MTS 793 Controller Hardware
FlexTest GT Controller Connections
121
Cable specification
•
P28 is a 4-contact CPC male connector (AMP Incorporated).
•
Cable for on/off HSMs–18 AWG/2 conductor with overall foil
shield (Carol C2534 or equivalent) with drain wire connected to
pin 3 at the chassis.
•
Cable for high/low HSMs–18 AWG/4 conductor with overall foil
shield (Carol C2543 or equivalent) with drain wire connected to
pin 3 at the chassis.
Proportional output
The proportional output is configured 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 500 psi
and high pressure is set at 3000 psi.
•
The ramp rate from zero to high pressure can be set to two or four
seconds. The ramp rate from high pressure to zero can be set to
zero, two or four seconds.
•
The ramp rate is constant (set to the two or four second rate), The
amount of time to reach low pressure depends on the low
pressure setting.
hwi file settings
The following items can be specified in the hwi file. For more
information, see the
MTS 793 Utility Software
manual.
•
HSM ramp rate from zero to high pressure (
HSM RATE
):
SLOW
= zero to high pressure in approximately 4 seconds
FAST
= zero to high pressure in approximately 2 seconds
•
HSM high pressure to zero mode (
HSM OFF MODE
):
STEP
= HSM steps from high pressure to zero (default)
RAMP
= HSM ramps from high pressure to zero
1
2
3
4
Low Pressure
DC Common
Shield
High Pressure
To HSM
J28
From Chassis
lo
hi
+24 V
- Proportional
+ Proportional
Solenoid
Solenoid or
Proportional
Valve
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