Remote control – LG 3803 User Manual
Page 41
7. REMOTE CONTROL
This instrument can be remotely controlled (e.g., increments or decrements preset data) via
the REMOTE CONTROL connector.
(1) Major Function
Increment, decrement, returning group top
(2) Connector
57LE-40240-7700 (DDK Ltd.) or equivalent
(3) Input Level
TTL (Pull up to +3.3 V)
(4) Input Logic
Negative logic
(5) Output Level
TTL (GO/NO-GO), open collector (Alarm)
(6) Fan Out
1 each
(7) Output Voltage
+12 V (Alarm)
(8) Output Logic
Positive logic/negative logic (GO/NO-GO), negative logic (Alarm)
(9) Pin Assignments
See Table 7-1
Table 7-1 Pin assignments
No. Name Input/Output
No.
Name
Input/Output
1
INC
Input
13
GO (Positive logic)
Output
2
DEC
Input
14
GO (Negative logic)
Output
3
RETURN
Input
15
NO-GO (Positive logic)
Output
4
Reserve
16
NO-GO (Negative logic)
Output
5 Reserve
17
Alarm
Output
6 Reserve
18
N.
C.
7 Reserve
19
N.
C.
8 Reserve
20
N.
C.
9
N. C.
21
N. C.
10
N. C.
22
N. C.
11 GND
GND 23
GND
GND
12 GND
GND 24
GND
GND
＊
About REMOTE CONTROL connector
• Do not apply external voltage to the output pins except Alarm pin.
• All pins are pulled up to +3.3 V. When externally control this instrument, do not apply
voltage exceeding +5.0 V or negative voltages.
＊
Recalling preset conditions via the REMOTE CONTROL connector
• The preset conditions between the Begin and End address can be recalled by using
the INC/DEC pins. The INC, DEC, and RETURN pins are Low active. Assert for at
least one second.
• After setting is performed, wait for at least one second for the next setting.
＊
GO/NO-GO output pins
• Outputs TTL High or Low for GO/NO-GO judgement.
＊
Alarm output pin
• Outputs OR of three types of alarms displayed on the top screen in negative logic.
Since the open collector output is used, pull up the circuit for connection.
＊
Operation while using GPIB and Ethernet
• The REMOTE CONTROL connector is enabled even when operating the instrument
via the GPIB (in remote control mode) and Ethernet. When the REMOTE CONTROL
connector is not used, disconnect any equipment from the connector.
7-1