TSDI-1648 Safe Digital Input FTA (48 V DC, 16 Channels)

The TSDI-1648 module is a field termination assembly (FTA) that interfaces between the system interconnection cable (SICC-0001/Lx) and external field wiring using screw terminals. Designed for digital input signals from Class I, Division 2 hazardous locations, this module is compatible with a redundant pair of SDI-1648 modules.

Key Features:

• Short Circuit Handling: Equipped with a Positive Temperature Coefficient (PTC) resistor to limit current and prevent the loss of all 16 channels in the event of a short circuit.
• Mounting: Universal snap-in provision for standard DIN EN rails.
• Connectivity: Screw terminals for secure field wiring connections.

Technical Data:

General:

• Type Numbers: FS-TSDI-1648, FC-TSDI-1648
• Approvals: CE, TUV, UL, CSA

Input:

• Number of Input Channels: 16
• Input Voltage: 48 V DC, -15% to +15%
• Input Current: ≤ 8 mA at 48 V DC (with a redundant pair of SDI-1648 modules as load)
• PTC Resistance: 1900 Ω ±25% at 25°C
• PTC (Steady) Current: Typical 17 mA ±35% at 48 V DC

Physical:

• Module Dimensions: 90 × 70 × 58 mm (3.54 × 2.76 × 2.28 in)
• DIN EN Rails: TS32 / TS35 × 7.5
• Used Rail Length: 91 mm (3.58 in)

Termination:

• Screw Terminals:
  • Max. Wire Diameter: 2.5 mm² (AWG 14)
  • Strip Length: 7 mm (0.28 in)
  • Tightening Torque: 0.5 Nm (0.37 ft.-lb)

The TSDI-1648 module provides a reliable and safe interface for digital input signals in hazardous locations, featuring robust short circuit protection and easy installation on DIN EN rails.