LINK Systems OmniLink II Press Automation Control - Manual (Page 23)

August 30, 2002 Manual Version 1.0 2.14
Section 2.3.4 Wiring the Valve Voltage Circuit
The OmniLink II Press Automation Control brake monitor and motion detector functions require a
signal from the press clutch/brake control that indicates when the press strokes and stops stroking. This
signal is derived from the voltage across the dual air valve solenoid (in some cases a hydraulic valve
may be used) that controls stroking. Two red wires must be pulled through the 115VAC conduit
between press control and the OmniLink II Operator Terminal enclosure. On the press control end the
wires must be connected to opposite sides of one solenoid of the dual air valve. On the Operator
Terminal end, the wires must be connected to terminals 1 and 2 of the plug for Connector 4. This is
shown in Figure 2.13. Some presses have a single dual air valve that operates both clutch and brake.
Others have two dual air valves, one for the clutch and one for the brake. When two dual air valves are
used, always wire to a solenoid for the valve that controls the clutch.
Section 2.3.5 Wiring the OmniLink Stop Circuit Output
Two cross checked, force guided contacts operated by two separate microprocessors on the 802-5 R/D-
Brake Monitor Module are used to provide both immediate stop and top stop signals to the press
clutch/brake control to stop press stroking when faults are detected by the OmniLink II Press and
Automation Control. These contacts, located between terminals 3 and 4 of Connector 4 are normally
open, energized closed. They open to give a stop command to the press control. They should be wired
into an immediate stop circuit of the press control as indicated in Figure 2.13. An immediate stop circuit
is one that can immediately stop stroking of the press and will require use of the operator controls to
resume stroking after the stop is removed. On many press controls, placing the contacts in series with
the red color stop buttons (often referred to as “Emergency Stop Buttons”) is the desirable wiring
method. This circuit used must not drop out motor controls on the press. Link engineers will assist you
in determining where to wire the contacts into the press control if you need help.
If the immediate stop circuit in the press clutch/brake control is a 115VAC circuit (such as in most
relay controls), pull two red wires in the 115VAC conduit between the OmniLink II Operator Terminal
enclosure and the press control. Wire to terminals 3 and 4 of Connector 4 on the 802-5 R/D-Brake
Monitor Module located in the back of the operator terminal enclosure and into the 115VAC stop circuit
in the press control.
If the immediate stop circuit in the press clutch/brake control is a low dc voltage circuit (such as in
most solid state controls), pull two blue wires in the low voltage conduit between the OmniLink II
Operator Terminal enclosure and the press control. Wire to terminals 3 and 4 of Connector 4 on the
802-5 R/D-Brake Monitor Module located in the back of the operator terminal enclosure and into the
low voltage stop circuit in the press control.
Figure 2.14 illustrates the appropriate stop circuit connections for Link’s SS501 press controls. Since
these are solid state controls with low voltage dc circuits, 2 blue wires should be pulled through the low
voltage conduit between the OmniLink II Operator Terminal enclosure and the press control for this
connection.