Matrix-orbital LK162-12 Legacy Instrukcja Użytkownika Strona 16
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Oceniono. / 5. Na podstawie oceny klientów
LK162-12 rev 4 16
Figure 2-8 General Purpose Outputs
Maximum allowable current is 20mA, which is enforced by the current limiting resistor. If the device being
switched has a resistance of 240 ohms or more the corresponding resistor may be shorted.
Note: The GPOs do not have any over current or over/under voltage protection so care must be taken when
using them. For instance if the external device is a relay it must be fully clamped (using a diode and
capacitor) to absorb any generated back electro-motive force (EMF).
10 - 100 u
F
1N4001
Relay
coil
GPO
+-
Figure 2-9 Clamping a Relay
- LK162-12 1
- Table of Contents 2
- Revisions 4
- 1. Introduction 5
- 1.6 Trying out a Keypad 7
- 1.7 Manual Override 8
- 1.8 Memory Chip Lock Down 8
- Warning: 10
- PC wiring 11
- Display module wirin 11
- 2.1.4 DB9 Connection 13
- 2.1.6 TTL Communications 14
- 2.1.7 I²C Communications 14
- 2.2 General Purpose Outputs 15
- 10 - 100 u 16
- 3. Displaying Text 17
- 3.4 Text Commands 18
- 4. Keypad Interface 20
- C Interface 21
- 4.4 RS-232 Interface 21
- 4.5 Keypad Commands 21
- Figure 4-2 Poll timing 22
- 4.5.6 Poll keypad (254 38) 23
- 5.1 Command List 24
- 6. Miscellaneous Commands 27
- 6.1.12 Set I 29
- C address 254 51 [address]) 29
- 6.2 Flow Control 31
- 7. Appendix: Command Summary 32
- 7.4 Text Commands 33
- LK162-12 rev 4 34 34
- LK162-12 rev 4 35 35
- LK162-12 rev 4 36 36
- 7.7 Miscellaneous Commands 37
- LK162-12 rev 4 38 38
- 8.1 Specifications 39
- 8.2 Options 40
- 9. Appendix: Glossary 41
- LK162-12 rev 4 42 42
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