E-STOP (9-pin 'D' plug)
The E-STOP connector is provided to allow connection of an external EMERGENCY STOP switch into the SPA3. The machine manufacturer or product installer must perform a risk assessment to determine the requirements for emergency stopping and emergency switching off. The SPA3 emergency stop safety system is designed to achieve category 2 or category B implementation as selected by the installer's risk assessment (refer to BS EN ISO13849-1:2008 para. 5.2.2.).
The connection on the SPA3 is a 9WD plug connector with the following connections:
E-STOP A1 (+24V)
E-STOP RESET "A"
E-STOP A2 (+24 V)
E-STOP electrical characteristics
Any emergency stop components fitted to this connector must have the following electrical characteristics:
Emergency stop system voltage : 24 V
Emergency stop system current : 300 mA max
All connections to this connector should be fitted by a competent technician or engineer and all wires should be sleeved. Any emergency stop devices added to the E-STOP chain should meet the requirements of IEC 60947-5-1 (Low-voltage switchgear and control gear – Part 5-1: Control circuit devices and switching elements – Electromechanical control circuit devices) or UL1054 (Standard for special-use switches).
If indicated by the user's risk assessment, a ‘manual reset' button (refer to BS EN ISO13849-1:2008 para. 5.2.2.) should be included in the emergency stop system. A reset switch is required when there is limited visibility of the danger zone from the control position. The reset switch must be positioned outside the danger zone and in a safe position from which it may be determined that no person is within the danger zone before resetting the safety system.
E-STOP with reset implementation
There are five methods of implementing the E-STOP circuit;
Single pole E-STOP button with reset
Dual pole E-STOP button with reset
E-STOP without reset implementation
Single pole E-STOP button without reset
Dual pole E-STOP button without reset
UCC2-2 installations require a special E-STOP cable (part number A-5629-0090). This cable has three tails, all marked with their function and must be installed as per the diagram below. All E-STOP schemes connect to the cable marked 'external E-STOP' including all bypass plugs.