Rockwell Automation 45MLA Controller Installation Instructions - Manual (Page 10)

10
Functional Description—RS 485 Comm. Model
Figure 6: RS485 Control Unit Extension PCB
Pin Listings
The allocation of pins on the main connector, J2, for use with the
RS485 controller model is described below.
Table 17: J2 Pin Listings
The following table describes the connectivity of connector J16,
the RS485 connection, which is located on the extension PCB.
Table 18: J16 Pin Listings
Pin Signal Description Remarks
1 0V DC Power —
2 +24V DC Power —
3 Ground Ground —
4 Not connected Not connected —
5 In 2 Trigger and hold See User Manual
6 In 1 Not used Not used
7 Out 2 Light array interrupted 
0V DC = interrupted
24V DC = not interrupted
8 Out 1 Overhang 24V DC = no overhang
 Or over-height (special function)
Pin 2 Wire 4 Wire
1 0 VDC 0 VDC
2 - Rx+
3 Shielding Shielding
4 - Rx-
5 B Tx+
6 A Tx-
PNP
D7 LED - Power
RS485
Extension
PCB
D3 LED Out 1
D4 LED Out 2
D9 Error
D8 Com Tx
D6 LED In 2
D5 LED In 1
RJ45 Connector
Emitter
RJ45 Connector
Receiver
D2 LED
D1 LED
Pot 2
Pot 1
Removable
Spring-Loaded
Connector
S1
J2
J12
J13
S2
Out 1
Out 2
In 1
In 2
n. c.
Earth.
24 VDC
0 VDC
In 2
PNP
NPN
PNP
NPN
In 1
Input
Logic
Jumpers
In 2
PNP
NPN
PNP
NPN
In 1
Input
Logic
Jumpers
The following figure provides additional information on the
impedances associated with each of the RS485 inputs.
Figure 7: Input Schematic of the RS485 Terminal
LED Indicators
The following table describes LED D8 and D9 on the RS485
extension PCB.
Table 19: RS485 Controller LED Status
LED Description Color Meaning
D8 Data communication
Off No communication
Green flashing Communication active
D9 RS485 Error
Off No RS485 error
Red RS485 error