α
2 Simple Application Controllers
Wiring 4
ENG-19
ENG
4.3 Power Supply
• When wiring AC supplies the “Live” cable should be connected to the “L” terminal and
the “Neutral” cable should be connected to the “N” terminal. Do NOT connect the “Live”
wire to the “N” terminal, the user might receive a dangerous shock on powerup.
• When wiring DC supplies the “positive” cable should be connected to the “+” terminal
and the negative cable should be connected to the “-” terminal. On no account should
the power supply terminals be connected to any other terminal on the unit. DC Power
Supply units should be capable of providing 4 Amperes of current to the controller.
Figure 4.2: Recommended Power Input Wiring Diagram
Table 4.2: Recommended Power Wiring
Ref. Item Description
1
Power supply
AL2-***-A: 100-240V AC, 50/60Hz
AL2-***-D: 24V DC
2 Circuit isolation device
3 Power ON pilot indicator
4 Circuit protection device - Limit to 1.0A
5
α
2mainunit
6 Emergency stop
7 Magnetic switch contact
8 Power supply for loads
L
N
"L" and "N" terminals are
not reversible.
L
N
Start
MC
MC
+
+ -
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