in
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Smart2 Instruction Manual
June 2016
Page 19 of 49
4.6.1 Wiring
Isolation
Options
The in
tele
Smart2 can be wired to provide different levels of isolation. When the unit is ordered with no
pigtail or connector option, the user can wire the relays to the level of isolation required. This can be
accomplished by referring to the wiring diagrams in Figure 3 for the main board and Figure 5 for the
expansion modules.
When ordering with the pigtail connection (Magnetek P/N: IS2-PT), there is no isolation provided in the
wiring. It is possible to achieve different levels of isolation as required by the application. This can be
accomplished by utilizing any unused wire connections on the board to provide additional control voltage
feeds for the relays. Depending upon the pigtail configuration there may be unused wires. The unused
wires should always be used first to achieve added isolation. After utilizing unused wire connections,
Magnetek then recommends utilizing the input power connections that are unused. If powering the unit
via AC power, then the DC input lines can be used and vice-versa. If additional isolation is still required,
then the connections for the digital inputs (J16), analog input (J25), and CAN (J1) are able to be used as
required.
Magnetek does provide a fully isolated option. Full isolation is only available from Magnetek when
ordering with the HAN style connector (Magnetek P/N: IS2-CON).
4.7 CONNECTING OUTPUTS TO DRIVES
MOVs (transient protectors) are on all of the output relays to protect the relays from power surges. MOVs
allow a small leakage current that can affect some high impedance circuits. When connecting output
relays to drives, it may be required to remove the MOV to prevent its leakage current from holding in the
drive. The MOVs are next to the relays they protect (see Figure 2 for the location of the MOVs). The
MOVs can be cut out of the circuit with a wire cutter if required; ensure that ALL power is OFF to the
crane and all associated controls before removing the MOVs.
4.8 ANALOG
INPUT
The in
tele
Smart2 contains one analog input that can be used to interface with an analog device such as a
load cell. Figure 4 shows the terminals that the analog input needs to be wired to. The analog input can
support a variety of different types of analog input, including 0-5VDC, 0-10VDC, 4-20mA, and 0-20mA.
In addition, there is a reference input for the analog signal. Typically this is the ground reference from the
device that the analog signal is coming from.
Figure 4: Analog Input Wiring