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Quick-Start Guide

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Manual Revision: August 16, 2019 9:03 AM

Product Diagram (PEX8S1050LP)

Component

Function 

1

S5 - S8: DB44 Pin 

Connector to 4-Port 

Breakout Cable

•  Used to connect the 

DB44 to 4-Port DB9 

Breakout Cable

.

2

JP 5 - Power Over 

Serial Connector

•  Used to set pin 9 on the DB9 connector (S1 - 

S4) to RI (no power) or to DC power. The 

JP2 

Aux Power Source Selector

 determines the 

voltage 12 or 5.

•  Default position is RI.

3

S1 - S4: DB44 Pin 

Connector to 4-Port 

Breakout Cable

•  Used to connect the 

DB44 to 4-Port DB9 

Breakout Cable

.

4

PCI Express Connector

•  Used to connect the 

PCI Express Card

 to 

the PCI Express expansion slot on the 

Host 

Computer

.

8-Port PCI Express Low Profile RS232 Serial Card | 16C1050 UART

5

JP1: PME 

•  Used to enable or disable the wake from sleep 

setting.

•  Default position is disable.

6

JP4: Mode

•  Used for factory testing.

•  For normal use the jumper must be set to CEN.

7

JP6: S5 - S8 

Power Over Serial 

Connectors

•  Used to enable or disable power over serial for 

S5 - S8 connectors.

8

JP2: AUX Power 

Source Selector

•  Used to select the DC power source for Pin 9 on 

the DB9 connector.

• 

Internal 12V:

 Power supplied by 

motherboard’s PCI Express Slot.

• 

External 12V:

 Power supplied by J3 Power 

Connector.

• 

External 5V:

 Power supplied by J3 Power 

Connector.

9

J3 Aux. Power 

Connector

•  Used to connect an external power source to 

the 

Serial Card

.

Requirements

For the latest requirements, please visit 

www.startech.com/PEX8S1050LP

 

Installation

WARNING! 

PCI Express cards can be severely damaged by static electricity. Be sure 

that you are properly grounded before touching the 

Serial Card

.

1.  Turn Off the 

Host Computer.

 

2.  Remove the chassis cover from the 

Host Computer

.

3.  Locate a 

PCI Express Slot

, using a 

Screwdriver

 (sold separately) remove the

 Screw

 

used to secure the

 PCI Express Slot Cover

 and set the 

Screw

 aside.

4.  Align the 

PCI Express Connector

 on the 

Serial Card

 with a 

PCI Express Slot

. While 

applying pressure evenly across the top edge of the 

Serial Card

, insert the 

Serial 

Card 

into the 

PCI Express Slot

, ensuring that the 

Serial Card

 is properly aligned 

with the rear panel slot.

5.  Using a 

Screwdriver

 and the 

Screw

 removed in step 3, secure the 

Serial Card

 to 

the motherboard and rear chassis. Secure the additional serial port provided by the 

daughter board (smaller circuit board) to an adjacent rear bracket.

6

2

5

1

3

7

8

9

4

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