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6.3 Connecting the bus coupler electrically
Applied electric voltage
Danger of injury from electric shock
Make sure the relevant system component is not under voltage or pressure
u
before electrically connecting modules to the valve terminal.
Faulty wiring
Faulty wiring can lead to malfunctions as well as damage to the network.
Unless otherwise stipulated, comply with the directive Network Infrastruc-
u
ture for EtherNet/IP™ Publication Number: PUB00035R0.
1. Only a cable that meets the fieldbus specifications as well as the connection
speed and length requirements should be used.
2. In order to assure both the protection class and the required strain relief, the
cable and plug assembly must be done professionally and in accordance with
the assembly instructions.
Current flow in shield due to differences in potential
Compensating currents caused by differences in potential must not flow over
the shield of the bus cable, as this will remove the shielding, which could dam-
age the line and connected bus coupler.
If necessary, connect the measuring points for the system using a separate
u
line.
6.3.1 General notes on connecting the bus coupler
Use pre-assembled plug connections to connect the modules.
Observe the pin assignment in the following table if you do not use pre-as-
u
sembled plug connections and cables.
Table 3: X71 pin assignment (RS232), M12, 5-pin
Pin
Signal
Meaning
1
nc
Not Connected
2
nc
Not Connected
3
RXD
Received data
4
GND
Reference potential to 0 V
5
TXD
Transmission data
Table 4: X72 pin assignment (BUS), M12, D-coded
Pin
Signal
Meaning
1
TD+
Transmit pos.
2
RD+
Receive pos.
3
TD-
Transmit neg.
4
RD-
Receive neg.
1
TD+
Transmit pos.
The connection technology and plug assignment comply with the
specifications in the technical guidelines Network Infrastructure for
EtherNet/IP™ Publication Number: PUB00035R0.
AVENTICS™ EtherNet/IP™ | R412012728-BAL-001-AD | English
CAUTION
NOTICE
NOTICE
2
1
3
4
5
1
2
4
5
3
6.3.2 Connecting the bus coupler
1 X72 bus cable
1. Set up the correct pin assignment on the plug connections if you do not use
pre-assembled cables. See g Table 4.
2. Connect the incoming bus connection to X72 (1) and connect the module
with a hub or switch if further participants are to be connected.
3. Provide the X71 plug (2) with a cover cap.
4. Connect the shield on both sides of the bus cable directly to the plug housing
(EMC housing) if self-assembled cables and plugs with metal housing are
used.
This protects data lines from terminal interference.
5. Ensure that the plug housing is securely fitted to the bus coupler housing.
6.3.3 Connecting the bus coupler logic and load supply
Operating voltage is supplied to the valves and the bus coupler via the X10
(POWER) plug.
When connecting the logic and load supply of the bus coupler, ensure pin assign-
ment according to the following table.
Fig. 6: X10 plug (Power)
Table 5: Assignment of the X10 (POWER) plug, M12, A-coded
Pin
X10
Assignment
1
U
Power supply for bus coupler logic and sensor supply for digital in-
L
put modules
2
U
First valve power supply
Q1
3
OV
Ground for U
4
U
Second valve power supply
Q2
• U
, U
and U
are galvanically connected to one another.
L
Q1
Q2
• Groups of valves can be supplied with power via the U
plies.
• The S4, S5, and S6 sliding switches are used to assign the valve groups (4 or 8
valves). See section g 7.1.1. Assigning the valve supply. It is therefore possi-
ble to switch off the valves before or after an emergency OFF.
The power supply cable must fulfill the following requirements:
• Cable socket: 4-pin, A-coded without center hole
• Cable cross section: > 0.5 mm
• Length: Max. 20 m
Table 6: Current consumption on X10 (POWER) on bus coupler
Signal
Assignment
U
Logic supply and input
L
U
Valves
Q1
U
Valves
Q2
A standard power pack can supply all system components with 24 V.
2
1
2 X71 plug
POWER
X10
2
1
3
4
U
and U
L,
Q1
Q2
and U
Q1
2
per wire
Total current
Max. 1 A
Max. 1 A
Max. 1 A
valve sup-
Q2
22
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