Basler Electric DECS-250N - Manual (Page 137)

9440500990 Rev D 121
DECS-250N Typical Connections
Typical Connections
Typical connection diagrams are provided in this chapter as a guide when wiring the DECS-250N for
communication, contact inputs, contact outputs, sensing, and operating power.
Typical connections for shunt powered applications are shown in Figure 109. Typical connections for
PMG powered applications are shown in Figure 110. Typical connections for station powered applications
are shown in Figure 111. Three-phase-delta voltage sensing connections are shown. The drawing notes
in Figures 109, 110, 111 and correspond to the descriptions found in Table 8.
Note
Field wires, connected to terminals F+ and F–, must be twisted pair
with approximately one turn per inch for an EMC compliant installation.
Table 8. Typical Connection Drawing Descriptions
Locator Description
1
Operating (bridge) power input. For single-phase power, omit one phase connection.
See Power Inputs or Specifications for operating power ratings.
2
Generator voltage sensing input. Potential transformer required if line voltage exceeds
600 Vac.
3 Cross-current compensation input, 1 Aac or 5 Aac.
4
Connections required only if voltage matching, sync-check, or auto synchronizer
functions are used.
5
Labels indicate the functions assigned by the default programmable logic to the
contact inputs and outputs.
6 See the Power Inputs or Specifications chapter for control power input ratings.
7
RS-232 port used for communication with another DECS in a redundant DECS
system.
8 Optional communication port (style xxxxxxP) uses Profibus protocol.
9 IRIG time synchronization input.
10
Ethernet communication port can be copper (style xxxxx1x) or fiber optic (style
xxxxx2x) and uses Modbus communication protocol.
11
Type B USB jack for temporary, local communication.
Caution
In accordance with the guidelines defined in USB standards, the USB
port on this device is not isolated. To prevent damage to a connected
PC or laptop, the DECS-250N must be properly tied to ground.
12
This input/output is unassigned by default if the DECS-250N is not equipped with the
optional PSS (style number xPxxxxx).
13
RS-485 port uses the Modbus RTU protocol for communication with other networked
devices.
14 Optional - ICRM (Inrush Current Reduction Module), Basler part number 9387900104.