LK404-25-E Matrix Orbital, LK404-25-E Datasheet - Page 10

• Manufacturer Part Number: LK404-25-E
• Description: LCD Character Display Modules 40x4 Grn/Yel Ext Temp
• Manufacturer: Matrix Orbital

Specifications of LK404-25-E

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.1 DB-9 Connector
standard signal levels of ±12V to ±12V. It is also possible to communicate at TTL levels of 0 to +5V by
setting the Protocol Select Jumpers to TTL. As an added feature it is also possible to apply power through
pin 9 of the DB-9 Connector in order to reduce cable clutter. However, in order to accomplish this you must
set the Power Through DB-9 Jumper.
2.1.1 Power Through DB-9 Jumper
Power through DB-9 Jumper pictured in
Matrix Orbital
The LK404-25 provides a DB-9 Connector to readily interface with serial devices which use the EIA232
In order to provide power through pin 9 of the DB-9 Connector you must place a solder jumper on the
1
2
3
4
DB-9 Connector
Power Through DB9 Jumper
GPOs
Manual Override
Figure 11: RS-232 Pin out
figure 12
Figure 10: LK404-25
LK404-25
below. The LK404-25 allows all voltage models to use the
Pin
Pin
Pin
Pin
9
2
3
5
5
6
7
8
Power / Data Connector
Keypad Interface
Protocol Select Jumpers
Dallas 1-Wire Bridge
Rx \ SCL (I
Tx \ SDA (I
GND
PWR
9 Jumper. See table 1 on page 8 for
power requirements.)
(Must solder Power Through DB-
2
2
C clock)
C data)
6