B-TEK Scales LLC 8-inch LED Red / Green Traffic Signal Instruction Manual
- June 3, 2024
- B-TEK Scales LLC
Table of Contents
B-TEK Scales LLC 8-inch LED Red / Green Traffic Signal
Instruction
There are 4 options for controlling the stop and go light.
Options 1, 2, and 3 use jumper J51 to select the desired voltage used by the
switches (switches can be interchanged with photoeyes or other relays). When a
simple closed contact switch is used, either 5 volts or 12 volts is
acceptable. Select 5 volts for TTL systems or 5 volt relays. Select 12 volts
for 12 volt relays or photoeyes.
Option 1: Single Switch
Set Blue jumper on JP5 to 1 Switch
Connect any closed contact switch (SPST) between GREEN and GND on J2. Light is
Green when switch is open and red when switch is closed (reversed when invert
jumper is selected)
Option 2: Dual Switches
Set Blue jumper on JP5 to 2 Switches
Connect two SPST switches or a DPTT(DP3T) switch between GREEN, GND and RED on
J2. Lights are normally on. When contact is made between GND and GREEN the
green light turns off. When contact is made between GND and RED the red light
turns off. When Invert jumper is on lights are normally off and any GND
connection turns the corresponding light on.
Option 3: Proximity Detector
Set Blue jumper on JP5 to Proximity. Switches are typically 12 volt photoeyes
When 2 normally open switches are open (or 2 normally closed switches are
closed when the invert jumper is selected) the GREEN light is on
When one switch is open and the other is closed the RED light is on When 2
normally open switches are closed (or 2 normally closed switches are open when
the invert jumper is selected) the RED light flashes. Flashing speed is based
upon the lower 4 jumper selections on JP5. For example the jumper selection of
[2400] 3/4 sec) will cause the green light to remain on for 3/4 of a second
and then off for 3/4 of a second, then repeat every 1.5 seconds as long as
both switches remain in the same state.
Option 4: Serial Data
Set Blue jumper on JP5 to RS232/422/485 or to CLOOP depending on desired input
Set Blue jumper on JP5 to desired baud rate 1200, 2400, 4800, or 9600.
Wiring
- RS232
- Transmitting Device SG
- TXD — RXD
- GND — GND
- RS422/485
- Transmitting Device SG
- 422A(+) — RX422A
- 422B(-) — RX422B
- Current Loop
- Transmitting Device SG
- +20 mA — CL(+)
- -20 mA — CL(-)
The lights are controlled by 1 of 4 ASCII characters. If the character is
anywhere in the data stream the corresponding lights turn on/off, the lights
will remain in that state until one of the other 3 characters is received.
ASCII “R” 0x52 turns the red light on and the green light
off. ASCII “G” 0x47 turns the green light on and the red
light off. ASCII “O” 0x4F turns both lights off.
ASCII “B” 0x42 turns both lights on.
Note if a continuous data stream contains a “G” for gross the light will always be green.
Mounting Dimensions
The mounting bracket has four holes for ¼ inch bolts. Mounting holes are 4 inches apart in width and 3 inches apart in height.
3.5in Hardware and Jumper Settings
Looking at the front face of the SG, the board should be inserted with the
communication terminal strip in the top right corner of the case (Red box) and
the switch connection terminal on the bottom right closest to the cable entry
points. (Green box)
The terminal strip should be on the front side of the board with the
connection opening facing outward.
The Input Method selection jumpers will be located on the Front side of the
board in the Top right corner. (Blue box)
From the factory, the jumpers should be set for: 1 switch, Invert, and 1200
baud rate.
Out of the box, when the display is powered on, the red light should be lit.
The Serial Number will be on front side of the board in the lower left
section.
(Yellow box) 
8” Hardware and Jumper Settings
Looking at the front face of the SG8, the board should be inserted with the
communication (RED box) and switch connection terminal strip (GREEN box) in
the bottom right corner of the case, closest to the cable entry points.
The terminal strip should be on the back side of the board with the connection
opening facing outward.
The Input Method selection jumpers will be located on the back side of the
board in the bottom right corner. (Blue box)
From the factory, the jumpers should be set for: 1 switch, Invert, and 1200
baud rate.
Out of the box, when the display is powered on, the red light should be lit.
The Serial Number will be on back side of the board, along the bottom edge, in
the middle section.
(Yellow box) 
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