MTS 793 Controller Hardware
FlexTest GT Controller Connections
99
257 valve connections
The Series 257 Servovalve is a 3-stage servovalve that requires a power
driver. The Model 493.15 Valve Driver supports the inner loop signals.
The following figure shows the connections between the valve driver
and the valve. See
“Cable Part Numbers”
on page 76 to connect the
valve to the I/O Carrier module.
Inner Loop
Outer Loop
Command
Valve
Driver
Test
Command
Controller
Control
Mode
Valve LVDT
Feedback
Actuator LVDT
Feedback
1
2
3
4
5
6
7
8
9
10
11
12
13
14
J4 - J7
To/From
Servovalve
To/From
I/O Carrier
+ Excitation
- Excitation
+ Feedback
- Feedback
Signal Ground
+ Valve Command
- Valve Command
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