20
Installation
GB
Model 9010/9020 SIL
WARNING!
When opening the control unit housing, there is a risk of high voltage danger from relay contacts
and main power supply. Only authorized persons should open the control unit when it is switched
off and secured against unintentional switch-on. Before opening the housing, it must be confirmed
that power is off for all poles.
Make the electrical connections (power supply, detectors, alarms, etc.) to the backplane terminal
board of the control unit referring to the specific TERMINAL CONNECTIONS DIAGRAMS (Fig. 7
and Fig. 8) with relay or opto-isolated output.
230 VAC Internal Power Supply
The control unit is provided with an internal power supply 100 VAC - 230 VAC / 24 VDC (max.
input current 0.6 A). The main supply input is protected by a non-replaceable fuses (T 1.6 A).
Internal power supply can be used to supply external auxiliary devices (e.g. relays, transmitters).
For this purpose the internal power supply provides 24 VDC supply output available at terminals
4 (+) and 5 (-). The maximum power that can be connected depends on the power requirements
of the connected detectors / transmitters. The output is protected by a fuse.
WARNING!
No capacitive or inductive loads, maximum current for external devices 100 mA.
WARNING!
High temperatures may result in supply power reduction and can have a negative impact on the
internal power supply lifetime.
24 VDC External Power Supply
The external 24 VDC power supply (e.g. battery) can be used as back up option or if main power
is not available. The external 24 VDC supply input is protected by a replaceable fuse (2 A).
When the control units are connected to external power supply make sure that the voltage remains
within the values listed in chapter 9.
If 24 V DC power supply is used only, the user has to make sure that the controller is properly
grounded.
The control unit measures the status of both of internal and external power supplies. Failure indi-
cation is displayed if any supply is out of the acceptable limits.
WARNING!
The control unit is not predisposed for battery backup charging; this function needs to be imple-
mented by external devices.
Check Fig. 7 and Fig. 8 to identify the main and DC power supply line connection terminals.
For better EMC performance external line filters are recommended to be used on both internal
and external power supplies connection lines (e.g. line filters of the EPCOS SIFI-H
B84113H0000B06) series).
MSA recommends protecting the control unit with appropriate external switches (auto-
matic switches, differential switches) as close as possible to the installed unit, the instal-
lation should comply with the standards IEC 60947-1 and IEC 60947-3.
Refer to the following table for CV18 jumper position and optimal Access Code functions
setting.
Use electrical conductors suitable for the power values mentioned in chapter 9.
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