Siemens XC1001-A Installation And Maintenance Manual page 46

Multi-sector installation
8.2.3 XCA1031 module description
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Building Technologies
Fire Safety
The activation line output (contact resistor) is activated as soon as the XC10 is
switched to the activated condition. This output is used to inform the XCA1031
common module that one XC10 is activated.
The multi-sector bus is a one way RS485 communication from the XCA1031
module to XCA1030 modules. It is used to send status informations and inter-
blocking messages from the XCA1031 module to XCA1030 modules
Fig. 31 XCA1030, multiple flooding zones individual module
Mark Pin Function
X1 — XCM1002 main board flat cable connection
X2 — Not used
X3 — Multi-sector bus configuration jumper (see paragraph 8.3)
X4 1 (+) / 3 (–)
Multi-sector bus (RS485)
2 (+) / 4 (–)
X5 — Not used
X6 1 (+) / 2 (–) Selector valve position monitoring input
X7 1 (+) / 3 (–)
Activation line
2 (+) / 4 (–)
X8
F1 / F2 — Unused fuses
In normal standby condition, the XCA1031 module sends polling messages to all
XCA1030's connected on the multi-sector bus, so that each XC10 knows that the
XCA1031 is working correctly. The polling message contains the following
informations:
- loss of agent
- short circuit or disconnection of actuator line
- short circuit or disconnection of loss of agent line
- short circuit or disconnection of activation line
- multi-sector inter blocking
- earth fault
Due to EN12094-1 requirement (any fault on a transmission path shall not affect
the function of more than one flooding zone), the actuator line is redundant. No
calibration is required (reverse reverse polarity operation). If the actuator line is in
fault condition, the XCA1031 sends a fault message via the multi-sector bus and all
XC10's "Actuator fault" leds are turned on.
Due to redundancy again, the XCA1031 must be powered with two different 24V
power supplies. LEDs H1 and H2 indicates the presence of these 24V power
supplies. Usually, the first and the last XC10s connected on the multi-sector bus
are used to power the XCA1031 module. If one power supply is missing, the
XCA1031 sends a fault message via the multi-sector-bus and all XC10's "Fault"
leds are activated. However, in such condition, the system operation is not
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2015-03-04