Honeywell FS-TSDI-1624 Safe Digital Input FTA Module

The Honeywell FS-TSDI-1624 is a field termination assembly module designed to serve as the interface between the system interconnection cable (SICC-0001/Lx) and external field wiring through screw terminals. This module effectively connects to redundant pairs of SDI-1624 modules and is suitable for digital input signals from Class I, Division 2 hazardous locations.

Key Features

• Short Circuit Protection: The module incorporates a PTC (Positive Temperature Coefficient) resistor between the +24V output of the SDI-1624 modules and the input channels, limiting current and preventing total channel failure in case of a short circuit to 0 Volt.
• DIN Rail Mounting: Universal snap-in provision for standard DIN EN rails, facilitating easy installation.

Specifications

General:

• Type Numbers: FS-TSDI-1624, FC-TSDI-1624
• Approvals: CE, TUV, UL, CSA, FM²

Input:

• Number of Input Channels: 16
• Input Voltage: 24 Vdc, -15% to +30%
• Input Current: ≤ 15 mA at 24 Vdc (with redundant SDI-1624 modules)
• PTC Resistance: 260 Ω ± 25% at 25°C
• PTC (Steady) Current: Typ. 45 mA ± 35% at 24 Vdc

Physical:

• Module Dimensions: 90 x 70 x 58 mm (L x W x H)
• DIN EN Rails: TS32/TS35 x 7.5
• Used Rail Length: 91 mm

Termination:

• Screw Terminals:
  • Max. Wire Diameter: 2.5 mm² (AWG 14)
  • Strip Length: 7 mm
  • Tightening Torque: 0.5 Nm

Field Signal Specifications for Non-Incentive Field Circuits Class 1 Division 2:

Hydrogen (Group A & B):

• Max. Closed Loop Resistance: 10 Ω
• Min. Open Loop Resistance: 15 kΩ
• Max. Supply Voltage: 28.8 Vdc
• Max. Loop Inductance: 3 mH
• Max. Loop Capacitance: 0.3 μF

Hydrogen (Group C & D):

• Max. Loop Inductance: 10 mH
• Max. Loop Capacitance: 6 μF

Notes:

• FS-type Modules: Non-conformal coated modules.
• FC-type Modules: Conformal coated modules.
• FM Approval: Pending at the time of this information release; for updates, please contact Honeywell SMS.

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