DOT Matrix Displays
This section contains support articles regarding the DOT Matrix product line.
The products include the DHXXX, DVXXX, DM XXX, EHXXX, and the EVXXX.
A: There are several possible answers to this:
- The display may have lost power. If this is a discrete input display, verify that there is 110vac present on the 2 outside terminals of the JP1 connector. If this is a Microcomm® input display, verify that there is approximately +24vdc present between terminals 1 & 2 on the J2 connector.
- If the display has power, then it may be due to the presence of an incorrect input signal. Verify that only the current floor signal is active.
- The problem could be caused by incorrect programming of the display. Please contact CE Electronics technical support with the SN# from the white label that is typically found on the side of the transformer so we can determine how the display was programmed.
A: There are a couple of possible answers to this.
- Make sure the up and down direction signals have the correct voltage connected to the WHT/RED and ORG/RED wires in the wiring harness.
- The up and down arrows must be programmed into the display along with the floors. Please contact CE Electronics technical support with the SN# from the white label that is typically found on the side of the transformer so we can determine if the arrows were included in the program.
A: This normally means that the dot matrix display is either getting no floor signals or the signals are the wrong voltage and/or polarity.
- If you have a DHXXX or DVXXX display, the value of the R1 – R8 resistors will determine the signal voltage it is expecting. For 6 to 20 VAC/DC the value will be 820Ω (grey, red, brown, gold); for 24VAC/DC the value will be 6.8KΩ (blue, grey, red, gold); for 120VAC the value will be 18KΩ (brown, grey, orange, gold); and for 125VDC the value will be 39KΩ (orange, white, orange, gold). The DH/DV displays are polarity sensitive, so ensure that the BLU/RED and RED/GRN wires have been connected to the correct return for the floor signals.
If your signal voltage is DC and you have the wrong polarity board, you will need to contact someone in our sales department and order a new board that is set up for the correct polarity.