15
ISOMET
RFA741
Connection Summary
1.0
15 way ‘D’ Type Control Connection
Signal (see notes)
Type
Pin out connection
NECESSARY
Digital Gate (slow)**
Input
Signal pin 8
PLC high (5v<V<24v) = ON
Return pin 15
PLC low (0.0v<V<4v) or NC = OFF
Frequency Modulation (fast)*
Input
Signal pin 7
TTL high (2.7v<V<6.0v) = 40.0MHz
Return pin 14
TTL low (0.0v<V<0.8v) = 50.67MHz
Interlock ***
Input
Connect to AOM “INT”
Normally closed
OPTIONAL
‘Enabled’ monitor
Output
Signal pin 2
(Open collector logic, Low = OK)
Return pin 10
Maximum applied voltage
(via external pull up resistor) = 24V
Maximum current = 20mA
‘RF Status’ monitor
Output
Signal pin 3
(Open collector logic, Low = OK)
Return pin 10
Maximum applied voltage
(via external pull up resistor) = 24V
Maximum current = 20mA
I2C Clock
Input
Signal pin 5
(0.0v<V<5.0v)
Return pin 13
I2C Data IO
In/Out
Signal pin 6
(0.0v<V<5.0v)
Return pin 13
POT Select Control, S0
Input
Signal pin 1
PLC high (5v<V<24v) = Digital Pot
Return pin 9
PLC low (0.0v<V<4v) or NC = Manual Adjust
