FCU 500, FCU 505 · Edition 02.17
116
Parameters
12 .8 .2 Function of terminal 65
Parameter 70
If large test volumes are to be checked for tightness, it is pos-
sible to reduce the testing time. A second pressure switch is
required for this purpose to monitor the test volume V
p1
. The
first pressure switch (at terminal 45) is set so that it monitors
¼ of the inlet pressure p
u
, the second pressure switch (at ter-
minal 65) monitors ¾ of the inlet pressure p
u
.
The “Reduced DG test duration” function is activated by
setting parameter 70 to 1. Terminal 65 is thus assigned
the function “Input for 3p
u
/4 pressure switch for tight-
ness test”. Terminal 45 is thus assigned the function
“Input for p
u
/4 pressure switch for tightness test”.
PZL
PZH
FCU 500..C1
µC
P
49
13
14
50
47
58
48
TC
PZL
PDZ
M
>750°
ϑ
1
2
3
V
p1
V1
V2
p
u
p
z
p
d
p
u
/4
PZ
PZ
3p
u
/4
65
45
1
2
Parameter 70 = 0: Off
Parameter 70 = 1: reduced DG test duration
Parameter 70 = 2: AND with emergency stop (terminal 46)
Parameter 70 = 3: AND with air
min.
(terminal 47)
Parameter 70 = 4: AND with air flow monitoring (terminal 48)
Parameter 70 = 5: AND with gas
min.
(terminal 49)
Parameter 70 = 6: AND with gas
max.
(terminal 50)
12 .8 .3 Function of terminal 66
Parameter 71
An external safety temperature monitor module
(STM module) can be connected to terminal 66 to sig-
nal High temperature mode. The input is activated for
this function with parameter 70 = 2.
Parameter 71 = 0: Off
Parameter 71 = 2: external HT signal. High temperature
mode is signalled by an external safety temperature
monitor (STM).
L1
1
2
3
46
47
48
49
50
4
67
44
52
45
51
65
66
68
41
42
16
17
18
57
13
14
15
53
54
55
56
58
62 61
5 6 7 8
11 12
FCU 50x
5AT
3,15AT
µC
24V
DC
88
66
STM
Parameter 71 = 3: AND with emergency stop (terminal 46)
Parameter 71 = 4: AND with air
min.
(terminal 47)
Parameter 71 = 5: AND with air flow monitoring (terminal 48)
Parameter 71 = 6: AND with gas
min.
(terminal 49)
Parameter 71 = 7: AND with gas
max.
(terminal 50)
