ABB Navigator 540, Инструкция по эксплуатации

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Navigator 540 | Transmitter | COM/AWT540/PB–EN Rev. C 9
4.4.2 Cable length
The maximum cable length of a segment is determined by the
transmission speed (see Table 4.3). The cable length specified
can be extended using repeaters, but it is recommended that
no more than 3 repeaters are connected in series.
4.4.3 Cable specification
The cable lengths in Table 4.3 refer to the following cable type:
Suitable PROFIBUS cable (part numbers PCA010, PCA011 and
PCA012) can be obtained from ABB. Refer to Data Sheet
10/63-6.46 EN.
4.5 Network connection
4.5.1 Terminal block network connections
PROFIBUS network connections are made to the terminal
blocks on the Navigator AWT540 PCB located behind the PCB
terminal cover – refer to the transmitter connections section in
the Operating instructions:
— Sodium: OI/ASO550-EN
— Dissolved oxygen: OI/ADS550-EN
— Hydrazine: OI/AHM550-EN
Transmission rate Maximum
segment length
(m [ft.]) Maximum total
network length
(m [ft.])
9.6 to 93.75 kbps 1200 (3937) 4800 (15748)
187.5 kbps 1000 (3280) 4000 (13123)
500 kbps 400 (1312) 1600 (5249)
1.5 Mbps 200 (656) 800 (2624)
3 to 12 Mbps 100 (328) 400 (1312)
Table 4.3: Cable length
Characteristic
impedance 135 to 165

Capacitance per unit
length <30 pf/m
Loop resistance 110

/km
Core diameter 0.64 mm
Core cross section >0.34 mm 2
Table 4.4: Cable Specification
WARNING – Bodily injury
When connecting a Navigator AWT540 to a
PROFIBUS-DP RS485 network:
— Refer to the Navigator AWT540 Operating
instructions before making electrical connections
and for all other installation and connection details:
— Sodium: OI/ASO550-EN
— Dissolved oxygen: OI/ADS550-EN
— Hydrazine: OI/AHM550-EN
— Use cable that meets PROFIBUS specifications for
reliable RS485 communications.
— Ensure RS485 signals are not reversed.
— Ensure a PROFIBUS active terminator is fitted each
end of the RS485 bus segment.
— Route data lines clear of the source of any strong
electrical and magnetic fields.
Fig. 4.2: Navigator AWT540 PCB connections to PROFIBUS network
Data
signal Cable
color Description
A Green Negative (–) data line: connect to pin 8
on PROFIBUS DP equipment with 9-way
D-type connectors.
B Red Positive (+) data line: connect to pin 3 on
PROFIBUS DP equipment with 9-way
D-type connectors.
Braided
screen N / A Cable screen – usually connected to the
D-type shell or pin 1 on PROFIBUS DP
equipment with 9-way D-type
connectors.
Table 4.5: PROFIBUS DP data cable signals
COMM S
OUT 1 OUT 2
RELAY 1 RELAY 2 RELAY 3 RELAY 4
N L
IN
T
+24V
DIO1 DIO2 DIO3 DIO4 DIO5 DIO6
DIO CO
M
N/
C
CO
M
N/
C
N/
C
CO
M
N/
C
N/
C
CO
M
N/
C
N/
C
CO
M
N/
C 1 2 3 4 + – + – 5
COMMUNICATIONS
MODULE
SK1
SK4
SK2
FUSE RATING 3.15A (T) ~100 – 240V 50/60 Hz
I/O MODULE 2
RELAY
5
OUT 3 OUT 4
RELAY
6
CO
M
N/
C
CO
M
N/
C
ANALOGUE OUTPUT BOARD
CM40/0235
+
–
+
–
DUAL RS485 SMART
SENSOR INTERFACE BOARD
1 2 3 4 5
B (Red)
A (Green)
Screen