A&D AD-4408A Instruction Manual download pdf (Page 6)

Table 2 Communication LED (COM)

LED state Description

OFF Offline / No power

Yellow ON Online (Normal)

Red ON Communication error

2.2. Communication Connector

NOTE: The illustration below shows how the interface module is positioned when

installed to the AD-4408A.

Fig.3 Connector pin assignment

Functions for each pin are as follows.

Table 3 Communication connector

Pin No. Signal Description

Housing SHIELD Shield (Connected to the AD-4408A FG terminal)

1 SG Signal ground

2 5V Not used

3 PMC

Selects the signal level.

RS-232: Connect to pin 2.

RS-485: Leave pin 3 disconnected

4 __ __

5 B (+) RS-485 B line (Positive side)

6 __ __

7 RX RS-232 RxD

8 TX RS-232 TxD

9 A (-) RS-485 A line (Negative side)

By pin connections, a signal level can be selected either for RS-232 or RS-485.

Communication

connector

1 2 3 4 5 6 7 8 9 10 11 ... 21 22

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A&D AD-4408A Instruction Manual Page 6