in
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Smart2 Instruction Manual
June 2016
Page 17 of 49
The input power then needs to be connected to J27. Pin 3 is line, pin 2 is neutral, and pin 1 is earth
ground.
4.3 COMMONS
Each receiver relay output (normally open or normally closed) is independent (floating), both input and
output. Relay commons (hot) are not wired together on the receiver board, nor are they connected to the
input power. Relay common wiring must be provided by the user; this is to give total flexibility in wiring.
Different motors and/or functions can use different phases or independent power sources (including DC
voltage). Refer to Section 4.6.1 for recommendations on methods to add additional isolation.
4.4 POWER OR HOT ROUTING
The diagrams in Section 4.6 show independent power “HOT” routed to each relay. An alternate way of
routing power is to route all power to each function from the Machine Stop (MC) (K15 and K16) relays.
This wiring can only be used if the total current does not exceed the Machine Stop relay ratings.
4.5 MACHINE STOP (MC) RELAYS
The in
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Smart2 contains two relays that can be used as redundant machine stop (mainline) relays.
These relays (K15 and K16) have both normally open and normally closed contacts. This is to give
maximum flexibility when wiring these relays. While it is not necessary to use the redundancy provided
by these relay outputs, Magnetek highly recommends that both of these be utilized.
4.6 WIRING
DIAGRAMS
The CPU board of the in
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Smart2 contains sixteen relays. Two of these relays (K15 and K16) are used
for machine stop (MC) as described in Section 4.5, and two other relays (K13 and K14) are Form C “flip-
flop” relays. All of the other relays (K1-K12) are normally open relays where K1-K11 are single output
relays and K12 is a dual output relay. Figure 3 shows the relay wiring for all of the relays on the CPU
board.
1
J27
G N L
