OMX PROFIBUS

OMX PROFIBUS

DIGITAL TRANSMITTER • RS 485 > PROFIBUS

The transmitter is designed for easy and cost-effective connection of ORBIT MERRET™ instruments to PROFIBUS line with installation to DIN rail. One device can control up to 31 instruments via the RS 485 line with communication protocol OM ASCII.

  • RS 485, OM ASCII
  • PROFIBUS DP
  • galvanic separation: 2,5 kVAC
  • width 22 mm
  • instalation to DIN rail
  • power supply 10…30 V AC/DC or 80…250 V AC/DC

 

Input
Profibus interface
Input
EIA RS-485
Protocol
PROFIBUS
Rate
9,6 kBaud…12 MBaud
Address
0…125, adjustable in OM devices with the address „00
Data transfer
54B into OM instruments
44B from OM instruments
Modes
data reading + limits setting
value display FLOAT (Real)/LONG
text display
sending OM ASCII instructions
Number of participants
< 32
< 126 with the use of a repeater
Transfer status
4x signalization LED
RS 485 interface
Input
RS 485
Protocol
OM ASCII
Format
8 bits + no parity + 1 stop bit
Rate
600…115 200 Baud
Number of OM instruments
< 32
Communication rate
0,1…17 s + communication period according to rate
Cable connection
Cable type
Shielded twisted doubleline
Cable resistance
characteristic resistance 135...165 Ohm
Cable capacity
< 30 pF/m
Cable cross section
> 0,32 mm2
Cable length
1 200 m at baud rate 9.6 / 19.2 / 93.75 kBit/s
1 000 m at baud rate 187.5 kBit/s
400 m at baud rate 500 kBit/s
200 m at baud rate 1 500 kBit/s
100 m at baud rate 3 000/6 000/12 000 kBit/s
Settings
Control
The device is designed for simple measurement without further control
Instrument accuracy and functionality
Watch-dog
reset after 400 ms
Calibration
at 25°C and 40 % r.h.
Power supply
Power supply
10…30 V AC/DC, ±10 %, PF > 0,4, I < 40 A/1 ms, isolated
80…250 V AC/DC, ±10 %, PF > 0,4, I < 40 A/1 ms, isolated
Current draw
< 1,5 W/1,5 VA
Mechanical properties
Dimensions
22 x 98 x 113 mm (w x h x d)
Material
PA 66, non-inflammable UL 94 V-I (blue)
Installation
DIN rail, width 35 mm
Operating conditions
Connection
connector terminal board, cable section < 2,5 mm2
Canon 9
Stabilization period
within 5 minutes after switch on
Operating temperature
-20°…60°C
Storage temperature
-20°…80°C
Protection class
IP20
El. safety
EN 61010-1, A2
Dielectric strength
4 kVAC within 1 min. between pow. supply and input
Insulation resistance
power supply 600 V (ZI), 300 V (Di)*
input, output, PN 500 V (ZI), 250 V (Di)*
EMC
EN 61326-1
Images
Dimensions and installation
Connection
To assemble the order, first select the desired instrument configuration.
OMX PROFIBUS-?-??
Power supply
Any
?
Any
?
10...30 V AC/DC
0
80...250 V AC/DC
1
Specification
Any
??
Any
??
Standard
00
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