9492600990 16-1
DECS-150 Terminals and Connectors
16 • Terminals and Connectors
DECS-150 terminals and connectors are located on the rear panel as illustrated in Figure 16-1. DECS-
150 terminals consist of single-row, multiple-pin headers that mate with removable connectors wired by
the user. The USB port is located on the front or rear panel as specified by the DECS-150 style number.
The USB port and Ethernet port are described in the Communications section.
DECS-150 connections are made with connectors with spring compression terminals. These connectors
plug into headers on the DECS-150. The connectors and headers have a dovetailed edge that ensures
proper connector orientation. The 15-position connectors and headers are uniquely keyed to ensure that
a connector mates only with the correct header. Connector terminals accept a maximum wire size of 12
AWG. Connectors and headers may contain tin- or gold-plated conductors.
By mating conductors of dissimilar metals, galvanic corrosion could
occur which may lead to signal loss.
Terminal Descriptions
DECS-150 terminals are described in the following paragraphs.
Power Supply Inputs (3, 4, 5, GND)
These terminals accept single-phase or three-phase operating power for the excitation power stage of the
DECS-150. A ground for the operating power connections is provided at terminal GND.
For more information, refer to the Power Input and Output section.
Generator/Motor Voltage Sensing Inputs (E1, E2, E3)
Three-phase generator/motor sensing voltage, obtained from user-supplied voltage transformers (VTs) if
required, connect to these terminals.
For more information, refer to the Voltage and Current section.
Bus Voltage Sensing Inputs (B1, B2, B3)
Three-phase bus sensing voltage, obtained from user-supplied potential transformers (PTs) if required,
connects to these terminals.
For more information, refer to the Voltage and Current section.
Generator/Motor Current Sensing Inputs (IA+, IA–, IB+, IB–, IC+, IC–)
These terminals connect to user-supplied current transformers (CTs) providing three phases of
generator/motor sensing current.
For more information, refer to the Voltage and Current section.
Cross-Current Compensation Input (CC+, CC–)
These terminals connect to user-supplied current transformers (CTs) providing a cross-current
compensation signal.
For more information, refer to the Voltage and Current section.
Power (Field) Output (F+, F–)
Excitation power is supplied to the field through these terminals.
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