Category 0 Emergency Stop For Acs800-07/17/37 (+Q951, N×R8I); What This Chapter Contains; To Which Drives This Chapter Applies; Description - ABB ACS800 Series Hardware Manual

Category 0 emergency stop for ACS800-07/17/37
(+Q951, n×R8i)

What this chapter contains

This chapter describes the category 0 emergency stop function (+Q951). The
chapter deals with applicability, wiring, operation and use. Example circuit diagrams
are included.

To which drives this chapter applies

The chapter applies to the following drives:
Drive type Frame sizes
ACS800-07 n×R8i
ACS800-17 n×R8i
ACS800-37
2×R8i and up

Description

Category 0 definition

IEC/EN 60204-1 defines category 0 emergency stop as a stop by immediate
removal of power to machine actuators.

Implementation of category 0 stop in ACS800 in brief

Diode Supply System Board (DSSB) supplies ±24 VDC control voltage to the main
contactor control circuit. The emergency stop push-buttons are connected to this
circuit so that pressing a push-button starts a sequence which opens the line
contactors and the motor coasts to stop.
Option codes and descriptions
+F250+Q951 = line contactor + category 0 emergency stop
+F255+Q951 = air circuit breaker + category 0 emergency stop. ACS800-07:
available only with 6-pulse input and line fuses.
+F250+Q951 = line contactor + category 0 emergency stop
+F255+Q951 = air circuit breaker + category 0 emergency stop
Category 0 emergency stop for ACS800-07/17/37 (+Q951, n×R8i)
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