Appendix C: External Connections; User I/O Connector Specifications - KD Scientific KDS LEGATO 100 User Manual

APPENDIX C: EXTERNAL CONNECTIONS

User I/O Connector Specifications

Pin Assignments
1. Direction control input
Rising edge sets pump to infuse
Falling edge sets pump to refill
2. Trigger Input
Event trigger – falling edge triggers a program event
3. Footswitch Input (or Timer)
Settable to work as:
-Momentary switch closure to ground or TTL Logic
Low; falling edge toggles between states (run/stop)
-Starts on rising edge, stops on falling edge
-Starts on falling edge, stops on rising edge
4. Trigger 1 Output
TTL Logic Output-Default = Low Control thru program
or serial comm
6. Sync Output
TTL Logic Output –
Rising Edge = Start Infuse
Falling Edge= Start Refill
7. Direction Output
TTL Logic Output –
High = Refill
Low = Infuse
9-13. Signal Return / Ground
14. Run Indicator Voltage
+5V through a 470 ohm resistor (connect to LED
Anode)
15. Run Indicator Output
TTL Logic Output, active low (low = run) (connect to
LED Cathode)
Electrical Specifications
Inputs: V ≥ 2V I
IH IH
V ≤ 0.4V I
IL IL
Outputs: V ≥ 3.8V I
OH OH
V ≤ 0.4V I
OL OL
508.429.6809
phone
info@kdscientific.com
e-mail
All Inputs are pulled high to +5 Vdc through a 10k
resistor All Outputs are at TTL Logic Levels. Pulse duration
should be 0.1s minimum.
≤ 20µA
≤ 0.5mA
≤ 6mA
≤ 6mA
508.893.0160
fax
www.kdscientific.com
web
Appendices
User I/O Connector Specifications
KD Scientific Legato 100 Series Syringe Pump User's Manual
Publication 5617-006-REV-2.0
63