22
Appendices
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 Method
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 Method or serial comm
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
IH
≥ 2V
I
IH
≤ 20µA
V
IL
≤ 0.4V
I
IL
≤ 0.5mA
Outputs: V
OH
≥ 3.8V I
OH
≤ 6mA
V
OL
≤ 0.4V I
OL
≤ 6mA
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.
User I/O Connector Specifications
Pump 11 Elite OEM Module
USER’S MANUAL
phone
508.893.8999
fax
508.429.5732
web
www.harvardapparatus.com
Pump 11 Elite OEM Module Series User’s Manual
•
Publication 5420-007 Rev B
