Emerson VISSION 20/20 service manual Description Type

Digital Input/Output

BOARD	I/O #	DESCRIPTION	TYPE
#
1	1	Compressor Start	OUTPUT
1	2	Oil Pump Start	OUTPUT
1	3	Capacity Increase	OUTPUT
1	4	Capacity Decrease	OUTPUT
1	5	Volume Increase	OUTPUT
1	6	Volume Decrease	OUTPUT
1	7	Oil Sump Heater	OUTPUT
1	8	Alarm	OUTPUT
2	9	Slide Valve Set point #1 (Economizer)	OUTPUT
2	10	Slide Valve Set point #2 (Hot Gas)	OUTPUT
2	11	Slide Valve Set point #3	OUTPUT
2	12	Slide Valve Set point #4	OUTPUT
2	13	Liquid Injection #1	OUTPUT
2	14	Liquid Injection #2	OUTPUT
2	15	Remote Enabled	OUTPUT
2	16	VRS Oil solenoid for old retrofit applications	OUTPUT
3	17	Comp Motor Starter Auxiliary Contact	INPUT
3	18	High Level Shutdown	INPUT
3	19	Oil Level Float Switch #1	INPUT
3	20	Oil Level Float Switch #2	INPUT
3	21	Remot Setpoint #1/#2 Selection	INPUT
3	22	Remote Start/Stop	INPUT
3	23	Remote Capacity Increase	INPUT
3	24	Remote Capacity Decrease	INPUT
4	25	Condenser Step #1	OUTPUT
4	26	Condenser Step #2	OUTPUT
4	27	Condenser Step #3	OUTPUT
4	28	Condenser Step #4	OUTPUT
4	29	Auxiliary Input #1	INPUT
4	30	Auxiliary Input #2	INPUT
4	31	Auxiliary Input #3	INPUT
4	32	Auxiliary Input #4	INPUT
5	33	Auxiliary Output #1	OUTPUT
5	34	Auxiliary Output #2	OUTPUT
5	35	Auxiliary Output #3	OUTPUT
5	36	Auxiliary Output #4	OUTPUT
5	37	Auxiliary Input #5	INPUT
5	38	Auxiliary Input #6	INPUT
5	39	Auxiliary Input #7	INPUT
5	40	Auxiliary Input #8	INPUT

COMPRESSOR START OUTPUT – When the Vission 20/20 signals the compressor to start, this output is energized. When the Vission 20/20 signals the compressor to stop, this output is de-energized.

OIL PUMP START OUTPUT - When the Vission 20/20 signals the oil pump to start, this output is energized. When the Vission 20/20 signals the oil pump to stop, this output is de-energized.

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