4. external i/o connection, 4-1. external output connection, 4-2. external input connection – FUTEK IPM600 (D610) Digital Display User Manual
Page 23: External i/o connection, External output connection, External input connection
3.CONNECTION
12
3-4. External I/O Connection
3-4-1. External Output Connection
The external output circuit is operated through an open collector. A3 COM1 is the
common terminal. The open collector output capacity is 30mA and the withstand voltage
is up to 30V.
Equivalent circuit
3-4-2. External Input Connection
A signal is inputted to the signal input circuit by short-circuiting or opening the input
terminal and the COM2 terminal. Short-circuiting is effected by means of a contact (such
as a relay or a switch) or a noncontact (such as a transistor or an open-collector TTL).
COM1
Spark Killer
Load
F371 Inside
Spark Killer
DC
Varistor
Load
AC
Relay
Vext
A3
Supply an external power source for a relay drive
Output Data
Tr
0
OFF
1
ON
Output Transistor Status
power source (Vext).
Power
Supply
Power
Supply
COM2
Push
Switch
Torque
Switch
Relay
+12V
TTL Open
Collector
F371 Inside
A6
IN
IN
Open
OFF
Short
ON
- The external element is required to withstand Ic=10mA.
- Leakage from the external element is required to be
100
A or below.