LINETRAXX® RCMS490-D Blindspot®

LINETRAXX® RCMS490-D Blindspot®

  • Multi-channel ground-fault monitoring relay for grounded and high-resistance-grounded AC/DC systems
  • Monitor up to twelve separate channels with individually adjustable alarm trip values
  • Digital display with real-time readings and on-board menu
  • Harmonics analysis and selectable filtering options
  • Individual contact outputs and compatibility with Ethernet and Modbus communication gateways

The RCMS490 series provides ground-fault monitoring for up to twelve separate systems or channels in grounded and high-resistance grounded, AC/DC, single-phase or three-phase systems. The RCMS490 is also compatible with systems that contain power conversion equipment, such as variable frequency drives.

Each channel has an independently adjustable trip value. For AC systems, the trip value is adjustable from 6 mA to 20 A. For DC and mixed AC/DC systems, the trip value is adjustable from 10 mA to 10 A. Each channel is individually monitored with a connected current transformer, available in a wide range of sizes, shapes, and core types.

Three separate time delays are available - a pickup delay, startup delay, and delay on reset. Advanced harmonics analysis and filtering options allow for tailoring use to specific application requirements.

The on-board LCD display shows a detailed system overview, including a chart showing measured ground-fault current in real-time, individual alarm messages for each channel, and an easy-to-use menu for adjusting settings. Advanced harmonics analysis and filtering options allow for tailoring the relay's monitoring capabilities to specific application requirements.

Two configurable Form-C (SPDT) outputs trigger on alarm activation. Additionally, each channel has an individual Form-A (SPST) output. The RCMS490 is compatible with Bender's communication gateways for connecting to Ethernet and Modbus networks.

  • Features
  • Applications
  • Accessories
  • Ordering information
  • Downloads
  • Multi-channel ground-fault protection for solidly and high-resistance grounded AC and DC systems, single-phase and three-phase
  • Meets or exceeds code requirements for ground-fault detection on grounded AC and DC systems where applicable
  • Individually monitor up to twelve systems / circuits from one relay
  • Detailed digital display showing measured values in real-time
  • Individually adjustable trip values, as low as 6 mA and as high as 20 A
  • Connects to current transformers available in a wide range of sizes, shapes, and core types
  • On-board test and reset button with connections for external activation
  • Adjustable time delays (pickup, startup, on reset)
  • Latching or non-latching operation
  • Two Form-C (SPDT) alarm outputs, operating normally energized (failsafe) or de-energized (non-failsafe)
  • Twelve Form-A (SPST) alarm outputs, individually configurable for each monitoring channel
  • Compatible with Bender's communication gateways for connection to Ethernet or Modbus networks
  • Ground fault monitoring on grounded and high-resistance grounded AC/DC systems
  • Systems with variable frequency drives, inverters, and other power conversion equipment
  • General purpose DC systems, per NEC 250.167(B)
  • General power distribution
  • Motors and motor control centers
  • Control systems
  • Heat trace systems, per NEC 427.22 and CEC 62-116
  • Solar arrays, per NEC 690.41(B) (2017 edition), NEC 690.5 (2014 edition), and CEC 64-064(4)
  • Energy storage systems


Optional accessories for LINETRAXX® RCMS490-D Blindspot®

AC current transformers
Part No.OpeningShape and TypeOrdering No.
W1-S351.35" (35mm)circular, solidB911731
W2-S702.75" (70mm)circular, solidB911732
W3-S1054.1" (105mm)circular, solidB911733
W4-S1405.5" (140mm)circular, solidB911734
W5-S2108.25" (210mm)circular,solidB911735
WR70x175S2.75"x6.9" (70x175mm)rectangular, solidB911738
WR115x305S4.5"x12" (115x305mm)rectangular, solidB911739
WR150x350S5.9"x13.8" (150x350mm)rectangular, solidB911740
WR200x500S7.9"x19.7" (200x500mm)rectangular, solidB911763
WS20x300.75"x1.2" (20x30mm)rectangular, split-coreB98080601
WS50x802"x3.1" (50x80mm)rectangular, split-coreB98080603
WS80x1203.1"x4.7" (80x120mm)rectangular, split-coreB98080606

AC/DC current transformers
Part No.OpeningShapeOrdering No.
W20AB0.78" (20mm)circularB98080008
W35AB1.35" (35mm)circularB98080016
W60AB2.36" (60mm)circularB98080026
W120AB4.7" (120mm)circularB98080041
W210AB8.25" (210mm)circularB98080040

Power supply for use with RCMS and WAB series current transformers
Part No.DescriptionOrdering No.
AN420-2Power supply for up to six WAB series current transformersB94053100

Connection cable for use with RCMS and WAB series current transformers
Part No.LengthOrdering No.
WXS-1003' (1m)B511100028
WXS-2508' (2.5m)B511100029
WXS-50016' (5m)B511100030
WXS-100032' (10m)B511100027
WXS-150050' (15m)B511100035

Communication gateways
Part No.DescriptionOrdering No.
COM465IPEthernet and Modbus gatewayB95061065
CP700Ethernet and Modbus gateway and HMIB95061030

Variants of LINETRAXX® RCMS490-D Blindspot®

Part No.Supply VoltageOutput ContactsOrdering No.
RCMS490-D-1 Blindspot®16-72 VAC (42-460 Hz), 16-94 VDC2 Form-C, 12 Form-AB94053005
RCMS490-D-2 Blindspot®70-276 VAC (42-460 Hz), 70-276 VDC2 Form-C, 12 Form-AB94053006

Downloads for LINETRAXX® RCMS490-D Blindspot®



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