MTS FlexTest Models 200 - Manual (Page 249)

Model 493.74 Two-Station HSM Interface Board
MTS FlexTest® Models 40/60/100/200 Controller Hardware Digital I/O and Transition Boards 249
J28 HSM Connection for the Model 493.74 HSM Board
Connector J28 HSM controls a hydraulic service manifold (HSM). HSM
control (off/low/high or proportional) is software configurable.
Off/low/high control provides separate 24-volt, low-pressure and high-
pressure outputs that drive the HSM low- and high-pressure solenoids.
Proportional control provides a current output from 0 to 0.78 A.
Note The Model 493.74 HSM board cannot be used directly with 115 V
AC HSMs. Applications that use 115 V AC HSMs require an external
converter box (such as a Model 413.08), which is used with this
board.
Cable specification
To maintain EMC compliance, J28 HSM cables must comply with the
following specifications:
Connector–4-contact, CPC male connector (AMP Incorporated).
Cable for on/off HSMs–18 AWG, 2-conductor with foil shield with drain
wire connected to pin 3 at the chassis.
Cable for high/low HSMs–18 AWG/4 conductor with overall foil shield
with drain wire connected to pin 3 at the chassis.
J28
(D9S)
493.74 HSM Board
J28A
J28B
Intlk
J28B HSM
R
J43-1 J43-2
Run/Stop J44-1 J44-2
Aux Power J49-1 J49-2
Load Frame J29-1 J29-2
J28A HSM
1
2
3
4
Low Pressure
DC Common
Shield
High Pressure
To HSM
Low
Hi
+24 V
- Proportional
+ Proportional
Solenoid
Solenoid or
Proportional
Valve
493.74
HSM
Station