Rice Lake RD-300 Remote Display - Manual (Page 6)

4 RD-300/RD-232 Installation & Operation Manual
2.2 Electrical Service Connections
2.2.1 All Models - AC - Service
You will need a source of 117 VAC ± 10% 60 Hz. 1 Phase to power the RD-300/RD-232. The standard unit has
an 8' #18-3 AWG polarized line cord. This can be plugged into a standard duplex receptacle if the
RD-300/RD-232 is used in a dry area. If the environment around the RD-300/RD-232 is wet or dirty, use a “Bell
Box” or other gasketed receptacle or hard wire the AC directly to the RD-300/RD232. The cord grip furnished is
mounted in a hole suitable for 3/8" NPT fittings.
If you hard wire power to the RD-300/RD-232, you will use the three position connector marked TB-1(shown in
Figure 2-2). Connect the L1 (Black or Hot) wire to terminal #1, the right hand terminal nearest the fuse. Strip the
wire approximately 3/16". Use a small screw driver or ball point pin to press the white latch release. While
holding the lever down, insert the wire and release the lever. Pull on the wire to assure a good connection. You
must use #14 AWG or smaller wire. Strip and insert the L2 (white or neutral) wire into TB1-3. Pull on the wire to
assure a good connection. Strip and insert the ground (green) wire into TB1-2. Pull on the wire to assure a good
connection.
Figure 2-2. AC Power on Input TB1
To prevent injury or product damage, do not turn on the power yet. Wait until you have successfully worked
through this manual and reached the section Powering Up the RD-300.
2.2.2 DC Models Voltages 6.2 - 18 VDC
The RD-300/RD-232 will also work on DC power. To use a DC power source between 10 and 18 VDC, connect
the + DC source to terminal TB2-1 and the DC- source to terminal TB2-2 as shown in Figure 2-3. The current
requirement is 30 mA without the backlight option and 160 mA with the LED backlight. If the unit has no
backlight installed, then it will work with voltages of 6.6-24 VDC without modification. If the optional backlight
is installed on the RD-300, the operating voltage range is 8.2 to 18 VDC without modification. Consult the
factory for other voltages.
Figure 2-3. DC Voltage Settings
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