LINK Systems Max Presence Sensing Device - Manual (Page 17)

Link Lite Black Max Section 3 - Installation
3-12
Unplug the terminal/connector from its
socket and turn the three wire clamp
screws counterclockwise so that the power
wires can be inserted into the wire clamp-
ing slots. Strip the three power wires about
1/4" from their ends, insert them into the
wire clamping slots, and tighten the
clamping screws in the following order.
"Hot" wire connects to
terminal marked L1
Neutral wire connects to terminal
marked L2
Ground wire connects to terminal
marked GND
When finished connecting the wires, plug
the terminal/connector back into its socket.
Three power wires must also be pulled
through the conduit from the machine
control to the main Black Max unit. The
location of the three connection power
terminal/connector is shown in Figure 3.14
for the receiver unit. Connect the power
wires to the receiver to the power termi-
nal/connector by following the same
procedures outlined for transmitter power
connections.
3.5.3 Control Connections
Link Lite Black Max(s) must be wired into
the machine control circuit in such a
manner that their stop signal to the control
results in the control immediately initiating
machine stopping action.
All control wiring connections to the Link
Lite Black Max are made to the eight
position terminal/connector located on the
relay board in the main Black Max receiver
enclosure, accessible by opening the door
to the receiver enclosure as shown in
Figure 3.14. Run wires through the 1/2"
flexible conduit from the machine control
enclosure to the main Black Max receiver
unit to interconnect the light curtain to the
control.
Two normally open (N.O.) and one nor-
mally closed (N.C.) contact paths are
supplied in the Link Lite Black Max
receiver unit for interconnection to
machine control circuits. Two separate
relay contacts whose operation is checked
by Black Max logic circuits are used in
each path as shown in Figure 3.14. The
interconnection of the Black Max(s) to the
control circuit depends on the design and
configuration of the machine control
circuit. When the Black Max is used with
a machine control supplied by Link
Systems, schematics will be provided that
show the connections that must be made
between the Black Max light curtain and
the control. Wire as shown in the sche-
matic. Do not deviate from the schematic
unless Link gives written approval of an
alternative wiring scheme.
When interconnecting Black Max units to
controls not supplied by Link, at least one
of the normally open contact paths must be
used to provide the stop signal to the
machine control in such a manner that the
control immediately initiates machine
stopping action. In some cases use of both
normally open contact paths of the Black
Max may be necessary. The normally
closed contact path between terminals 3
and 4 must never be used to provide the
stop signal to the press control. Link
provides these terminals for use in addition
to normally open contact
WARNING! Improper connection of
Link Lite Black Max(s) to the machine
control can cause the Black Max to be
ineffective as a safety device with
possible consequent injury to personnel
by the machine hazard intended to be
safeguarded.