User manual
70 Chapter 12  Reference and Certifications 
Device EIA 232/422/485 Switch Settings
Note: MEI Switch settings apply only to Digi One TS, PortServer TS 2/4 MEI, and 
the Wireless Family. 
RJ-45 Pinouts
Safety Statements
PortServer TS 8/16
WARNING: To prevent electric shock, do not remove the cover of this 
module while unit is powered up. There are no user-serviceable parts 
inside. Refer servicing to qualified personnel.
CAUTION: This unit has two power inputs. For total isolation from electrical 
shock and energy hazard, disconnect both power inputs. The device is 
intended to be mounted in an indoor only type system.
Function
Switch Settings
1 2 3 4
EIA-232 Up Down Down Down
EIA-422/485 Full-duplex Down Up Down If up, termination. 
If down, 
no termination
EIA-485 half-duplex Down Down Up
RJ-45 
Pin
EIA-232
EIA-422/485
Full-Duplex
EIA-485 Half-
Duplex
1 RI TxD- TxD-
2 DSR RxD- RxD-
3RTS RTS+ NA
4 GND GND GND
5 TxD TxD+ TxD+
6 RxD RxD+ RxD+
7SG SG SG
8CTS CTS+ NA
9DTR RTS- NA
10 DCD CTS- NA










