Product Features JSDPC-1000 dynamic relay, JSDPC-820 dynamic relay, and JSDPC-830 dynamic relay were once used in microcomputer interlock interface circuit. At present, JSDPC-1000 dynamic relays, JSDPC-820 dynamic relays, and JSDPC-830 dynamic relays have ceased to be used on large railways, and are only used in hump circuits when users require them. Features 1. Two-way dynamic control signal relay. 2. Controlled by dynamic pulse signal. 3. Dynamic pulse control signal: JSDPC-1000 dynamic relay is 24V, 2.5Hz. JSDPC-820 dynamic relay is 24V, 1Hz. JSDPC-830 dynamic relay is 24V, 5Hz.