LINK Systems Omni II Automatic Setups Module - Manual (Page 19)

October 16, 2008 Manual Version 1.1
3-5
The 4 pin plug supplied for connection of the high speed serial bus is a dual connector plug.
This dual connector plug allows for the high speed serial bus cable to be strung from module to
module if an addition OmniLink II Press Automation module is to be connected from this unit.
Section 3.1.4.3 Setting High Speed Serial Bus Termination Switch
The high speed serial bus termination switch must be placed in the correct position. The high
speed serial bus termination switch is labeled “Term. Switch”. If this device is the last device in
the serial bus string, the termination switch must be placed in the closed (up) position. The red
LED indicator next to the switch will light when the switch is in the closed position. The last
device in the serial bus string will have only one high speed serial bus connection to the 4 pin
dual plug. The last device will have a connection from the previous device, but will not connect
to any other devices. If this device is not the last device in the serial bus string, the termination
switch must be placed in the open (down) position. The red LED will be off when the switch is
in the open position.
Section 3.2 Valve Systems
Counterbalance and cushion systems are very similar in the way they are controlled. Three basic
integrated valve configurations are available from Link to be used with the OmniLink II Press
Automation Control Automatic Setup module. For clarity in the following sections, these valve
configurations are defined here.
Type “A”
An integrated Fill/Dump Valve as shown in Figure 3.5. This valve has the
advantage of simple straight through piping with all pilot pressures run internally
and is easily mounted. It may be used for air cushion and air counterbalance
control. This is the least expensive of the three valves. Leaks in cushion and
counterbalance systems will cause loss of pressure in these systems when either
control power is off or supply pressure is absent. However, the control must be
turned back on and pressure re-established before the press will stroke.
Figure 3-5 Type "A" Valve Configuration
Type “B” An integrated Fill/Dump valve with a manual regulator, check valve, and LOX
valve in parallel as shown in Figure 3.6 for cushion, but not counterbalance,
adjustment. This valve adds a parallel manual regulator system to the Type “A”
valve, which may be set to prevent the air pressure in the cushion from going