables terminated with the SC/PC type contacts. The
distance between two neighborouing control panels in a ring depends on a fibre-optic cable
type used. (For a single-mode optic fibre of attenuation at 0,4 dB/km, the maximum distance
is equal ca. 40 km taking into consideration the converter parameters.)
-
TR-43.7.1 for 62.5/125 μm or 50/125 μm multi-mode fibre-optic cables (850 nm wave)
terminated with the ST® type contacts. This type connection enables reaching the distance
between two neighbouring control panels in a ring equal to approx. 3 km (depending on the
cables attenuation).
