4.7.4
Port 2: RS-485
4.7.4.1
Pin Assignments for Port 2
Port 2 is an RS-485 port with a 15-pin female D-sub connector. This can be attached
directly to an RS-485 to RS-232 adapter.
Pin
Signal
Direction
Function
1
SHLD
–
Cable Shield Drain wire connection
2, 3, 4
n/c
5
P5V
Output
+5.1VDC to power external devices
(100mA max.)
6
RTSA
Output
Request to Send (A) output
7
GND
–
0V/GND reference signal
8
CTSB’
Input
Clear to Send (B) input
9
RT
–
Resistor Termination (120 ohm) for RDA’
10
RDA’
Input
Receive Data (A) input
11
RDB’
Input
Receive Data (B) input
12
SDA
Output
Transmit Data (A) output
13
SDB
Output
Transmit Data (B) output
14
RTSB
Output
Request to Send (B) output
15
CTSA’
Input
Clear to Send (A) input
Shell
SHLD
–
Cable Shield wire connection / 100%
(Continuous) shielding cable shield
connection
4.7.4.2
Connector and Cable Specifications for Port 2
Vendor Part numbers below are provided for reference only. Any part that meets the same
specification can be used.
Cable:
Low Capacitance Computer cable, overall braid over foil shield
Belden 8105
5 Twisted-pairs
†
Shield Drain Wire
†
30 Volt / 80°C (176°F)
24 AWG tinned copper, 7x32 stranding
Velocity of Propagation = 78%
Nominal Impedance = 100W
†
15 Pin Male
Connector:
Type:
Vendor:
Plug:
Pin:
Crimp
ITT/Cannon
DAA15PK87F0
030-2487-017
AMP
205206-1
66506-9
Solder
ITT/Cannon
ZDA15P
–
AMP
747908-2
–
64
GFK-1503E
VersaMax PLC User Manual
For public disclosure
Summary of Contents for VersaMax PLC
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