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2
Input-output interfaces
2.1
Terminal blocks
The unit is provided with the following input – output interfaces
8 relays output (R1 – R8),
4 binary inputs (DI1 – DI4),
2 digital links according to RS-485 standard (SBUS, ExBUS).
These interfaces are configurable with plenty of various options, but explanation of them would extend the
Manual scope. For easier understanding of the unit operation, these interfaces are described in this Manual
based on default settings (please refer to subsequent sections for more details).
All interface signals are delivered to a common terminal block. Specification of all signals is provided in
Figure 3 and in Table 2.
Some interfaces are galvanic separated from each other. The idea is shown on the structural diagram below.
s. 9|31
User Manual: POD-002-ENG R03
GND
+
GND
+
1
2
3
4
COM NC
NO COM NC
NO COM NC
NO COM NC
NO COM
POWER SUPPLY
DI
R1
R2
R3
R4
Line
polarity
SBUS
ExBUS
Line
polarity
R5
R6
R7
R8
GND
A
B
GND
A
B
COM NO
NC COM NO
NC COM NO
NC COM NO
NC
Figure 3: Electric Connections
Figure 4: Galvanic separation between interfaces of the control unit module – structural diagram
DI Inputs
R1
R2
R3
R4
R5
R6
R7
R8
SBUS, EXBUS
Power
Supply
Sigma MOD LED
3
3
3
3
3
3
3
3
5
4
3
3
1
2
4
5
7
6
3
Summary of Contents for PW-033-A
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