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(Standard to comply with: UL 508C, CSA C22.2 No. 14)
1. General precaution
The bus capacitor discharge time is 10 minutes. Before starting wiring or inspection, switch power off, wait for more than 10 minutes,
and check for residual voltage between terminal P/+ and N/- with a meter etc., to avoid a hazard of electrical shock.
2. Installation
The below types of drive unit have been approved as products for use in enclosure and approval tests were conducted under the
following conditions. Design the enclosure so that the surrounding air temperature, humidity and ambience of the drive unit will
satisfy the specifications. (Refer to page 38)
Wiring protection
Integral solid state short circuit protection does not provide branch circuit protection. Branch circuit protection must be provided in
accordance with the National Electrical Code for the U.S. or the Canadian Electrical Code for Canada and any additional codes. As
specified, UL Class T fuses or any faster acting fuse with the appropriate rating or Listed UL 489 Molded Case Circuit Breaker
(MCCB) must be employed. (Refer to page 43)
3.Short circuit ratings
Suitable For Use in A Circuit Capable of Delivering Not More Than 100 kA rms Symmetrical Amperes, 264 V Maximum.
4. Wiring
⋅ The cables used should be 75°C copper cables.
⋅ Tighten the terminal screws to the specified torques.
Undertightening can cause a short or misoperation.
Overtightening can cause the screws and unit to be damaged, resulting in a short or misoperation.
⋅ Use the UL approved round crimping terminals. Crimp the terminals with the crimping tool recommended by the terminal
manufacturer.
5. Motor overload protection
When using the electronic thermal relay function as motor overload protection, set the rated motor current to Pr. 9 "Electronic thermal
O/L relay". (Refer to page 43.)
Check the SERIAL number indicated on the drive unit rating plate or package. (Refer to page 1)
Appendix 2 Instructions for UL and cUL
Appendix 3 SERIAL number check
Rating plate example
{ { {{{{{{
Symbol Year Month Control number
SERIAL (Serial No.)
The SERIAL consists of one symbol, two characters indicating the production year and month, and six characters indicating the control number.
Last digit of the production year is indicated as the Year, and the Month is indicated by 1 to 9, X (October), Y (November), and Z (December).