SERIAL PORT PIN OUTS & SERIAL CABLE WIRING

CAUTION:  Regulated voltage is brought to the serial output receptacle on the older-model ULTIMETER 2000 and 500 (1998 and earlier).  The regulator is likely to be damaged if you accidentally reverse the sequence of serial cable wires.  On newer models, no damage will occur, but the weather station will not function.  If you plan to make a serial interface cable, we urge you to take the following steps to avoid malfunction and possible damage when wiring a modular/DB-9 or modular/DB-25 adapter:

MODEL 2100, 800 PIN # AND FUNCTION		MODEL 100 PIN # AND FUNCTION		MODEL II PIN # AND FUNCTION		DB-9 to COMPUTER	DB-25 to COMPUTER	DB-9 to TNC	DB-25 to TNC
1	SPECIAL	1	SPECIAL	-	-	-	-	-	-
2	+5 VOLTS	2	+5 VOLTS	1	N/C	-	-	-	-
3	OUTPUT	3	OUTPUT	2	OUTPUT	PIN 2	PIN 3	PIN 3	PIN 2
4	HUMIDITY	4	N/C	3	N/C	-	-	-	-
5	GROUND	5	GROUND	4	GROUND	PIN 5	PIN 7	PIN 5	PIN 7
6	INPUT	6	INPUT	-	-	PIN 3	PIN 2	PIN 2	PIN 3
MODULAR PHONE RECEPTACLE PINS ARE LABELED FROM LEFT TO RIGHT, LOOKING INTO THE FEMALE RECEPTACLE WITH THE RELEASE CLIP ON THE TOP.

"Keep a weather eye on Peet Bros."