Proton SL mini 1220 User Manual

Page 86 of 126
Proton Products SL mini and SLR mini Series Speed and Length Gauges Instruction Manual - issue 1s
STANDARD ELECTRICAL INTERFACES
LOGIC INPUTS
Logic inputs connection
Two logic inputs are fitted as standard and may be accessed through the following pins:
Connector type: DB25 female (socket)
Functional
group
Pin
Designation
Description
Notes
Shield
S
Shield
Shield
Connect to cable and plug shields
Power
supply and
ground
2
DGND
Power supply and
signal ground (0V)
15
24
Logic
inputs
3
LIN1
Logic input 1
Low state (logic 0) voltage < +3V
High state (logic 1) voltage > +10.5V
Maximum input voltage ±30V
4
LIN2
Logic input 2
5
LIN3
Logic input 3
Logic inputs electrical specification
 Logic inputs are NOT isolated from earth.
 Inputs are internally pulled up to +15V via 8.2kΩ resistors; unconnected inputs default to the high
state.
 Inputs will source a minimum current of 3mA when externally pulled down to the low state.
Specification
Minimum
Typical
Maximum
Units
Low state (logic 0) input voltage
3
V
High state (logic 1) input voltage
10.5
V
Absolute input voltage
-30
30
V
Low state source current
3
mA
Logic inputs can be connected to different types of signal sources as follows:
Signal source
Connection method
Mechanical or solid
state relay contact
Connect between logic input and DGND.
Pull-down
Connect the pull-down signal to the logic input and ground to DGND.
Pull-up
 Connect an 820Ω resistor between the logic input and DGND to pull the
input down to 2.5V.
 Connect the pull-up signal source to the logic input and ground to DGND.
 For 24V signals (such as from a PLC), the power dissipation in the 820Ω
resistor can be reduced by connecting another 820Ω in series between the
pull-up signal source and logic input.
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22 10 23 11 24 12 25 13

Proton SL mini 1220 Specifications

General

Brand	Proton
Model	SL mini 1220
Category	Security Sensors
Language	English