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Wiring the RS-422A / RS-485 Devices
2-3
Wiring the RS-422A / RS-485 Devices
2-3-1
Precautions When Wiring
2-3-2
2-Wire and 4-Wire Connections
2-3-3
Connection for E5_N Compoway-F Communications
24
• Always switch off the power to the Unit and to the RS-422A / 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-422A / RS-485 network. Tighten the screws to a
torque of 0.25 to 0.3 Nm.
The transmission circuits for 2-wire and 4-wire connections are different, as
shown in the following diagram.
Example of 4-Wire
Connections
2/4-wire switch
R88A-
MCW151-E
PRT1-SCU11
Note
1. Use a 2-wire transmission circuit to connect E5_N, E5ZN and E5_R Tem-
perature Controllers to the PRT1-SCU11. Use a 4-wire transmission circuit
to connect the R88A-MCW151-E Motion Control option Board to the
PRT1-SCU11. Use the same transmission circuit (2-wire or 4-wire) for all
nodes.
2. Do not use 4-wire connections when the 2/4-wire switch on the PRT1-
SCU11 is set to 2-wire.
3. Do not intermix Temperature Controllers, R88A-MCW151-E devices and
F7-Inverter devices on one and the same transmission circuit.
4. In case the PRT1-SCU11 is on one of the ends of the transmission net-
work, switch on the Termination Resistor - by setting Switch 2 to ON.
The E5AN / E5CN / E5EN / E5GN Temperature Controllers all use Compo-
way-F communications over 2-wire RS-485.
• The RS-485 connection can be either one-to-one or one-to-N. Up to 15
E5_N units can be connected in a one-to-N system.
• The total cable length is 500 m max.
• Use a shielded twisted-pair cable with wires of a thickness of AWG24
2
(0.205 mm
) to AWG14 (2.081 mm
Example of 2-Wire
Connections
2/4-wire switch
R88A-
MCW151-E
PRT1-SCU11
2
)
Section 2-3
E5_N
E5ZN
Not connected
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