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8020216/19YN/V3-0/2020-12| 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-3K
Subject to change without notice
PRODUCT DESCRIPTION
3
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 may 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 (
see “Connection plan”, page 55
line up to 1000 m long can be routed from the above-mentioned connection terminals 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 136
).
●
Interface module
The 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 Interface modules: Ethernet Service Type or Modbus®
TCP (remote modules with separate 24 V supply).
●
Remote-Display 100
The Remote-Display 100 in connection with the MCUDH Ex-3K control unit offers
identical functions for operation in the safe area.
– Operating functions as on MCUDH Ex-3K display.
– Installation in the safe area.
– Clearance 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 inquiry, configuration and software
update.
Internal RS485 interface for communication between sender/receiver unit and control unit.
