9440300990 1-3
DECS-250 Introduction
Optional Features and Capabilities
DECS-250 optional features and capabilities are defined by a combination of letters and numbers that
make up the style number. The model number and style number describe options and characteristics in a
specific device and appear on a label affixed to the device.
Style Number
The style number identification chart in Figure 1 defines the electrical characteristics and operational
features available in the DECS-250.
Figure 1-1. DECS-250 Style Chart
Storage
If a DECS-250 will not be placed in service right away, store it in the original shipping carton in a
moisture- and dust-free environment. The temperature of the storage environment must be within the
range of –40 to 85°C (–40 to 185°F).
Electrolytic Capacitor Considerations
The DECS-250 contains long-life aluminum electrolytic capacitors. For a DECS-250 kept in storage as a
spare, the life of these capacitors can be maximized by energizing the device for 30 minutes once per
year. Refer to the energizing procedures provided in Maintenance.
When energizing the DECS-250 from a low impedance source (such as a wall outlet), use of an Inrush
Current Reduction Module (ICRM) is recommended to prevent damage to the DECS-250. For a detailed
description of the Inrush Current Reduction Module, refer to Basler publication 9387900990. ICRM
connections are illustrated in Typical Connections.
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