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8024493/AE00/V1-0/2020-09| SICK
O P E R A T I N G I N S T R U C T I O N S | DUSTHUNTER SP100 Ex-2K
Subject to change without notice
3
PRODUCT DESCRIPTION
3.6
Interfaces
Communication between sender/receiver unit and control unit
As standard, each sender/receiver unit is connected to a control unit via the connection
line.
Data transfer to the MCUDH Ex-3K control unit and the power supply (24 V DC) from the
MCUDH Ex-3K control unit run via a 4-lead shielded line with plug-in connector.
The MCUDH Ex-3K USB interface can only be used in the Ex-free zone, because opening
the control unit while it is live is not permitted in the Ex-area. Alternatively, an RS485
service interface is connected to terminals 43 and 44 (
). A line up to 1000 m long can be routed from the above-mentioned connection
terminals through an unused cable duct into the safe area. Please note that the service and
USB interfaces cannot be operated simultaneously.
3.6.1
Standard interfaces of the MCUDH Ex-3K control unit
Table 6: Standard interfaces of the MCUDH Ex-3K control unit
Optional interfaces for the MCUDH Ex-3K control unit
Additional options can be integrated to extend the functional scope of the MCUDH Ex-3K
control unit (
see “Options for MCUDH Ex-3K control unit”, page 127
●
Fieldbus module
The RS485 interface module for the transmission of Modbus ASCII/RTU or CoLa-B
(protocol SOPAS-ET) serves to forward measured values, system status and service
information to higher-level control systems. A ribbon cable serves to connect the module to
the processor board. An RS485 signal line up to 1000 m long can be connected to the
module, which can then be led out of the Ex-zone. The RS485 signal line can then be
converted to Ethernet in the safe area using the following fieldbus modules: Ethernet
Service Type 2 or Modbus® TCP (remote modules with separate 24 V supply).
●
Remote Display 100
The Remote Display 100 offers identical functions as the MCUDH Ex-3K control unit, but
can be mounted further away.
– Operating functions as on MCUDH Ex-3K display
– Distance to the device: Observe the minimum cable cross section (max. current:
0.15 A, min. voltage: 20 V on the display).
The MCUDH Ex-3K and the Remote Display 100 are locked against each other, both devices
cannot be operated at the same time.
Analog output
1 output 0/2/4...22 mA (electrically isolated; active; resolution 10 bits) to output:
Scattered light intensity (corresponds to the uncalibrated dust concentration),
calibrated dust concentration, scaled dust concentration.
Analog inputs
2 inputs 0…20 mA (standard; without electric isolation; resolution 10 bits).
Relay outputs
5 changeover contacts (48 V, 1 A) to output status signals:
Operation/malfunction; maintenance; function check; maintenance request; limit value.
Digital inputs
4 inputs to connect potential-free contacts
(e.g. to connect a maintenance switch, trigger a function check or further actions).
Communication
USB 1.1 (use only outside the Ex-area).
RS485 service interface (on connection terminals) for measured value enquiry, parameter setting and software
update.
Internal RS485 interface for communication between sender/receiver unit and control unit.
