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© Sealevel Systems, Inc.
R5120 & R5140 Manual | SL9212 10/2021
Technical Description, Continued
Jumper Description
Function
(J1) Jumper Setting
Normal Mode (Default)
5V
12V
DCD 5V
RI 12V
(J2, J3, J4) COM1 RS-232/422/485 Configuration
Use the jumpers (J2), (J3) and (J4) to set the electrical interface for COM1 from RS-232 to RS-422 or
RS-485. All three sets of jumpers must be properly configured.
Function
(J2) Jumper Setting
(J3) Jumper
Setting)
(J4) Jumper Setting
RS-232
RS-422
RS-485