MTS 793 Controller Hardware
209
Control voltages for hydraulic power units vary between models.
The HPU interface between the Model 493.42 System I/O 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 connector
J25 on the Model 493.42 System I/O board.
Cable specification The J25 HPU and J51 Box In connectors are 15 pin type D male
connectors.
• 15 contact type D female EMI connector.
• Cable—24 AWG, 10 conductor with braided shield with drain wire
connected to metallized plastic backshell to 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 PN 039-713-
301 or jumper pins: 1–7, 2–3–5, 6–9, 8–10–11–12, 6-9.
For an electrical diagram of J25, see page 119.
J28 Hydraulic Service Manifold Connector
See J28 Hydraulic Service Manifold Connector 120
J29 Emergency Stop Connections
Connector J29 E-STOP provides an output to external devices when
an emergency stop signal is generated. This connector may also be
used with an external E-stop.
CAUTION
J29 Connector Pin Assignments (part 1 of 2)
P
IN NAME FUNCTION
1 xhead 24V Fused +24V
2 xhead intlk com 24V common
3 Program interlock low (xhead
interlock low)
Low side of opto-isolator, jumpered to common
4 Program interlock high
(xhead interlock high)
High side of opto-coupler, pulled up to 24V (opto on = intlk)
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