Configured for discrete and analog signal processing in automated machinery, the Omron CP1E-NA20DR-A (CP1E-NA20DR-A CPU Unit Hardware) provides direct physical/electrical execution.

Technical Identifier Matrix

• Base Model Family: CP1E

• Class Classification: NA (Application model with built-in analog I/O)

• Discrete I/O Points: 20 (12 DC inputs, 8 relay outputs)

• Integrated Analog I/O: 2 Analog Inputs / 1 Analog Output

• Input Hardware Type: 24 VDC inputs

• Output Hardware Type: Electromechanical relay outputs

• Power Supply Rating: 100 to 240 VAC

Hardware Specifications

Omron PLC Processing Velocity & Signal Density

The CP1E-NA20DR-A integrates both discrete I/O channels and analog processing circuits directly onto the main system board, routing physical I/O through high-speed internal bus traces. Signal acquisition and internal A/D-D/A conversion execute without requiring peripheral expansion modules, eliminating backplane transmission latencies. Program execution logic updates via cyclic scanning with immediate I/O refreshing, maintaining deterministic instruction cycle execution while processing 2 analog inputs, 1 analog output, and 20 discrete points within a compact physical layout.

Package Contents & Ordering Information

• 1x Omron CP1E-NA20DR-A CPU Unit

• 1x Terminal block protective cover plate

• 1x Hardware installation instruction sheet

Field Installation Guidelines

• DIN Rail Mounting: Mount the controller on a standard 35 mm DIN rail (TH35-7.5/TH35-15). Ensure a minimum clear space of 50 mm above and below the module for natural thermal convection.

• AC Mains Wiring: Connect 100 to 240 VAC mains power conductors to terminals L1 and L2/N using AWG 14 to AWG 18 wire gauges. Tighten M3 terminal screws to 0.5 N m torque.

• Analog Signal Wiring: Route analog input and output cables using twisted pair shielded wiring. Ground the shield at the PLC functional ground (FG) terminal only to avoid circulating ground loops.

• Earthing Connection: Connect the functional ground (FG) terminal directly to a dedicated earth electrode with a resistance below 100 Ohm, using a conductor cross-section of at least 2.0 mm2.

Frequently Asked Questions

• Is hot-swapping permitted for wiring terminal blocks on the CP1E-NA20DR-A CPU?

  No. Main AC supply power and external I/O power must be fully isolated before connecting or removing field wiring on the integrated terminal block screws.

• What range settings are supported by the integrated analog input channels?

  Inputs support 0 to 5 V, 1 to 5 V, 0 to 10 V, 0 to 20 mA, and 4 to 20 mA ranges configurable via system memory registers and DIP switch hardware settings.

• What is the digital conversion resolution for the integrated analog channels?

  The internal A/D and D/A converters process analog signals with a full-scale digital resolution of 1/6000 (0 to 6000 binary representation in memory).

• Can the relay outputs switch DC load voltages directly without external suppression?

  Relay contacts switch up to 2 A at 24 VDC resistive, but inductive DC loads require freewheeling diode clamping across the load to prevent arc damage.

• What digital input filtering delay is supported on the 24 VDC inputs?

  Input response filters are software-configurable in the PLC setup memory from 0 ms up to 32 ms to eliminate mechanical switch chatter noise.

• How are analog input and output values mapped into the CPU memory words?

  Analog input signals automatically map into specific CIO registers, with converted values updating continuously during the common execution scan cycle.

• What wire conductor range fits the CPU main terminal block assembly?

  The terminal screws accommodate solid or stranded copper wire sizes ranging from 0.08 mm2 to 2.0 mm2 (AWG 28 to AWG 14) fitted with crimp ferrules.

• What thermal derating rules apply when operating at 55 deg C ambient temperature?

  At 55 deg C operating temperature, the simultaneous ON ratio of all combined digital input and relay output channels must be derated to 80 percent maximum.