DNF Controls SW2X1 User Manual

12843 Foothill Blvd. Suite C
Sylmar, California 91342
V: 818.898.3380
F: 818.898.3360
[e-mail]

Model No. SW2X1

-GPI SWITCHER

-RS422 SWITCHER

USER MANUAL

Rev. 1.2

For Use with Rev 2.0 Hardware

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Table of Contents

1. STANDARD FEATURES 4

2. INSTALLATION SW2X1-GPI 4

3. CONNECTION DIAGRAM SW2X1-GPI 5

4. INSTALLATION SW2X1-RS422 6

5. CONNECTION DIAGRAM SW2X1-RS422 6

6. MODE SELECTION SW2X1-GPI 7

a. MODE 1 7
b. MODE 2 7

7. MODE SELECTION SW2X1-RS422
(LOCAL / REMOTE CONTROL) 8

a. MODE 1 8
b. MODE 2 8

8. MODE SELECTION SW2X1-RS422 (2X1 / 1X2 MODE) 9

a. MODE 1 9
b. MODE 2 9

9. WIRING EXAMPLE 10

10. SPECIFICATIONS 11

A. OVERALL 11
B. SW2X1-GPI 12
C. SW2X1-RS422 12

11. FRONT / REAR VIEW 13

a. FRONT VIEW: SW2X1-GPI 13

DNF CONTROLS LIMITED WARRANTY 14

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REVISION HISTORY

072707 Rev. 1.00 Original manual

081707 Rev. 1.01 Added GPI wet-dry jumper description.

102411 Rev. 1.1 Added 1x2 mode for SW2X1-RS422

082312 Rev 1.2 Added polarity indicators to RS422 pin outs

061113 Rev 1.3 Revised wet and dry jumper configuration for SW2x1
GPI

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1. STANDARD FEATURES



The SW2X1, Electronic A / B switch has 2 buffered inputs and one
buffered output for easy interfacing. There are no mechanical multi-pole
switches to wear out or fail.



Front panel control and remote control provide flexible operation to fit
your specific application.



Quickly and easily switch from primary system to backup system at the
press of a button.



In the event of power failure, on-board bypass relays switches “A” input to
output.

2. INSTALLATION SW2X1-GPI

a. Chose whether the GPI will be self powered or have power supplied by

the source equipment. Each GPI is independently settable.

JUMPERS: J1 – J8

Revision 08/16/07

DRY: External circuit powers
INPUT opto-isolator

INPUT is isolated from other inputs

Place jumper over pins 2 and 3

WET: SW2X1 powers INPUT opto­isolator

External circuit provides path to
ground

Place jumper over pins 1 and 2

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b. Connect primary GPO source to the A input connector, use male D9

cable connector.

c. connect secondary GPO source to the B input connector, use male D9

cable connector.

d. Connect the destination GPI connections to the Output connector.

e. Connect the power supply’s connector (9-pin female D) into the

housing’s POWER connector (male 9-pin D). The PWR LED on front
panel will light. Power supply is +5VDC. 2A.

f. NOTE: The Power-up state defaults to input A and its status indicator

will light.

Installation is complete.

3. CONNECTION DIAGRAM SW2X1-GPI

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