April 2010
Page | 8
2.5.2
SERIAL PORT 2 (SP2) WIRING
The SP2 connector
is used to connect the Marquee to the PLCs via
RS-232
or RS 422/485
(only
one at a time) communication. If the user is using PLC over Ethernet, no wiring is required on
this port. See Fig 2.3.2 below for Marquee to PLC connections.
Fig 2.3.2 SP2 Pin-out and PLC wiring
Pin
Number
Pin Function (from the
Marquee’s perspective)
Marquee serial
Communication
1
N.C.
2
TXD
RS- 232
3
RXD
RS- 232
4
N.C.
5
GND
RS- 232 / 422 / 485
6
N.C.
7
N.C.
8
N.C.
9
RD+ (Receive Data)
RS- 422 / 485
10
RD- (Receive Data)
RS- 422 / 485
11
SD+ (Send Data)
RS- 422 / 485
12
SD- (Send Data)
RS- 422 / 485
