ABB DO815
ABB DO815 - Image 2

ABB DO815

Product Brief:​ The DO815 is an S800 I/O digital output module providing eight 24 V DC sourcing outputs, each capable of switching up to 2 A continuous. It is intended for directly driving larger 24 V DC loads such as hydraulic solenoid valves, large indicator beacons, or small DC contactors without intermediate interposing relays. Outputs are grouped in two isolated groups of four channels.

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Category: SKU: ABB DO815

Description

ABB DO815

  • Technical Specifications:
    • Output Voltage: 24 V DC (10–32 V DC range)
    • Channels: 8, in 2 isolated groups of 4
    • Output Type: High-side MOSFET, current sourcing (PNP)
    • Max Continuous Current: 2 A per channel @ 24 V DC; total module power dissipation limits apply
    • On-State Drop: <0.25 Ω typical
    • Short-Circuit / Overload Protection: Current-limited; auto-reset or latch (configurable fault mode)
    • Open-Load Detection: Detects disconnected load when output is ON (below threshold current)
    • OSP: Output Set-to-Predetermined state on error/comm loss (configurable)
    • Isolation: Group-wise isolated from ModuleBus (500 V AC test)
    • Power Dissipation: Typ. 4 W (fully loaded @ 2 A × 8 ch not simultaneously recommended — check thermal)
    • ModuleBus Current: +5 V typ. 120 mA, max 150 mA
    • Max Field Cable Length: 600 m
    • Operating Temp.: 0 °C to +55 °C (compact MTU vertical: max +40 °C — derate for high load)
    • Compatible MTUs: TU810, TU812, TU814, TU830, TU833
    • Keying Code: AA
    • Certifications: CE, UL/cUL, ATEX Zone 2, marine
  • Functional Features:
    • 2 A per channel eliminates need for interposing relay on medium-duty 24 V DC valves
    • Open-load and short-circuit diagnostics with per-channel error flag
    • Fault latch or auto-retry mode selectable
    • OSP configurable per application safety requirement
    • Undervoltage detection on process supply
  • Application Scenarios:
    • Direct drive of 24 V DC hydraulic / pneumatic solenoid valves (up to ~48 W coil)
    • Large 24 V DC warning beacons / stack lights
    • Small DC contactor coils (confirm inrush ≤ module capability — brief inrush tolerated)
    • Actuator clamp/unclamp solenoids on packaging machinery
  • Material & Structure / Working Principle / Installation:​ Same S800 form factor as DO810 — note:
    • Thermal Management:​ At 2 A continuous per channel, ensure cabinet ventilation — DO815 dissipates significantly more heat. In compact MTU vertical mount above +40 °C, derate to 1 A/ch or use interposing relay.
    • Inrush Current:​ Some solenoids have high inrush (holding ≈1 A, inrush 3–5 A for <100 ms) — DO815 tolerates brief inrush but verify against datasheet inrush spec (typically ≤10 A for <10 ms).
  • Precautions:
    • Do NOT exceed 2 A steady-state per channel — overcurrent triggers protection and may cause nuisance trips
    • For highly inductive loads >2 A inrush duration >spec, use interposing relay
    • Verify process supply can deliver total module load + margin (e.g., 8 × 2 A = 16 A theoretical — rarely all ON simultaneously but size supply accordingly)
    • Check MTU terminal current rating — some compact TUs have 10 A max per common terminal

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