23
Wiring the RS-422/RS-485 Devices
Section 2-3
2-2-3
Wiring the Power Terminals
• Supply power to the Unit using the 2 pin power connector provided with
the Unit.
• When wiring the power, observe the required polarity. Failure to do so can
damage the Unit.
• Use a Phillips screw driver to tighten the connector screw, using a torque
value between 0.25 and 0.3 N·m.
2-3
Wiring the RS-422/RS-485 Devices
2-3-1
Precautions when wiring
• Always switch off the power to the Unit and to the RS-422 / RS-854
devices, before wiring.
• Make sure that no foreign objects enter the Unit when wiring. Failure to do
so, may damage the Unit when power is applied.
• Use a Phillips screw driver to secure the network connector to the Unit
after setting up the RS-422 / RS-485 network. Tighten the screws to a
torque of 0.25 to 0.3 Nm.
2-3-2
2-Wire and 4-Wire Connections
The transmission circuits for 2-wire and 4-wire connections are different, as
shown in the following diagram.
Note
1.
Use a 2-wire transmission circuit to connect E5_N, E5ZN and E5_R Tem-
perature Controllers to the PROFIBUS-DP Gateway Unit. Use a 4-wire
transmission circuit to connect the R88A-MCW151-E Motion Control op-
tion Board to the PROFIBUS-DP Gateway Unit. Use the same transmis-
sion circuit (2-wire or 4-wire) for all nodes.
2.
Do not use 4-wire connections when the 2/4-wire switch on the PROFI-
BUS-DP Gateway Unit is set to 2-wire.
3.
Do not intermix Temperature Controllers and R88A-MCW151-E devices
on one and the same transmission circuit.
4.
In case the PROFIBUS-DP Gateway Unit is on one of the ends of the
transmission network, switch on the Termination Resistor - by setting
Switch 2 to ON.
Example of 4-Wire
Connections
Example of 2-Wire
Connections
2/4-wire switch
PRT1-SCU11
2/4-wire switch
PRT1-SCU11
Not connected
R88A-
MCW151-E
E5ZN
E5_N
R88A-
MCW151-E