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
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