Basler Electric DECS-100 - Manual (Page 41)

9287500991 Rev M DECS-100 Installation 4-7
Relay Output (Alarm)
The common alarm relay output contact may be accessed at the terminals labeled AL1 AND AL2.
Communication Port
The RS-232 port on the rear panel uses a DB-9
female connector. Figure 4-4 Illustrates the pin
assignments of the communication port and
Table 4-4 Identifies the RS-232 connector pin
functions. A standard communication cable
terminated with a DB-9 male connector is used
for PC interface with the DECS-100 as shown in
Figure 4-5.
Figure 4-4. RS-232 Port Pin Assignments
Table 4-4. Communication Port Pin Functions
Pin Function Name Direction
1 N/C — N/A
2 Transmit data TXD From DECS-100
3 Receive data RXD To DECS-100
4 N/C — N/A
5 Signal ground GND N/A
6 N/C — N/A
7 N/C — N/A
8 N/C — N/A
9 N/C — N/A
Figure 4-5. Personal Computer to DECS-100 Connections
DECS-100 Connections for Typical Applications
Figures 4-6 through 4-10 illustrate typical applications using the DECS-100. Figure 4-6 shows an
application where DECS-100 operating power is derived from a permanent magnet generator (PMG) and
three-phase voltage sensing is applied to the DECS-100. Figure 4-7 shows another PMG application but
with single-phase voltage sensing. Figure 4-8 shows an application where DECS-100 operating power is
derived from the generator output (shunt application) and three-phase voltage sensing is applied to the
DECS-100. Figure 4-9 shows another shunt application but with single-phase sensing. Figure 4-10 shows
a DECS-100 powered by single-phase station power in a three-phase sensing application.
Figure 4-11 shows a typical connection diagram for two paralleled generators operating in cross-current
compensation (reactive differential) mode. The resistors shown have a value of 0.1 ohms. This is a typical