{"product_id":"omron-cj1w-prm21-remote-i-o-communication-unit-cj-series","title":"Omron CJ1W-PRM21 Remote I\/O Communication Unit CJ Series","description":"\u003cp\u003eThe \u003cstrong\u003eOmron CJ1W-PRM21\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eCJ1W-PRM21\u003c\/strong\u003e Remote I\/O Communication Unit, operates as a dedicated hardware component for PROFIBUS DP master interface execution within Omron CJ-series and NJ-series controller platforms.\u003c\/p\u003e\n\u003ch3\u003eTechnical Identifier Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase Part Number:\u003c\/strong\u003e CJ1W-PRM21\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Omron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClassification:\u003c\/strong\u003e CPU Bus Unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Version:\u003c\/strong\u003e 3.0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Address Range:\u003c\/strong\u003e 0 to F (Hex)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eCJ1W-PRM21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eOmron\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.10 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e3.1 cm x 9.0 cm x 6.5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e15.0 cm x 10.0 cm x 5.0 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e2.0 W (400 mA at 5 VDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e400 mA max at 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePROFIBUS Standard\u003c\/td\u003e\n\u003ctd\u003eEN50170, Volume 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtocols Supported\u003c\/td\u003e\n\u003ctd\u003ePROFIBUS DP, PROFIBUS DP-V1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePROFIBUS Role\u003c\/td\u003e\n\u003ctd\u003ePROFIBUS DP-V1 Class 1 and Class 2 Master\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhysical Layer\u003c\/td\u003e\n\u003ctd\u003eRS-485, galvanically isolated from CPU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface Connector\u003c\/td\u003e\n\u003ctd\u003e9-pin sub-D female (#4\/40 UNC thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBus Termination\u003c\/td\u003e\n\u003ctd\u003eProvided via EN50170 cable connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDevice Address Range\u003c\/td\u003e\n\u003ctd\u003e0 to 125 (configured via software)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Slaves\u003c\/td\u003e\n\u003ctd\u003e125 max (address range 0 to 125)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Capacity\u003c\/td\u003e\n\u003ctd\u003eUp to 16 Units max per NJ-series Controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Velocity \u0026amp; Firmware Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eOmron CJ1W-PRM21\u003c\/strong\u003e interfaces directly across the high-speed CPU bus, executing deterministic master cycle exchanges with up to 125 slave devices without introducing scan latency to the primary CPU. Internal memory allocation transfers cyclic I\/O blocks dynamically between the PROFIBUS fieldbus layer and the controller memory tables during the hardware refresh phase.\u003c\/p\u003e\n\u003cp\u003eFirmware version 3.0 supports both PROFIBUS DP-V1 Class 1 cyclic parameter mapping and Class 2 acyclic messaging. Galvanic isolation between the internal CPU backplane electronics and the field-side RS-485 transceiver stage isolates high-voltage electrical transients, maintaining backplane stability and preventing backplane bus noise interference across dense I\/O racks.\u003c\/p\u003e\n\u003ch3\u003ePackage Contents \u0026amp; Ordering Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1x Omron CJ1W-PRM21 Remote I\/O Communication Unit\u003c\/li\u003e\n\u003cli\u003e1x Hardware Installation Sheet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRack Mounting:\u003c\/strong\u003e Slide the CJ1W-PRM21 unit into the designated CPU Rack or Expansion Rack slot until the upper and lower locking tabs click into position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAddress Configuration:\u003c\/strong\u003e Set the CPU Bus Unit rotary switch (0 to F Hex) on the front panel to establish the internal backplane device address prior to powering the rack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Termination:\u003c\/strong\u003e Wire the RS-485 network via a standard 9-pin sub-D PROFIBUS connector (#4\/40 UNC threads) equipped with an integrated EN50170 bus terminating resistor network.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShielding and Grounding:\u003c\/strong\u003e Terminate the PROFIBUS cable braid shield through 360-deg grounding clamps at the connector shell to establish low-impedance grounding directly to the functional earth (FE) rail.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the maximum current consumption of the CJ1W-PRM21 module?\u003c\/p\u003e\n\u003cp\u003eThe unit draws a maximum of 400 mA at 5 VDC directly from the internal CPU rack backplane power supply.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow many PROFIBUS slave devices can a single CJ1W-PRM21 master control?\u003c\/p\u003e\n\u003cp\u003eA single CJ1W-PRM21 master unit supports up to 125 slave devices across an address range of 0 to 125.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat physical port interface is provided for fieldbus connection?\u003c\/p\u003e\n\u003cp\u003eThe module provides a galvanically isolated RS-485 interface via a standard 9-pin sub-D female connector with #4\/40 UNC threads.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan the CJ1W-PRM21 be installed on an NJ-series Controller Rack?\u003c\/p\u003e\n\u003cp\u003eYes, up to 16 CJ1W-PRM21 units can be configured per NJ-series Controller Unit across CPU and Expansion Racks.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs the PROFIBUS field network galvanically isolated from the controller backplane?\u003c\/p\u003e\n\u003cp\u003eYes, the RS-485 PROFIBUS transceiver circuit is galvanically isolated from the CPU backplane logic.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow is bus termination handled on the CJ1W-PRM21 PROFIBUS line?\u003c\/p\u003e\n\u003cp\u003eBus termination according to EN50170 standards must be provided via an external terminating resistor switch built into the 9-pin sub-D cable connector.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs hot-swapping permitted for the CJ1W-PRM21 unit during live operation?\u003c\/p\u003e\n\u003cp\u003eNo, power to the CPU Rack and Expansion Racks must be completely isolated before inserting or removing the unit.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat PROFIBUS protocol standards are supported by unit version 3.0?\u003c\/p\u003e\n\u003cp\u003eUnit version 3.0 supports EN50170 Volume 2 standards, covering PROFIBUS DP and DP-V1 Class 1 and Class 2 Master modes.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Omron","offers":[{"title":"Default Title","offer_id":47306643177645,"sku":"CJ1W-PRM21","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/CJ1W-PRM21_1.jpg?v=1788156895","url":"https:\/\/www.maxwellplc.com\/ru\/products\/omron-cj1w-prm21-remote-i-o-communication-unit-cj-series","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}