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Omron NX1W-ADB21 — front face of the NX1W-series analog input option board showing the 35.9 x 35.9 mm square face, the screwless push-in 5-terminal block on the lower edge with V I1, I I1, V I2, I I2 and COM markings, the NX1W-ADB21 part-number label and the green CPU-link indicator on the upper edge

Omron NX1W-ADB21 — NX1 Analog Input Option, 2-Ch

SKU: NX1W-ADB21

USD 38.00

Omron NX1W-ADB21 NX1P2 analog input option board, 2 channels 0-10 V or 0-20 mA, 1/4000 resolution, screwless. In stock, China shipping.

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Product Overview

The Omron NX1W-ADB21 is the NX1W-series analog input option board for the NX1P2 CPU, manufactured by Omron Corporation. Hengyixin Automation stocks this I/O expansion unit in Xiamen and ships within 3-5 business days to most Asian, European, and North American ports.

It mounts in either of the two option slots on the front of an NX1P2 CPU and reads two single-ended analog signals. Each channel is software-switchable between voltage (0 to 10 V at 1/4000 full scale) and current (0 to 20 mA at 1/2000 full scale) from Sysmac Studio. Voltage input impedance is 200 kOhm min and current around 250 Ohm. Conversion is 2 ms per point. The inputs are NOT isolated from the CPU internal circuit.

Typical use is adding two pressure or flow signals to an NX1P2 machine controller without taking an NX I/O slot. For an analog output board in the same form factor, choose the NX1W-DAB21V. For RS-232C on the same NX1P2, choose the NX1W-CIF01.

Key Features

  • NX1W-series analog input option board for NX1P2 CPU, 2 single-ended channels on a screwless 5-terminal push-in block
  • Software-switchable per channel between 0 to 10 V at 1/4000 full scale and 0 to 20 mA at 1/2000 full scale
  • 2 ms per point conversion time (4 ms per unit), 200 kOhm min voltage input impedance, around 250 Ohm current input
  • No isolation from the CPU internal circuit, 35.9 x 35.9 x 28.2 mm, 24 g, AWG24 to AWG20 wire
  • SKU: NX1W-ADB21
  • Series: NX1W-series option board for NX1P2 machine automation controller
  • Voltage: 0 TO 10 V

Best-Fit Applications

  • Adding two 4-20 mA pressure-transducer inputs to an NX1P2-9024DT on a small machine where there is no room for an NX-AD2203 slice
  • Reading a single 0-10 V load-cell signal plus a 4-20 mA flow signal on an NX1P2-1040DT without taking up an NX I/O slot
  • Spare replacement on an existing NX1P2 panel where the original NX1W-ADB21 was lost during a previous service, keeping the same wiring plan

Buying Checklist

  • Pick the NX1W-ADB21 when the project needs two analog inputs on an NX1P2 CPU without using an NX I/O slot.
  • Pick the NX1W-DAB21V instead when the project needs two analog voltage outputs (0 to 10 V) on the same NX1P2.
  • Pick the NX1W-CIF01 instead when the option slot needs RS-232C serial communication, not analog input.

Technical Specifications

Manufacturer Omron Corporation (Japan)
Series NX1W-series option board for NX1P2 machine automation controller
Model / SKU NX1W-ADB21
Number of Inputs 2 analog inputs, single-ended
Voltage Input 0 to 10 V range, 1/4000 full scale resolution, 200 kOhm min impedance, input conversion range 0 to 10.24 V
Current Input 0 to 20 mA range, 1/2000 full scale resolution, approx 250 Ohm impedance, input conversion range 0 to 30 mA
Absolute Maximum Rating -1 to +15 V on voltage input; -4 to +30 mA on current input
Accuracy / Conversion Overall accuracy +/-0.5 percent full scale at 25 C; +/-1.0 percent full scale at 0 to 55 C; conversion time 2 ms per point (4 ms per unit); no averaging
Isolation No isolation from the CPU internal circuit; terminals isolated only from each other by design
Connection Screwless push-in 5-terminal block, AWG24 to AWG20 wire size
Dimensions / Weight 35.9 (W) x 35.9 (H) x 28.2 (D) mm; 24 g; power consumption included in the CPU
Mounting / Approvals Slides into option slot 1 or slot 2 on the front of an NX1P2 CPU; cULus Class I Div 2, CE, Lloyd, RCM, KC

FAQ for NX1W-ADB21

What is the Omron NX1W-ADB21 used for?
It is the NX1W-series analog input option board for the NX1P2 machine automation controller. It adds two single-ended analog inputs - software-switchable between 0 to 10 V and 0 to 20 mA - without using an NX I/O slot. Typical uses are pressure transducers, flow meters, and load cells on small NX1P2 machines.
Does the NX1W-ADB21 work with NX102 or NJ5 CPUs?
No. The NX1W-ADB21 is an option board that mounts only in the front option slot of an NX1P2 CPU. It cannot plug into an NX102 modular CPU or an NJ5 rack. For those, add an NX-AD2203 analog input slice to the NX I/O bus.
How do I switch between voltage and current on the NX1W-ADB21?
Wire the VI and II terminals together for the current configuration, leave them open for voltage, and select the input type per channel in the Sysmac Studio configuration. Short VI1 with II1 to use current on channel 1; short VI2 with II2 for channel 2. The hardware configuration has to match the Sysmac Studio setting.
Is the NX1W-ADB21 isolated?
No. The NX1W-ADB21 has no isolation between the analog inputs and the CPU internal circuit. The terminals are isolated from each other by design but share a common return with the CPU. For isolated analog inputs, use an NX-series NX-AD2203 or NX-AD2208 slice on the NX I/O bus instead.

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