Omron R7M-A Series User Manual page 167

Distributor of Omron Automation & Safety: Excellent Integrated System Limited
Datasheet of R7D-AP01H - DRIVER SERVO 200V 100W
Contact us: sales@integrated-circuit.com Website: www.integrated-circuit.com
System Design and Installation
■ Improving Control I/O Signal Noise Resistance
Positioning can be affected and I/O signals can error if control I/O is influenced by noise. Follow the
methods outlined below for the power supply and wiring.
• Use completely separate power supplies for the control power supply (especially 24 V DC) and the
external operation power supply. In particular, be careful not to connect the two power supply
ground wires. Install a noise filter on the primary side of the control power supply.
• If Servomotors with brakes are used, do not share the 24-V DC power supply for brakes with the
24-V DC power supply for control I/O. Additionally, do not connect ground wires. Connecting ground
wires may cause I/O signal errors.
• As much as possible, keep the power supply for pulse command and deviation counter reset input
lines separate from the control power supply. Be particularly careful not to connect the two power
supply ground lines.
• It is recommended that a line driver be used for pulse command and deviation counter reset out-
puts.
• Always use twisted-pair shielded cable for pulse command and deviation counter reset signal lines,
and connect both ends of the shield to frame grounds.
• If the control power supply wiring is long, noise resistance can be improved by adding 1- µ F lami-
nated ceramic capacitors between the control power supply and ground at the Servo Driver input
section or the controller output section.
• For open-collector specifications, keep the length of wires to within two meters.
3-2-5 Conforming to EMC Directives
Conformance to EMC Directives (EN55011 class A group 1 (EMI) and EN61000-6-2
(EMS)) can be ensured by wiring under the conditions described below. These
conditions are for conformance of SMARTSTEP A-series products to EMC Directives.
EMC-related performance of these products, however, will vary depending on the
configuration, wiring, and other conditions of the equipment in which the products are
installed. The customer must, therefore, perform final checks to confirm that devices
and the overall installation conform to EMC Directives.
The following conditions must be met to conform to EMC Directives.
• The Servo Driver must be installed in a metal case (control panel). (The Servo Motor does not,
however, have to be covered with a metal plate.)
• Noise filters and surge absorbers must be installed on all power supply lines.
• Shielded cables must be used for all I/O signal lines and encoder lines. (Use tin-plated, soft copper
wires for the shield weaving.)
• All cables leaving the control panel must be wired in metal ducts or conduits with blades. (The 30-
cm power cable, encoder cable, and connector do not have to be inserted in metal ducts or con-
duits.)
• Ferrite cores must be attached to the shielded cable and the shield must be clamped directly to the
ground plate to ground it.
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Chapter 3