SLC-2A1B24N Safety Relay

■ Features

■ Characteristic Description

• The safety relay operates with a DC24V power supply.
• It has two sets of normally open safety contacts in series output and one set of normally closed auxiliary contacts in parallel output.
• It operates in dual-channel mode with NPN dual-channel input, and can be switched between manual reset and automatic reset.
• It has power indicator lights and status indicator lights for Channel 1 and Channel 2.
• The number of safety contacts can be increased through expansion modules.

■ Safety Features

• Compliant with standards EN60947-5-1, EN61000-6-2, EN61000-6-3, EN60204-1, ENISO13849-1.
• Safety level is rated as level 4.
• The circuit includes a self-monitoring redundant circuit.
• Even if one component is damaged, the safety function remains effective.
• The safety function of the relay can be automatically detected through proper opening and closing during each switching cycle.

■ Operation Modes
· Input Circuit: Dual-channel NPN input, signals connected to S1 and S2.
· Reset Circuit: Provides feedback control loop for monitoring external contactor/relays.
Automatic reset by shorting S33 and S34.
Manual reset by connecting reset button to S33 and S34.

■ Performance Parameters

Power Supply
Supply Voltage: DC24V
Voltage Tolerance: 85-110%
Power Consumption: 3W

Input
Input Voltage: DC24V
Input Current: Maximum 100mA
Input Method: NPN dual-channel input
Maximum Cable Resistance in Input Circuit: 100Ω

Output
Output Method: Relay passive contact output
Output Contacts: 2 normally open, 1 normally closed
Contact Fuse Protection: 4A T or 6A T
Maximum Switching Capacity (AC): AC-15, 2A/250V
Maximum Switching Capacity (DC): DC-13, 3A/24V
Contact Material: Silver alloy, gold-plated
Contact Life: ≥10 million cycles

Time
Response Time: ≤20ms
Automatic Reset Time: ≤35ms
Manual Reset Time: ≤30ms
Release Buffer Time: ≤10ms
Maximum Power Interruption before Power Failure: ≤1s

Mechanical Data
Housing Material: ABS engineering plastic
Mounting: 35mm DIN rail
Maximum Wire Size: 0.2-2.5mm²
Terminal Torque Setting: 0.5Nm
Wiring Method: Terminal block connection

Environment
Vibration Resistance: 10-55Hz, 1.5mm
Operating Temperature: -25 to +70°C (non-freezing)
Relative Humidity: 35-95%RH
Protection Level: IP50