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Honeywell 8C-PDODA1

Product Name:​ Series 8 32-Channel 24 VDC Sourcing Digital Output Module (G3 coated)
Product Introduction:​ The 8C-PDODA1 (part number 51454472-175) is a 32-channel sourcing digital output module within the Honeywell Experion PKS C200/C300 platform. It switches reliable 24 VDC output signals to control process equipment, solenoid valves, interposing relays, and other discrete field devices. The module supports both internal (system-bus) and external field power excitation.
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Detailed content

Technical Specifications:
  • Output channels: 32 sourcing outputs
  • Output type: Sourcing (positive switching)
  • Module voltage: 24 VDC
  • Module current: 105 mA
  • Load voltage (max): 30 VDC
  • Max load current: 100 mA per channel; 3.2 A per module (max)
  • On-state voltage: 24 VDC typical (at 0.1 A max load current)
  • Off-state leakage: 5 µA max
  • Turn-on / turn-off time: 10 ms max
  • Redundancy switchover gap (output to field): 0 ms (none)
  • Galvanic isolation: 1000 VAC RMS or ±1500 VDC
  • Hot-swap under power: Supported
  • Weight: 0.34 kg
  • Dimensions: approx. 60 × 152 × 143 mm
  • Operating temperature: 0 °C to +60 °C
Functional Features:
  • Per-channel configurable output modes: direct, reverse, latched, pulsed, and pulse-width-modulated (PWM)
  • Optional redundancy enables seamless output switchover with no current interruption
  • Configurable FAILOPT per channel — output can HOLD THE LAST VALUE or SHED TO A SAFE VALUE (user-configured)
  • Galvanic isolation protects the C300 controller from field transients and ground loops
  • Extensive internal diagnostics
  • Bussed output architecture: all outputs share a common return; the IOTA wiring option selects between system-bus-referenced and external-field-power-referenced operation
  • G3 conformal coating on the “8C” variant
Application Scenarios:​ Control of solenoid valves, interposing relays, motor starters, and other process equipment requiring stable 24 VDC sourcing output in industrial automation systems. Typical deployments include chemical plants, refineries, power stations, and offshore platforms.
Structural & Material Characteristics:​ The module adopts the Series 8 slim vertical form factor. Internally it contains 32 sourcing output drivers with optical isolation barriers. The accompanying IOTA distributes field power (selectable internal/external) and provides screw terminals for field wiring. The common return is shared across all 32 channels (bussed architecture).
Working Principle:​ The C300 controller issues a discrete output command over the I/O Link. The module’s output driver sources 24 VDC from the selected field-power source (system bus or external supply) through optical isolation to the field device. The IOTA’s wiring configuration determines the reference; when external field power is selected, the outputs become galvanically isolated from the Series 8 power system.
Installation Requirements:
  • Mount on a compatible Series 8 DO IOTA
  • Select field power source via IOTA wiring: internal (system bus) or external 24 VDC
  • Ensure total module load current does not exceed 3.2 A; per-channel load ≤ 100 mA
  • Maintain ≤ 30 VDC on load side
Usage Notes:
  • For redundant operation, install a second 8C-PDODA1 on a redundant IOTA — switchover occurs with 0 ms current gap
  • Configure FAILOPT behavior per channel to match process safety requirements (hold vs. shed-to-safe)
  • Hot-swap is supported; however, verify redundancy before extracting a module from a live loop
  • Do NOT exceed 30 VDC load voltage or 100 mA per channel

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