The Model 494.42 board is used with FlexTest 40 controllers.
Item Description 494.42 System Board circuit board icon
The System Board defines digital and analog inputs and outputs, and hydraulic power unit (HPU) and hydraulic service manifold (HSM) functionality.
Properties tab
Slot:4.
Slot 4 in the FT-40 chassis is reserved for the system board.
System Rate:1024, 2048, 4096 and 6144 Hz (binary).
The System Rate must be an integer multiple of the Medium System Rate.
Medium System Rate:Must be an integer multiple of the Low System Rate.
The Low System Rate is always set at 25.6. The Medium System Rate is typically 256.
Low System Rate:25.6.
Digital Name:Describes this resource as it will appear in Station Builder resource lists when opened against an .hwi file. The name includes the connector number (for example:
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Input/Digital Output icons
“Dig In 1-J54”).
Changing this name may invalidate existing station configurations.
Analog Output icons
Name:Describes this resource as it will appear in Station Builder resource lists when opened against an .hwi file.
Connector:Both Analog Outputs are available on the “DA Output” connector (located on the front of the 494.04 chassis).
Changing this name may invalidate existing station configurations.
An Acumen system requires an Analog Output that provides a motor command signal for the Elmo motor drive. To designate an analog output for the motor command signal (Elmo Drive), right-click on the Analog Output icon and click Elmo Output. An Elmo Output icon appears. Click on this icon to display a list of settings required for the Acumen system.
Hydraulic Interface icon (HPU)
Name: Describes this resource as it will appear in Station Builder resource lists when opened against an .hwi file.
Changing this name may invalidate existing station configurations.
Connector: J25.
HPU with HSM: True: Indicates the system’s HPU supplies HSMs. False: used for HPU only systems (makes the HPU selection available to Station Builder).
Type:
Off-high–only two HPU control buttons (Off/High) will appear on the Station Manager Station Controls panel.
Off-low-high–three HPU control buttons (Off/Low/High) will appear on the Station Manager Station Controls panel.
First On:
True: Indicates that the first HSM turned on activates the HPU.
False: Setting First On and Last Off to False allows the HPU to turn on independent of HSM power.
Setting First On and Last Off to True allows HSM Low selection to activate HPU High without pressing the HPU buttons.
Last Off: True: Causes the last HSM turned off to turn off the HPU.
The First On/Last OFF settings are only available if the HPU with HSM setting is True.
HWI Hardware Settings
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Item Description
True: the HPU button is visible on the Station Manager control panel.
False: Removes the HPU button display from the Station Manager control panel, provided both First On and Last Off are True.
The Visible setting is only available when both the First On and First Off settings are set to True.
Hydraulic Interface icon (HSM)
Name: Describes the hardware resource as it will appear in Station Builder resource lists.
Changing this name may invalidate existing station configurations.
Connector: J28
Type: Solenoid, Proportional, On/Off Solenoid.
Solenoid: three HSM control buttons (Off/Low/High) will appear on the Station Manager Station Controls panel.
On/Off Solenoid: only two HSM control buttons (Off/On) will appear on the Station Manager Station Controls panel. For the other types, three HSM control buttons will appear (Off/Low/High).
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Proportional: you configure the proportional output with the controller software. The output signal can be ramped from 20 mA (minimum) to 700 mA (maximum) which corresponds with 50 psi (0.4 MPa) and 3000 psi (21 MPa). By default, low pressure is factory set at 750 psi (5.25 MPa) and high pressure is set at 3000 psi (21 MPa).
Connect to HPU:
Off–indicate the HSM can be activated without an HPU activation.
HPU On–indicates that the HPU must be started (either manually or as “first on”) before you can activate an HSM.
HPU On w/ Tracking–Same function as HPU On, however HSM cannot be at a higher state than the HPU. For example, if HPU and HSM are set to high, and then HPU is set to low, the HSM will follow the HPU state and change to low. If HPU is set to off, HSM will follow and set to off.
Low Percent: 25. HSM low pressure setting as a percentage of full-scale.
High Percent: 100. HSM high pressure setting as a percentage of full-scale.
HSM Rate: Slow = 4 seconds. Fast = 2 seconds.
Time to achieve low pressure from zero pressure = (Low Percent value) x (HSM Rate value).
Time to achieve high pressure from low pressure = (High Percent value x HSM Rate value) - (Time to achieve low pressure).
Example: If Low Percent value = 25, High Percent value = 100, and HSM Rate = Slow (4 seconds):
Time to achieve low pressure = 0.25 x 4 = 1 second.
Time to achieve high pressure = (1 x 4) - (1) = 3 seconds.
Interlock Interface icon
Connector: J43,J29.
Assign to Interlock: Set to 1.
Gate Interlock: True or False, True = the controller responds to the gate interlock signal on pins 3 and 4 of J29. (Default=True.) False=J29 pins 3 and 4 are reserved for Program Stop interlock.
Caution:
Failure to enable the gate interlock option on systems that can operate in Slow (low-flow) mode can result in unexpected actuator movement when switching the system from Slow mode to Fast mode.
HWI Hardware Settings
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Item Description
the equipment.
Enable the gate interlock option for systems that include a Slow (low-flow) mode for specimen installation.