CyberResearch
®
Serial Communications
COMHP 7404/-D25
Interface Mode Examples SW1 – SW4
1 2 3 4
ON
OFF
AT RT NE T
Figure 1- Switches SW1- SW4, RS-422
1 2 3 4
ON
OFF
AT RT NE T
Figure 2 - Switches SW1- SW4, RS-485 ‘Auto’ Enabled, with ‘No Echo’ and the termination resistor in circuit.
1 2 3 4
ON
OFF
AT RT NE T
Figure 3 - Switches SW1- SW4, RS-485 ‘Auto’ Enabled, with ‘Echo’ and no termination resistor in circuit.
CyberResearch, Inc
.
3
25 Business Park Drive
P: (203) 643-5000; F: (203) 643-5001
Branford, CT USA
www.cyberresearch.com
