Technical data

Chapter 2: Installation
Electrical Connections
(9/00) 2-17
COM2/COM4 RS-232 (Controller PCB Serial Port)
The following describes COM2 pin-to-pin cable connections using an RS-232 cable and
the connections to COM4 when an optional Multifunction I/O PCB is installed. The
maximum recommended cable length for RS-232 is 50 feet (15.24 meters). Maximum
recommended total distance for RS-422 and RS-485 is 2000 feet (609.6 meters).
JAGXTREME Terminal COM2/COM4
!
TXD RS-232 Transmit
!
RXD RS-232 Receive
!
GND Signal Ground
!
TXD+ RS-422/485 Transmit +
!
TXD- RS-422/485 Transmit -
!
RXD+ RS-422/485 Receive +
!
RXD- RS-422/485 Receive -
!
+20 V +20 VDC Supply
Pin Connection for METTLER TOLEDO Devices Using COM2 RS-485
JAGXTREME
Terminal
COM2
8622 8806 8842 8844 8855*** 8860** MP750
8804** 8840 8843 8845 8856 8865
8617-TB2
9323-TB2
9325-TB2
8618
TXDB 3* 2

RXDB
  
GND 7* 3

TXD+  
RS-485B
TXD−  
RS-485A
RXD+   
RXD−   
+20 V   
*Each of these devices uses this connection.
**Pinout shown is for use without Plug In Adapter, (8804 P/N 127358 00A; 8860 P/N 128019 00A).
***The 8855 using RS-232 must have the 129618 00A Interface PCB. The JAGXTREME terminal must be set to 300 baud. If the interface PCB
is part number 123654 00A or 137651 00A, the JAGXTREME terminal TXDA terminal must be connected to Pin 2 of the 8855 Interface PCB.
In this case the JAGXTREME terminal must be set to 1200 baud.
The W2 jumper on the
Multifunction I/O PCB determines
the COM4+20 V terminal voltage
output. Please refer to the section
entitled JAGXTREME Terminal
Jumper and Switch Settings in
this chapter.