EEC SE 7430, Руководство пользователя, Страница: 79 / 106

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7. Connection of Remote I/O
Two 9-pin “D” type connectors mounted on the rear panel provide REMOTE-INPUT-OUTPUT
control and information. These connectors mate with a standard 9 pin D-sub-miniature connector
provided by the user. The output mates to a male (plug) connector while the input mates to a
female (receptacle) connector. For best performance, a shielded cable should be used. To avoid
ground loops the shield should not be grounded at both ends of the cable. Suggested AMP part
numbers for interconnecting to the Remote I/O are shown below:
7.1 Remote Signal Outputs
The rear panel connector provides three output signals to remotely monitor PASS, FAIL, and
PROCESSING conditions. The monitoring signals are provided by three normally open internal
relays that toggle ON and OFF to indicate the condition of the tester. These are normally open free
contacts and will not provide any voltage or current. The ratings of the contacts are 1 AAC / 120
VAC (0.5 ADC / 24 VDC). The signal outputs are provided on the 9-pin female “D” type connector.
Below is a list that indicates what conditions activate each pin. When a terminal becomes active
the relay closes thereby allowing the external voltage to operate an external device.
Pins 1 and 2 provide the PASS signal.
Pins 3 and 4 provide the FAIL signal.
Pins 5 and 6 provide the PROCESSING signal.
Pins 7 and 8 provide the RESET signal.
The following describes how the relays operate for each test condition:
PROCESSING – The relay contact closes the connection between pin (5) and pin (6) while the
instrument is performing a test. The connection is opened at the end of the test.