ALPHA Distribution Boards and Terminal Blocks

ALPHA FIX Terminal Blocks
Terminals with Spring-Loaded Connection
8WA initiator/actuator terminals
© Siemens AG 2010
11
■ Overview
• Fast and cost-effective connection from signal transmitters to
the PLC
• Only 5 mm wide but still fitted with connection option for proximity
switches with up to three conductors plus shielding
• Connection is clear, simple and safe due to:
- Front connection
- Color coding of clamping points
- Conductors from only 0.08 to 1.5 mm² without end sleeves
that are secured using spring-loaded terminals
• LEDs make the switch states or the application of voltage visible,
it is no longer necessary to test with measuring
instruments
• Connection modules cut wiring requirements and time because
the potentials of the terminals (L+, L– and S) are automatically
connected; there is therefore no need for linking
accessories
• The modules contain a feeder terminal and 8 or 17 initiator/
actuator terminals and can be snapped or screwed onto
35 mm standard mounting rails
The feeder terminals are fitted with an additional negative outgoing
feeder which can be used to supply isolated digital input/output
modules. The frame (M) can therefore be bridged by means
of the terminals.
Terminals and connection modules (always order as combined unit)
0
1
2
3
4
5
6
7
M(Minus)
1 1
0
1
2
3
4
5
6
7
M(Minus)
8 8
NSH0_00007c
1
2
3
4
Digital input/output
modules, electrically
isolated
Feeder terminal
Initiator/actor terminals
Module link rails
L
L
L
S
E 0 1 2 3 4 5 6 7 E 0 1 2 3 4 5 6 7
L
4
2
3
3
Initiator/actuator terminals with electrically isolated digital input/output
modules
11/70 Siemens ET A1 · 10/2009