Carlo Gavazzi Safety Module Cat. 4, Emergency Stop and Safety Gate, Single/Dual Channels, Safety O/P: 3NO, Auxiliary O/P: 1NC, Start/Reset: Automatic/Manual, Self-Monitoring, 230VAC. Emergency Stop and Safety Gate modules according to EN 60204-1, EN 292-1/-2, EN 418 and EN 1088. This family of safety module in Safety Category 4, includes 24 Vac/Vdc, 110 or 230 Vac. Every model is characterized by dual channel input and safety output contacts with force guided relay outputs.