6

User-Built Cable #4: VMSE RS-422 Terminals to PLC

This cable is not currently sold by GE Fanuc. Details are provides so you can build your own cable.

Application:

Connects the VMSE terminal block screw terminals to a PLC 15-pin, D-sub, RS- 422/RS-485 port such as is used on Series 90-30, Series 90-70, and VeraMax PLCs. Note that the VMSE switch must be set in the RS-422 position and the firmware configuration parameter “Interface Type” must be set to RS-422 (“Interface Type” set to RS-485 will not work).

To VMSE Screw

Terminals

Male Connector

(15-Pin, D-Sub)

To PLC

RS-422/485

Serial Port

Figure 6-12. VMSE Screw Terminals to 15-Pin D-Sub PLC Serial Port

 

 

 

 

100 ohm, 1/2 w resistor**

D-Sub Connector

VMSE

 

 

 

 

 

 

 

 

RX (A) -

 

 

 

TP*

 

12

- SD (A)

 

 

 

 

 

RX (B) -

 

 

 

 

13

- SD (B)

 

 

 

 

 

 

 

 

TX (B) -

 

 

 

TP*

 

11

- RD (B’)

 

TX (A) -

 

 

 

 

10

- RD (A’)

 

 

 

 

 

 

 

 

Signal Gnd. -

 

 

 

 

 

 

7 -

Signal Gnd.

 

 

 

 

 

 

 

 

1 - Shield

 

 

 

 

 

 

 

 

 

 

 

**

 

9 -

Term. Resis.

 

 

 

 

 

 

 

 

 

 

 

 

6 - RTS (A)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

- CTS (A’)

 

* TP = Twisted Pair

 

8 - CTS (B’)

 

** If using a multidrop arrangement,

 

14

- RTS (B’)

 

terminate only at the first and last

 

 

 

 

 

 

receive terminals.

 

 

 

 

Figure 6-13. Wiring Diagram

Specifications

D-Sub Connector: Male, 15-pin

Cable: Shielded, twisted-pair rated for RS-485 use. Ground shield at one end only, as shown above.

Maximum cable length: 1200 meters (4,000 feet)

VMSE Switch setting: Set to RS-422 position (see Figures 6-2 and 6-3). Also, the “Interface Type” configuration parameter must be set to RS-422.

6-8

VersaMax Serial to Ethernet Adapter User's Manual – July 2000

GFK-1852

Page 55
Image 55
GE GFK-1852 user manual User-Built Cable #4 Vmse RS-422 Terminals to PLC, To PLC RS-422/485 Serial Port

GFK-1852 specifications

The GE GFK-1852 is an advanced communication and control processor designed for industrial automation solutions. It serves as a critical component in the realm of programmable logic controllers (PLCs) and offers robust features that enhance operational efficiency across various sectors.

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