Matrix-orbital VFD2041 User Manual download pdf (Page 16)

WARNING Do not apply voltage through pin 9 of the DB-9 connector

AND through the Power/Data Connector at the same time.

2.2 Power/Data Connector

ThePower/Data Connector providesa standard connectorforpoweringthe display module. The VFD2041

requires ﬁve volts for the standard display module, between nine to ﬁfteen for the wide voltage (V) and be-

tween nine to thirty-ﬁve volts for the wide voltage with efﬁcient power supply module (VPT). The voltage is

applied through pins one and four of the four pin Power/Data connector. Pins two and three are reserved for

serial transmission, using either the RS-232/TTL or the I

C protocol, depending on what has been selected

by the Protocol Select Jumpers. Pins two and three may be reversed by changing the Legacy Connector

Jumpers in order to be compatible with previous PCB revisions.

Pin 1 PWR (See table 1)

2 Rx \ SCL (I

C clock)

3 Tx \ SDA (I

C data)

4 GND

Figure 16: Power Connector and Pin out

Table 1: Power Requirements

Standard -V -VPT

Supply Voltage +5Vdc ±0.25V +9V to +15V +9V to +35V

Supply Current 10 mA typical

Supply Backlight Current 57 mA typical

WARNINGS

• Do not apply any power with reversed polarization.

• Do not apply any voltage other than the speciﬁed voltage.

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Matrix-orbital VFD2041 User Manual Page 16