4. INSTALLING MDP
IN THE SYSTEM
Installation of the MDP can proceed after time necessary for compensation of temperatures of the MDP unit and
the surrounding air. Especially in the winter, with temperature below zero centigrade, during transportation or
storage wait 20 minutes before taking out of the foil package to prevent condensation of water vapour on
internal circuits of the device. NOTE: the LCD can work improperly at temperatures <0
°
C!
4.1
Mount the unit in a designated place, inaccessible to outsiders, outside the EX zone, free from
strong electromagnetic interferences, vibration or shocks.
4.1.1
Unscrew the lid of the terminal chamber- it reveals access to two assembly holes.
4.1.2
Hang the unit on a previously prepared hook (in the middle of an indicated assembly location); mark
locations of two other assembly holes (assembly position acc. to fig. 1.2)
4.1.3
Insert pins; screw the unit in. Assembly of the unit needs to be solid, secure and without any
clearance.
4.2 Note!!! Carry out installation only when the power is off and the main switch of the MDP
unit is switched off!!
4.3
Lead connecting cable(s) “A16” through gland seal ducts from the cable hub (1÷3 cables with a
summary number of conductors > 27 for K-8P or >54 for K-16P, necessary with round section
and external diameter of <13 mm). Length of the “A16” cable depends on the length of “A” cable
connecting DEX detectors with the hub.
TABLE 4.3.
Selection of conduits for detectors depending on the model of detector (with a
semiconductor sensor:
-
nn
, infra-red:
–(P)nR
, catalytic:
–Pn
)
Conduit
(fig. 2.2)
Conductor’s
section mm
2
Permissible length of conductors
0.2
1m
< 10m
< 20m
-
-
A16
0.5
1m
-
-
< 50m
< 100m
0.5
< 150m
< 150m
< 100m
< 100m
< 30m
1.0
< 300m
< 300m
< 200m
< 200m
< 60m
A (-
nn
, -
(P)n
R)
(for the length A16
as above)
1.5
< 450m
< 450m
< 300m
< 300m
< 90m
0.5
< 100m
< 75m
< 50m
< 50m
< 15m
1.0
< 200m
< 150m
< 100m
< 100m
< 30m
A ( -
Pn
)
(for the length A16
as above)
1.5
< 300m
< 225m
< 150m
< 150m
< 40m
For detectors with electrotechnical sensors, with model designation:
-(P)
n
E/N
- all lengths of “A”
cable in Table 4.3 (depending on “A16”) can be assumed as “
<450m
”.
4.3.1
Preserve the proper sequence of connecting conduits with detectors - improper order will
result in system malfunctioning.
TABLE 4.3.1. Description of connections between MDP and K-8(16)P cable hub
(numbers of
terminals)
.
Detector no.
DET1 DET2 DET3 DET4 DET5 DET6 DET7 DET8
Input mark
+ S M + S M + S M + S M + S M + S M + S M + S M
MDP terminal
no.
30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53
K-8(16)P
terminal no.
81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
100
101
102
103
104
Detector no.
DET9 DET10 DET11 DET12 DET13 DET14 DET15 DET16
Input mark
+ S M + S M + S M + S M + S M + S M + S M + S M
MDP terminal
no.
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87
K-8(16)P
terminal no.
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
MDP-4(8,16)… Instruction Manual
edition 6PU63en
©gazex’2011 v1101
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