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ISP - Rev 6/95
OPTO-ISOLATED INHIBIT
+5V
ISP ENABLED BY ACTIVE LOW OR CLOSED CONTACT
C
R18
V
+5
R1
MBA-ISP/... ISP CONTROL BOARD
Inhibit
+5V
ISP ENABLED BY ACTIVE HIGH OR CLOSED CONTACT
C
R18
+5
R1
MBA-ISP/... ISP CONTROL BOARD
Inhibit
V
R1 = 100 x V (ohm)
V - Voltage at the inhibit input.
Standard value is 2.4K (for 24V). Source must be capable to source or sink 10mA.