MTS FlexTest Models 200 User Manual
Page 242
MTS FlexTest® Models 40/60/100/200 Controller Hardware
Model 493.73 HPU Interface Board
Digital I/O and Transition Boards
242
J25 HPU Connections for the Model 493.73 HPU Interface Board
Connector J25 HPU provides 24-volt logic signals that control the hydraulic
power unit (HPU). The connector can be connected directly to MTS Series
505 HPUs and similar HPUs with low-current (8 mA or less), 24-volt
controls.
Note
Other MTS HPUs require the Model 493.07 HPU Converter Box to
convert the low-current HPU output signal to a high-current signal
that can drive the HPU relay.
Control voltages for hydraulic power units vary between models.
The HPU interface between the Model 493.73 HPU transition board and
an HPU is 24 volt logic signals. Connecting J25 to a non-compliant HPU
can damage the module.
Do not connect 24 V DC relay circuitry or 115 V AC circuitry to the HPU
connector J25.
Cable specification
To maintain EMC compliance, J25 HPU cables must comply with the
following specifications:
Connector–15-contact, type D, female EMI connector.
Backshell–metal.
Cable—32 AWG, 9 conductor with overall braided shield, with the braided
shield connected to the backshell at the chassis.
Jumper plug required
If connector J25 HPU is not used, you must install a jumper plug to
maintain the integrity of the interlocks. Use jumper plug part number 039-
713-301 or jumper pins 1–7, 2–3–5, 6–9, 8–10–11–12.
CAUTION