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”.
Z
Z
9
450
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).
1 2 3 46 47 48 49 50 4 67 44 52 45 51 65 66 68
41 4216
17 18 57
13 14 1553
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)
To Next Page
