ZK EX Communication unit

Description

The ZK EX Communication Unit is designed for processing and data exchange between devices with different types of digital transmission. The unit was made in accordance with the requirements for group I, category M1 equipment.

It is designed for operation in spaces at risk of methane explosion and coal dust explosion.

The communication unit equipped with the MK2 communication module can use a network infrastructure based on fiber optics or UTP copper network cable. RS485 transmission circuits, fiber optic signals and network transmission circuits which have protection level "ia" are accessible outside the communication unit. The ZK EX Communication Unit allows conversion of communication standards in both hardware and software aspects by changing data exchange protocols between various devices and the master controller. The master controller is usually a PC, located in an explosion safe area. The default protocols are MODBUS RTU for RS485 links and MODBUS TCP for Ethernet links.

Specification

Type of Explosion-Proof Design

     

Associated apparatus intended for operation in explosive atmospheres

Special Marking of Explosion Protection

  

I M1 Ex ia op is I Ma

ATEX Certificate Number

  

OBAC 08 ATEX 017X

Supply Voltage (Un)

  

11 – 17 VDC

Maximum Current Consumption (Imax)

  

690 mA

Communication Interfaces for Interfacing Devices

  
  • Interface Type A
  

RS485
  • Interface Type B
  

RS485
  • Wired Ethernet Interface
  

Twisted-pair cable UT5, 100 Mbit/s
  • Fiber Optic Ethernet Interface
  

Single-mode fiber, 100 Mbit/s, SC or FC connector

RS485 Interface Parameters

  
  • Transmission speed
  

115200 kb/s
  • Intrinsic safety level
  

“ia”
  • Number of devices on shared line
  

4
  • Maximum transmission range
  

1000 m

Ethernet Interface Parameters (Twisted Pair)

  
  • Number of ports
  

1
  • Connector type
  

RJ45
  • Transmission speed
  

100 Mbit/s
  • Maximum range
  

100 m
  • Safety level
  

“op is”

Ethernet Interface Parameters (Fiber Optic)

  
  • Number of ports
  

1
  • Connector type
  

SC, FC
  • Fiber type
  

Single-mode
  • Transmission speed
  

100 Mbit/s
  • Maximum range
  

20 km
  • Safety level
  

“op is”

Power Input

  

Uᵢ = 17 V, Lᵢ ≈ 0 µH, Cᵢ ≈ 0 µF

Power Outputs (+12 VDC, GND)

  

Intrinsically safe circuits at the safety level guaranteed by the power supply:

Uo = Output voltage of the power supply

Io = Output current of the power supply

Lo = Inductance of power supply – cable inductance (Lc)

Co = Capacitance of power supply – cable capacitance (Cc)

Approval According to Certificate

  

The ZK EX Communication Unit is intended for use in underground workings of mining facilities in areas endangered by methane and coal dust explosions.
  • Maximum Cross-Section of Connected Cable
  

1.5 mm²
  • Number/Type of Cable Glands
  

6 pcs / WKM-M24 Φzk (9–15)
  • Dimensions Without Cable Glands and Power Supply (W × H × D)
  

380 × 250 × 160 mm
  • Overall Dimensions (W × H × D)
  

380 × 358 × 160 mm
  • Net Weight
  

Approx. 13.5 kg
  • Enclosure Protection Rating
  

IP65

Environmental Conditions for Fiber Optic Ethernet Interface

  
  • Ambient temperature
  

+5 to +40°C
  • Relative humidity (non-condensing)
  

< 95% at 40°C
  • Atmospheric pressure
  

700–1060 hPa
  • Operating position
  

Any

Gallery

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