66 Installation Guide APC Silcon 240-320kW 480V UPS
990-4049
Options/Accessories
Remote Display. The converter provides optical signal isolation. Both converter boxes must be
supplied by an uninterruptible power source.
6.4.1.1 Connections Without Converter
Connect a 25-pin female Sub-D and a 9-pin male Sub-D connector with a 3-wire shielded cable,
as shown in the table below. Connect shield at one end only.
Pin Connection for Interconnection Cable (without converter)
6.4.1.2 Connections With Converter
Connections to be made according to converter manual.
Pin connection example only:
The ME800A-R2 must be set up as a DCE with no RTS/DTR control.
The interconnection cable between the two ME800A-R2 boxes is a 4-wire twisted pair
telephone cable with or without shield. The shield improves noise immunity but reduces
maximum communication distance.
Host (DTE) Remote Display (DTE)
25-pin female
pin No.
9-pin male
pin No.
2 (TXD) 2 (RXD)
3 (RXD) 3 (TXD)
7 (GND) 5 (GND)
House (shield) No Connection
Pin Connections for cable
from host to ME800A-R2.
Pin connection for cable from
ME800A-R2 to Remote Display
Host
(DTE)
ME800A-R2
(DCE)
ME800A-R2
(DCE)
Remote Display
(DTE)
25-pin female
pin No.
25-pin male
pin No
25-pin male
pin No
9-pin male
pin No
2 (TXD) 3 3 2 (RXD)
3 (RXD) 2 2 3 (TXD)
7 (GND) 7 7 5 (GND)
House (Shield) No connection No connection House (Shield)