MAWA-050A
2. Installation and Connections
2-17
(3) Interface
(3) -1. Explanation of external input/output signals
(3) -1-1. Input connector (D-Sub 37-pin, female)
Remarks
EM1, EM2, EM1_COM, and EM2_COM are non-voltage contact inputs of +24 V DC/30 mA.
Other inputs are photo coupler inputs of +24 V DC/approx. 10 mA.
For connecting to the input connector, use D-Sub connector 37-pin, male.
Recommended
parts
Connector
HDCB-37P(05) (HIROSE ELECTRIC CO.,LTD.)
Case
HDC-CTH(10) (HIROSE ELECTRIC CO.,LTD.)
Input signals
Terminal
No.
Terminal name
Explanation
1 WELD
STOP
To stop the welding on the way, this terminal is closed.
When the circuit is closed while waiting start, the READY signal is turned
OFF.
2 START
Welding start input terminal.
The sequence is started by closing this terminal.
3 SCH1
Condition input terminal.
3 = Condition 1, 4 = Condition 2, 5 = Condition 4, 6 = Condition 8,
7 = Condition 16, 8 = Condition 32, 9 = Condition 64
(Refer to SCHEDULE of “6. (8) Schedule Changeover.”)
4 SCH2
5 SCH4
6 SCH8
7 SCH16
8 SCH32
9 SCH64
10 PARITY
Parity input terminal.
A fault due to wire breakage of the condition selection signal can be
detected by this terminal. Perform a setting so that the total of condition
selection signal lines and parity signal close-circuits may be an “odd
number” at all times.
(Refer to SCHEDULE of “6. (8) Schedule Changeover.”)
11 PURGE
When the circuit is closed, the internal solenoid valve is turned on to allow a
gas flow. When the circuit is opened, the solenoid valve is turned off to
stop the gas flow. (*3)
12 RESET
Error resetting input terminal.
When the circuit is closed after the cause of the error is removed, the error
is reset.
13
EM_RESET
Error resetting input terminal exclusively for an emergency stop error.
16
EM1
Emergency stop 1 input terminal. (*1)
17
EM2
Emergency stop 2 input terminal. (*1)
18
EM2_COM
Common of the emergency stop 2 input terminal.
