Quick Start Guide

• Typical connection diagram
• Overall and rear panel projection mounting dimensions
• Front panel escutcheon plate dimensions
• Front panel cutting and drilling dimensions, panel mounting
• Front panel controls and indicators
• BESTCOMSPlus® overview

Full Instruction Manual

• Opens 10MB 300+ page PDF-9440300990

Specifications

• Specifications list

Setting the unit

• HMI - All settings except Programmable Logic are accessible via HMI.
• BESTCOMSPlus® - All settings are accessible via this method.

Backward compatibility

• Mechanical - Mounting holes and cutout are the same as the DECS-200.
• Electrical - Electrical specifications are the same or better than the DECS-200.
• Communications - Communications to the DECS-250 uses USB, RS485 (Modbus™ same registers), J1939 Canbus, Ethernet and other protocols. Please refer to instruction manual for specific information.
• Dual DECS tracking communications - This unit is fully backward-compatible for dual DECS tracking schemes.

Electrical connections

• Interconnections
• Specifications

Technical support

Contact Technical Support

Safety concerns

Refer to the Instruction Manual for detailed listing of safety concerns. This device should be installed and operated only by qualified/authorized personnel. The proper grounding of this unit is required for noise immunity and safety. To prevent damage to the unit, observe proper grounding techniques.

LCD blank / No LED indications

Check control power input proper levels and polarity are applied to terminals 7 (Batt +) and 8 (Batt -) or terminals 9 (L) and 10 (N).

No generator voltage

• Check control power input proper levels and polarity are applied to terminals 7 (Batt +) and 8 (Batt -) or terminals 9 (L) and 10 (N).
• Check power input to ensure proper levels are applied.
• Check residual generator voltage (if shunt powered).
  • Flash field as required. Use blocking diodes and current limiting resistors as required.
• Verify all electrical connections.
• Verify start contact signal is applied to the unit.
• Verify proper settings have been programmed into the unit.

Not sharing vars (paralleling applications)

• Verify proper phasing and polarity of sensing voltage.
• Verify proper contact inputs are present and aligned with programmable input logic.
• Verify nominal current settings, including CT ratios.
• Verify proper gain settings.
• Verify proper mode of operation is selected.

Poor voltage regulation

• Verify proper gains, including PID and loop gains.
• Verify proper contact inputs are present and the proper mode of operation has been set.
• Verify there is no input at the auxiliary input terminals.

Voltage instability

• Verify proper gains, including PID and loop gains.
• Verify proper contact inputs are present and the proper mode of operation has been set.
• Verify there is no input at the auxiliary input terminals.

The Americas

Call 1-618-654-2341 or email USATechSupport@basler.com Technical Support available 24 hours a day, 7 days a week

EMEA/Russia/Central Asia/Far East

Call 1-618-654-2341 or email USATechSupport@basler.com Technical Support available 24 hours a day, 7 days a week

China

Call +86 512 8227 2888 or email chinatechsupport@basler.com Technical support is available from 8:30am to 5:00pm (GMT+8) Monday through Friday

Southeast Asia/Oceania

Call +65 68 44 64 45 or email singaporetechsupport@basler.com Technical support is available from 9:00am to 6:00pm (GMT+8) Monday through Friday