Overview

The SLC284 Safety Digital Input Module is designed to operate as a safe, modern, and independent safety controller, ideally integrated into the M200 Controller. It complies with IEC 61508 safety standards and supports communication with safety I/O modules such as SDI208 and SDO204 without additional cabling. The modules can be distributed and separated by several hundred meters, operating via:

• Bus Expansion
• FASTBUS
• CAN
• Bluecom

Specifications

Processor

• CPU: Dual LPC2468 processors, 72 MHz, 32-bit

Controller

• Programming Interface:
  • Via controller (I/O bus)
  • Serial interface (COM)
• Number of Independent Safety Programs per SLC: 1
• Program Cycle: Minimum 5 ms

I/O Expansion

• Compatible with SDI208, SDO204, or SCT202 modules

Digital Inputs

• Quantity:
  • 16 digital inputs (redundantly usable in pairs, PL e / SIL 3 / Cat 4)
• Input Voltage Range:
  • High (H): 15 V DC to 34 V DC
  • Low (L): -34 V DC to +5 V DC
• Input Delay:
  • Hardware: 300 µs (typical)
  • Software: 1 ms (typical, with disabled test pulsing)
• Input Type: IEC 61131-2 Type 1
• Minimum Input Current: 3.5 mA at 24 V DC
• Status Indication: Green LED
• Error Monitoring: Internal function monitoring; optional external test pulsing

Digital Outputs

• Quantity:
  • 8 digital outputs (redundantly usable in pairs, PL e / SIL 3 / Cat 4)
• Output Voltage Range: 18 V DC to 34 V DC
• Output Current per Channel: 0.5 A nominal
• Total Current per Group (Max): 2 A
• Switching Delays:
  • 0 to 1: Max. 35 µs at full load
  • 1 to 0: Max. 155 µs at full load
• Output Groups: 2 (with electronic fuse)
• Switching Frequency (Max, Resistive Load): 500 Hz
• Status Indication: Green LED
• Error Monitoring: Short-circuit, overload, undervoltage, overvoltage of power supply
• Emergency Shut-Off: Configurable per output from 0 s to 1800 s (100 ms resolution). Emergency shut-off activates on communication or supply voltage failure.

Internal Power Supply

• Galvanic Isolation:
  • System: 500 V
  • Between Groups: 500 V
• Source: Backplanes BS2xx
• Internal Current Consumption: 5 V / 550 mA via backplane

External Power Supply

• Protection: Reverse polarity
• Input Voltage: 24 V DC (18 V to 34 V)
• Current Consumption:
  • Typical: 95 mA at 24 V DC + Σ current consumption of actuators and sensors

Connection Type

• I/O Connection: RM 3.5 connector with flange
• Power Supply Connection: RM 5.08 connector with flange
• Terminal Type: Screw or spring terminal, connectors are codable and labelable