Hitachi 902 - RSDIST Board (713-5003)

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10.9 RSDIST Board
(1) Explanation of Circuit Board
This circuit board interrupts/distributes RS-232C signals of the ECPU237 and EMIO100
boards. The board is provided with the current loop function for the host and permits
changeover through DIP switch setting.
The board is also provided with an alarm buzzer, whose volume can be adjusted with
VR1.
(2) External View
(
115
)
(270)
Buzzer
FG
terminal
Setting of SW1
No. 1 OFF: RS-232C ON: Current loop
No. 2 to 4 Normally OFF
Buzzer volume adjustment