Proton SL mini 1220, Instruction Manual

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Page 119 of 126
Proton Products SL mini and SLR mini Series Speed and Length Gauges Instruction Manual - issue 1s
PSU-BOB-SL-mini Screw Terminal Designations (for SL mini and SLR mini gauges only):
Connector type: Screw terminals
Functional
group Screw
terminal
Designation Description Notes
Logic
inputs
3 LIN1 Logic input 1 Low < +3V; High > +10.5V; Max
±30V
User configurable function.
4 LIN2 Logic input 2
5 LIN3 Logic input 3
25 +24V Power supply
Operating voltage: 15 to 28VDC
Power consumption: 15W
2 DGND
Power supply and
signal ground
reference
15 DGND
24 DGND
PSU-BOB-SL-mini screw terminal numbers correspond directly to DB25 interface socket pin numbers.
Logic input electrical characteristics

Logic inputs are referenced to pin 15 (DGND). Pin 15 is internally connected to the enclosure
earth so all voltages are also referenced to earth.

A low state (logic 0) is defined as a voltage below +3V.

A high state (logic 1) is defined as a voltage above +10.5V.

The safe input voltage range is
–
30V to +30V.
 All inputs are internally pulled up via a 5.1kΩ
resistor to an in15V source, thus inputs left
open circuit default to the high state.

The logic input requires a current of 3mA to pull it down to the low state.
Connection to the logic input depends on the signal source as follows:

Solid state or mechanical relay contact: connect between pin 15 (DGND) and logic input pin.

Pull-down: Connect ground to pin 15 (DGND) and signal to the logic input pin.

Pull-up: Connect an 820
kΩ resistor from the logic input
pin to pin 15 (DGND); this will pull down
the input to 2.5V when the pull-up is switched off. Connect ground to pin 15 (DGND) and signal to
the logic input pin. If the signal is 24V, then power loss in the resistor across the input can be
reduced by adding an 820
kΩ
resistor in series with the signal.
Gauge software configuration
The behaviour of the gauge can be configured via RS232, the optional AiG2 display unit or optional
PCIS software. The following three configuration settings need to be adjusted:
1.
Configure both light barrier logic input functions to “Length hold” mode.
2. Configure both light barrier logic input active states to active when the light barriers are clear
(no object) :