The devices have current limiting.（P3 table 1)
Is it the maximum supply electric current of the visoout terminal?
Becacuse Fig11 shows When Vcc=5V、Max current is about 55 mA,I think that it is not driver output
The 'IOS current' is the Driver output short circuit current. This test ensures that the ADM2587E is not destroyed by excessive current flowing through the output pins. In the event of a short circuit on the driver outputs the maximum current is 200 mA, this meets the requirements of the RS-485 standard: EIA-485-A-98.
Figure 11 is not related to the 'IOS current' specification. Figure 11 characterizes the Receiver Output voltage and current.
The data sheet page 17 provides you with information for the VISO current capabilities.
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