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Omron CJ1W-OD261 CJ-series 64-point NPN transistor output unit in the shipping carton with the type label visible

Omron CJ1W-OD261 — 64-Point NPN Output, 0.3 A / 6.4 A

SKU: CJ1W-OD261

USD 57.00

CJ-series 64-point NPN (sinking) transistor output unit, 0.3 A per point / 1.6 A per common / 6.4 A per unit, DC 12-24 V rated, Fujitsu-compatible connector.

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Product Overview

The Omron CJ1W-OD261 is the 64-point NPN (sinking) transistor output unit for CJ-series PLCs. It packs four commons of sixteen outputs each on a slim front face that occupies one slot on the CJ backplane, giving a high-density output block for solenoid banks, indicator stacks, and motor contactor coils in cabinets where panel real estate is the limiting factor. The unit runs on a separate DC 12-24 V load supply fed through the connector, with the logic supply taken from the CJ backplane.

How the OD261 fits in the OD2xx lineup

The OD2xx family is the CJ-series transistor output set. The last digit of the first group signals polarity: 1 = NPN (sinking, useful with Asian / DC-sinking inputs and with loads tied to +V), 2 = PNP (sourcing, useful with European / DC-sourcing inputs and with loads tied to 0 V). The middle digit sets the point count: OD201 / OD202 = 8 points, OD211 / OD212 = 16 points, OD231 / OD232 = 32 points, OD261 / OD262 = 64 points. The OD263 adds short-circuit and wire-break detection on top of the OD261 base for diagnostic panels. The OD2x4 family is the PNP short-protect counterpart. The OD211 / OD231 / OD261 do NOT have per-point short-circuit detection — add a per-point fuse block on the field side or step up to the OD213 / OD233 / OD263 for the diagnostic feedback.

Current budget and connector pin-out

Per point the OD261 sinks up to 0.3 A; per common (16 points sharing a single return) up to 1.6 A; per unit up to 6.4 A with all 64 points ON. Plan the field wiring so that the loads on any one common do not exceed 1.6 A combined, or the internal common fuse will clear. The Fujitsu-compatible connector on the front of the unit uses two 40-pin sockets (C500-CE241 or equivalent) to land the 64 outputs in two 32-conductor bundles. Pre-built cables XG5M-N1632 (3 m) and similar ship with discrete fork or M3.5 ring terminals on the field end — order the right cable length for the cabinet layout, not the shortest that fits.

Before ordering

Confirm the CJ rack has a free slot — the OD261 occupies one I/O slot on a CJ1M / CJ2M CPU rack or a CJ1W-IC101 / IC102 I/O expansion rack. The 5 VDC 170 mA internal draw comes from the CJ backplane; the external DC 12-24 V load supply (50 mA minimum idle per the datasheet) must be wired to the connector's V+ / V- pins, not back-fed through a load. For a PNP output pick the OD262; for an OD261 with short-circuit and wire-break detection, step up to the OD263.

Key Features

  • CJ1W-series CJ-bus digital output unit; one slot on CJ1M / CJ2M / CJ1W-IC10x racks
  • 64 transistor outputs in 4 commons of 16 points each
  • NPN (sinking) open-collector output; PNP-sourcing sibling is CJ1W-OD262
  • 0.3 A per point / 1.6 A per common / 6.4 A per unit continuous load
  • DC 12-24 V rated load (operating range 10.2 to 26.4 V)
  • 3.0 A per point inrush, 10 ms or less
  • Output residual 1.5 V max at rated load
  • 0.5 ms or less ON response / 1.0 ms max OFF response
  • Internal 5 VDC 170 mA max from CJ backplane
  • External 24 VDC 50 mA min supply for the load commons
  • Two Fujitsu-compatible 40-pin sockets (C500-CE241 family) on the front
  • 64 orange point-status LEDs and 4 red commons
  • Approvals: UL, CSA, cULus, CE, NK, Lloyds
  • 0 to +55 deg C operating
  • SKU: CJ1W-OD261
  • Series: CJ1W (CJ-bus I/O unit)
  • Voltage: 12-24 V
  • I/O: 64 I/O

Best-Fit Applications

  • 64-point output block for a high-density solenoid manifold on a multi-station assembly machine
  • Indicator stack driver on a process panel where each stacklight needs its own PLC-controlled bit
  • 64-coil sequential control on a packaging line or sorting conveyor with a single OD261
  • Replacement for two CJ1W-OD231 (32-point) units when one 64-point slot is more efficient on the rack
  • General-purpose DC load switching (relays, contactor coils, valve solenoids) in machines needing 64 outputs on one bus

Buying Checklist

  • Pick CJ1W-OD261 for a 64-point NPN output unit with 0.3 A per point — pick CJ1W-OD262 for the same 64 points in PNP (sourcing).
  • Pick CJ1W-OD231 (32-point NPN) when only 16-32 outputs are needed — saves slot cost and unused-points-to-trace time.
  • Pick CJ1W-OD263 (64-point NPN with short-circuit and wire-break detection) for diagnostic panels that need per-point fault feedback.
  • Pick CJ1W-OC201 (16-point relay output) when the load is mixed AC / DC or the inrush is over 3 A per point.
  • Plan the common-current budget at the field side: 1.6 A max per 16-point common — split loads across commons if a single stacklight or solenoid bank runs above 1.6 A combined.
  • Order the matching XG5M-N1632 pre-wired connector cables so that the field-end terminals are M3.5 fork or ring, not bare strands — saves an afternoon per rack.

Technical Specifications

Model CJ1W-OD261
Series CJ1W (CJ-bus I/O unit)
Type Transistor output unit, NPN (sinking) open collector
Output Points 64 (4 commons x 16 points)
Rated Load Voltage DC 12-24 V
Operating Load Voltage DC 10.2 to 26.4 V
Max Load Current 0.3 A per point / 1.6 A per common / 6.4 A per unit
Inrush Current 3.0 A per point, 10 ms or less
Leakage Current 0.1 mA or less (output OFF)
Residual Voltage 1.5 V or less at rated load
ON Response Time 0.5 ms or less
OFF Response Time 1.0 ms max
Internal Current Draw 5 VDC 170 mA max from CJ backplane
External Supply DC 10.2 to 26.4 V, 50 mA minimum
Connection Two Fujitsu-compatible 40-pin sockets (C500-CE241 family)
Indicators 64 orange point LEDs + 4 red commons
Mass ~250 g
Approvals UL, CSA, cULus, CE, NK, Lloyds
Operating Temperature 0 to +55 deg C
Operating Humidity 10 to 90 % RH (non-condensing)

FAQ for CJ1W-OD261

Is CJ1W-OD261 a 16-point, 32-point, or 64-point module?
64 point. The CJ1W-OD261 sits at the top of the CJ1W-OD2xx output family: OD201 / OD202 = 8 points, OD211 / OD212 = 16 points, OD231 / OD232 = 32 points, OD261 / OD262 = 64 points. The last digit of the first group signals the point count, and the 1 / 2 in the middle tells NPN / PNP. If you only need 16 or 32 outputs, the OD211 / OD231 are cheaper per point and leave the rack slot free for expansion.
What is the maximum current per point on the CJ1W-OD261?
0.3 A per point, with a per-common limit of 1.6 A across the 16 points on any one common, and a per-unit limit of 6.4 A across all 64 points ON simultaneously. The internal common fuse clears when any of these limits is exceeded — design the field wiring so the largest common load is under 1.6 A combined, including inrush where 3.0 A per point for 10 ms is acceptable but the average stays inside the continuous rating.
Does the CJ1W-OD261 need an external 24 VDC supply?
Yes. The unit draws 5 VDC logic power from the CJ backplane, but the load commons need a separate DC 10.2-26.4 V supply fed through the connector V+ / V- pins, with a minimum 50 mA idle to keep the output transistors biased correctly. Most cabinets feed this from the same S8FS or S8VK PSUs that power the field devices, not from the CPU power supply. Do not back-feed through a load — common-mode voltage drops cause false-ON faults on neighbouring commons.
What connector and cable fit CJ1W-OD261?
Two Fujitsu-compatible 40-pin sockets on the front of the unit, accepting the C500-CE241 connector or its XG4A / XG5 equivalents. Pre-assembled cable sets like the Omron XG5M-N1632 (3 m, 32 conductors per connector) ship with fork or M3.5 ring lugs on the field end, which saves the build time over hand-crimping individual terminals. For MIL 20-pin ribbon cable use the CJ1W-OD231 instead — the 32-point SKU uses the smaller MIL connector and a different cable family.

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