Structure and function
Function
3
24 | 50
Building Technologies
007023_k_en_--
Fire Safety
2017-11-22
3.3.2.2 Circuit
Prerequisites:
The input lines must be provided with resistors.
The resistors must be connected at the end of the line.
Only monitoring resistors with a tolerance of 1 % must be used.
The admissible circuitry depends on the module that is used.
The configuration of the module must correspond to the actual circuitry.
Input module FDCI222 and input/output module FDCIO222
Figure 7: FDCI222 and FDCIO222 circuitry
The FDCI222/FDCIO222 connection diagram applies to monitoring for short-
circuit and open line.
When the line is only to be monitored for open line, the resistor Rs 1.15 k
must not be provided.
Input/output module FDCIO224
With FDCIO224 two different kinds of circuitry are possible.
Figure 8: FDCIO224 circuitry
Connection diagram (1):
– The 560 monitoring resistor applies to monitoring for short-circuit and
open line.
– When the line is only to be monitored for open line, the 560 resistor must
not be provided.
Connection diagram (2) for the VdS extinguishing interface:
– Monitoring only possible for short circuit and open line.
See also
2
Connecting the module [ 39]
+
IN
FDCI222/FDCIO222
Rs 1.15 k
R
p
3.
01
k
+
IN
FDCIO224
2
560
2.
7
k
3.
3
k
68
0
1
