Allen-Bradley PowerFlex 7000 Series, Руководство пользователя

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Rockwell Automation Publication 7000-UM203C-EN-P - September 2018 19
Operation, Installation, and Wiring Chapter 3
Based on the type of input device that is upstream of the PowerFlex 7000, there
are requirements that must be met to insure proper operation of the STO
option.
Table 4 shows the required feedback contacts from the drive input
isolation device based on the input device option. For more details, see
publication
7000-AT002 and 7000-AT003 .
When using an Allen-Bradley Bulletin 1512 starter or if the starter is built into
the drive, a relay is added (CNT_AUX_RLY) and wired for the STO option
to generate the proper logic required to meet the feedback requirements. The
following shows the circuit used when the Allen-Bradley starter is external (see
Electrical Drawings).
Figure 3 - Allen-Bradley Drive Input Starter Circuitry Requirements for Safe Torque Off
ATTENTION: Do not use mechanically held input contactors as a drive input
isolation device. The safety system must be able to open the drive input
isolation device if a failure of the drive’s power structure is detected.
Table 4 - Feedback Contacts Based on Input Device
Input Option Auxiliary Contacts Required
by Drive without STO Option Auxiliary Contacts Required
by Drive with STO Option Notes
Starter/
Circuit
Breaker Isolation
Switch Starter/
Circuit
Breaker Isolation
Switch
Internal/External
Starter
(Allen-Bradley®
1512 with
IntelliVAC™)
(1)
(1) Additional relay for STO is mounted in the LV starter cabinet.
1 NO, 1 NC 3 NO, 1 NC 1 NO, 2 NC 3 NO, 2 NC Remaining spare
contacts on
contactor are 1 NO
and 1 NC for light
or aux relay options
External Starter
(Customer
Supplied) 1 NO 1 NO 2 NO, 1 NC 1 NO, 1 NC
Circuit Breaker
(Allen-Bradley or
Customer
Supplied) 1 pretrip, 1 NO N/A 1 pretrip, 1 NO,
1 NC N/A STO requires UV
relay to trip circuit
breaker in addition
to existing control
method from DIC
relay
Drive Input
Starter Feedback
Control
Supply