MSA SUPREMATouch MCP 20, Руководство по эксплуатации

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System Concept
GB
SUPREMATouch
2.6 Bus Protocol
The SUPREMATouch uses the CAN bus protocol. On the Interconnection Board (MIB module),
the DIL switch can be used to set the transfer speed to 10, 20, 50, 125, 250, 500 or 1,000 kBits/s
for all of the connected modules. All modules on one bus must operate at the same bit rate; if one
of the modules uses a different rate, an error state occurs on the bus. This is detected, and appro-
priate messages are displayed.
Each module receives a code (Node ID) in the range of 1–127 by the use of the DIL switch of the
MIB module board on the basis of its slot in the rack. Each of the modules on one bus must have
its own code. If duplicate codes are detected, an error message is generated.
2.7 System Power Supply
The system is supplied with an operating voltage of 24 VDC (19.2–32 VDC). 3 pairs of terminals
for the connection of three 24 VDC power supply sources (EXT, INT, BAT) are provided on the
Interconnection Board (MIB module). Therefore the power can be taken from 3 different sources
(redundancy). If all three supply voltages (EXT, INT and BAT) are present, the system selects
only one of these to supply the module, in the following order of prioritisation:
1st = EXT, 2nd = INT, 3rd = BAT.
The system module hardware manages the power supply changeover.
When an external power pack or battery supply is used, MSA recommends that the power is
filtered through an appropriate EMC (electromagnetic compatibility) filter. See chapter 12.2
"Installation Instructions for Following the EMC Directives"for low voltage installation information.
In order to protect the battery and the SUPREMATouch against damage, an additional deep
discharge contactor component is required in the corresponding 24 V feeder (e.g. deep discharge
contactor C1900-TLS, Mentzer or similar).
• The customer is responsible for providing a safety cut-out (maximum rack power, 480 W/20 A).
• 85–264 VAC is supplied via screw terminals directly on the power supply unit.
• The EXT, INT and BAT voltages are supplied to each system module.
• Voltages required for the individual modules are obtained in the modules themselves from the
24 V.
• The power requirement that must be met is derived from the type and number of sensors
connected and from the components installed in the system.
• Maximum power provided for one rack is 480 W (maximum current of 20 A).
• The transmitter/detector input modules measure all input voltages and can generate error
messages, which can be shown on the display unit. In addition, a POWER FAIL relay
(optional: redundant) is de-energized when the status of the system power supply changes.
EXT Terminals (External Power Supply, 24 VDC)
• Connection for voltage supply from an external power supply unit; power is sent to all units in
the rack.
• Required when a redundant power supply is provided or when the internal rack power supply
is not sufficient to operate all of the sensors.
• Maximum supply current of 20 A for one rack.
SIGNAL:
AL 1–AL 4 (red)
input signal alarms
(each input can have up to four alarms)
FAIL (yellow)
specific input signal statuses
(measurement values that are over full-scale, below the measurement
range and signal failures)