Honeywell TC-IDD321 Experion C200 / C300 Series
The Honeywell TC-IDD321, also cataloged as the TC-IDD321 Discrete Input Module, operates as a dedicated hardware component for sensing 32 discrete DC input signals within Honeywell Experion Process Knowledge System (PKS) networks.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | TC-IDD321 |
| Brand | Honeywell |
| Origin | USA |
| Weight | 0.55 lbs |
| Dimensions | Standard C200 I/O Chassis Slot Width |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 6.1 W maximum (Power Dissipation) |
| Number of Inputs | 32 points (16 points per common) |
| Nominal Input Voltage | 24 VDC |
| On-State Voltage Range | 10 to 31.2 VDC @ 60 deg C |
| On-State Current (Minimum) | 2 mA |
| Off-State Voltage (Maximum) | 5 VDC |
| Off-State Current (Maximum) | 1.5 mA |
| Isolation Voltage | Channel-to-channel: 1500 VDC for 1 second; User-to-system: 1500 VDC for 1 second |
| Input Delay Time (Off to On) | 1 ms maximum plus programmable filter (0 ms, 1 ms, or 2 ms) |
| Input Delay Time (On to Off) | 1 ms maximum plus programmable filter (0 ms, 1 ms, 2 ms, 9 ms, or 18 ms) |
| Inrush Current | 250 mA peak (decaying to < 37% in 22 ms) |
| Input Compatibility | IEC Type 1+ |
| Terminal Block Connection | TC-TBCH (36-position terminal block) |
Channel-to-Channel Galvanic Isolation & Fieldbus Signals
To secure stable 4-20 mA HART loop protocol handling and discrete signal processing across hostile process automation environments, the module incorporates 100% factory-tested 1500 VDC galvanic isolation between channels and system backplanes. By preventing ground loops and suppressing high-voltage common-mode transients from remote field switches, the internal optical barriers preserve digital signal integrity before passing raw contact data to the controller rack.
Frequently Asked Questions
Q: What terminal block model must field technicians use to wire signals to this card?
A: The module accepts the 36-position TC-TBCH removable terminal block, which allows field technicians to wire up to 32 discrete 24 VDC inputs across two separate 16-point commons.
Q: How does the configurable input delay filter affect physical signal processing?
A: Field engineers can program software filter delays ranging from 0 ms up to 18 ms to prevent contact bounce or electrical noise on field switches from falsely triggering discrete input states.
Field Installation Guidelines
During field installation, technicians must firmly seat the module into the C200 chassis slot before tightening the TC-TBCH 36-position terminal block screws. Maintain strict physical separation between high-voltage AC lines and 24 VDC discrete signal wiring to prevent inductive coupling. Connect all field signal shields directly to a single, low-impedance earth ground point at the panel entrance, ensuring shield continuity without forming ground loops across isolated input channels.
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| Condition | 100% New with Original Package |
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| Shipping Port | ShangHai, Xiamen |
| Warranty | 12 Months |
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