
9
VDC indicates power is present. TX is flashing when data is transmitted from the DSB
500 and the RX is flashing if data is received from the connection.
The DSB492 drives a total load of 5.0-volt idle voltage. This voltage makes the sum of
the idle-pump-load, the connection wire drop and the noise margin.
RS-232/RS-422/CL Interface Module (DBS 500)
Part # M08037B002S
RS-422 POS connection
T+, T-, R+, R-
CL 45mA passive POS
connection
Power LED (Yellow)
Transmit LED (green)
Receive LED (red)
Connection to the
Central Processor
Board. *Must plug into
Port 11
RS-232 POS connection
TX, RX, GND