Envision Peripherals CABLING THE NV3128, Data I/O, Cabling The Serial Command Interface, 2-14

2.3 CABLING THE NV3128

Figures 2-2 and 2-3 at the end of this section show the rear panel connections on the NV3128. Notice that there are old and new frames corresponding to the old Command Interpreter and the new Universal Control Card.

2.3.1 DATA I/O

Machine control I/O connections to the rear panel are straightforward. D connectors terminated according to the following pin-out are plugged into any of the 128 terminals provided.

2.3.2 CABLING THE SERIAL COMMAND INTERFACE

The control-system interface cable connects to the jack marked RS- 422 PRIMARY CNTRL" on the new frames or "RS-422/RS232 - Controlled In" on the old frames. To implement a loop-through connection for a multidrop, networked command environment, connect the next piece of equipment to the looping connector next to the primary control connector. It should be noted that the maximum number of chained connections is six without undue signal degradation.

RS-422A:

An RS-422A cable connecting the Controller to the primary control data connector should be a nine-wire cable meeting the EIA RS-422 specification. The connector at the NV3128 end must be a nine-pin D connector with male pins. The connector at the controller side is typically a nine-pin D connector with male pins. The connection list follows:

NV3128 RS-422A Machine-Control Routing Switch 2-14