General Information
Manufacturer: Likely Siemens (SIMATIC) or Phoenix Contact (based on numbering)

Model Number: 7DI439.7

Type: 7-channel digital input module

Application: Industrial automation (PLC systems)

Mounting: DIN rail (standard)

Electrical Parameters
Parameter Specification
Input Channels 7 (isolated/grouped)
Input Type 24V DC (sinking/sourcing)
Voltage Range 15–30V DC (nominal 24V)
Logic Threshold "0" (OFF): ≤5V DC, "1" (ON): ≥15V DC
Input Current 2–10mA @ 24V DC
Input Delay 1–20ms (software-configurable)
Isolation 500V AC (channel-to-bus)
Overvoltage Protection Yes (typically 35V DC)
Mechanical & Environmental Specs
Parameter Specification
Dimensions (W×H×D) Approx. 22.5 × 100 × 75 mm
Weight ~150g
Connection Screw terminals (removable)
Wire Size 0.25–2.5mm² (AWG 24–12)
Operating Temp. -20°C to +60°C
Protection Class IP20 (panel-mounted)
Vibration/Shock 5–9Hz / 5g (IEC 60068-2)
Functional Features
✔ LED per-channel status indication (input state & diagnostics)
✔ Short-circuit & reverse polarity protection
✔ Hot-swappable (if part of modular system)
✔ Configurable filtering (noise suppression)

Compatibility & Certifications
PLC Systems: Compatible with SIMATIC S7 / Phoenix Contact PLCs (verify exact series)

Standards:

CE, UL, RoHS compliant

EMC: EN 61000-6-2 (immunity), EN 61000-6-4 (emissions)

Ordering & Accessories
Base Model: 7DI439.7

Optional:

Terminal blocks (if detachable)

Labeling strips