Rice Lake 920i USB Programmable Indicator Controller - 6V DC-to-DC Power Supply - Manual

6V DC-to-DC Power Supply Installation Instructions
PN 97474
The 6-volt DC-to-DC power supply, PN 97474, uses a DC power source of 9–36VDC to provide +/- 6VDC power
to the 720i, 820i or 920i CPU board. This is a 25 Watt power supply, suitable to power the indicator and (16) 350
ohm load cells. Use with option cards should be evaluated for total current draw.
CN1
CN2
1
2
3
4
3
2
1 +6V
GND
GND
−6V
±6VDC OUTPUT
DC INPUT
DC IN
GND
Figure 1. 6V DC-to-DC Power Supply Board
Use the following procedure to replace and install the DC to DC power supply in the 920i indicator.
Installation Notes
• AC-powered indicators retrofit with a DC power supply must also replace the indicator serial tag. Consult
factory for more information.
• The DC power supply fits the 25 Watt Power Supply bracket. The 65 Watt bracket used in the 920i Panel
Mount, Deep and Wall mount must be modified or replaced.
• DC power wiring to the indicator should be 18 AWG to 14 AWG for all conductors.
• For mobile applications, earth ground should be terminated to the vehicle chassis.
WARNING Disconnect power before removing indicator backplate
1. Place indicator face down on an antistatic work mat and remove screws that hold the backplate to the
enclosure body.
102528 November 2014