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DO Signal (SIS) 24V DC 3A Safety Relay

CZSR8402-1A is suitable for the application of DO signal from SIS, with 1 safety output contact (N/O). 


Double redundancy technology and contact welding protection technology are adopted inside. This intrinsically safe relay is specially designed for elevators and explosion-proof occasions.

  • DO Signal (SIS) 24V DC 3A Safety Relay
  • DO Signal (SIS) 24V DC 3A Safety Relay
  • DO Signal (SIS) 24V DC 3A Safety Relay
  • DO Signal (SIS) 24V DC 3A Safety Relay
  • DO Signal (SIS) 24V DC 3A Safety Relay
  • DO Signal (SIS) 24V DC 3A Safety Relay

Features & Advantages of DO Signal (SIS) 24V DC 3A Safety Relay

  • Intrinsically safe explosion-proof

  • Application of elevators

Parameter of DO Signal (SIS) 24V DC 3A Safety Relay


CZSR8402-1A
Supply voltage16V~35V DC
Current consumption≤80mA (24V DC)
Input current≤8mA (24V DC)
Cable resistance≤15Ω
Input devicesSafety switches
Number of contacts1NO
Contact materialAgSnO2
External contact fuse protection10A gL/gG NEOZED (NO)
Utilisation categoryIn accordance with EN60947-5-1:
AC-15,3A/230V; DC-13,3A/24V
Switch-on delay≤100ms
Delay-on de-energisation≤30ms
Recovery time≤30ms
Supply short interruption20ms
EMCEN60947, EN61000-6-2, EN61000-6-4
VibrationVibration frequency: 10Hz~55Hz;
Vibration amplitude: 0.35mm
Ambient temperature-20℃~+60℃
Storage temperature-40℃~+85℃
Relative humidity10%~90%
Overvoltage category
Pollution degree2
Rated insulation voltage250V AC
Rated impulse voltage6000V (1.2/50us)
Dielectric strength1500V AC, 1min
Clearance and creepage distanceIn accordance with EN 60947-1
Safety integrity levelSIL3
Explosion-proof certification[Ex ia Ga] IIC
Type tests certificate for special
equipment (elevator)
In accordance with GB 7588-2003,
EN 81-1 + A3


Block Diagram of DO Signal (SIS) 24V DC 3A Safety Relay


DO Signal (SIS) 24V DC 3A Safety RelayDO Signal (SIS) 24V DC 3A Safety Relay

Typical Applications of DO Signal (SIS) 24V DC 3A Safety Relay

DO Signal (SIS) 24V DC 3A Safety Relay

DO Signal (SIS) 24V DC 3A Safety Relay

DO Signal (SIS) 24V DC 3A Safety Relay

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