Emerson 20/20 service manual Analog Inputs 2, Digital I/O Board Layout

Section 3 • Hardware Architecture

Table 3-2. Analog Inputs (2 of 2)

Board

I/O #

Description

Type

9	28	Auxiliary #12	0-5V, 1-5 V, 0-10V, 4-20 mA, RTD, ICTD
9	29	Auxiliary #13	0-5V, 1-5 V, 0-10V, 4-20 mA, RTD, ICTD
9	30	Auxiliary #14	0-5V, 1-5 V, 0-10V, 4-20 mA, RTD, ICTD
9	31	Auxiliary #15	0-5V, 1-5 V, 0-10V, 4-20 mA, RTD, ICTD
9	32	Auxiliary #16	0-5V, 1-5 V, 0-10V, 4-20 mA, RTD, ICTD

Table 3-3. Analog Outputs

Board

I/O #

Description

Type

10	1	Compressor VFD	4-20 mA
10	2	Condenser VFD	4-20 mA
10	3	% Slide Valve Position	4-20 mA
10	4	Motorized Valve (Cool Compression or Liquid	4-20 mA
		Injection), V+
10	5	Spare / Unused	4-20 mA
10	6	Spare / Unused	4-20 mA
10	7	Spare / Unused	4-20 mA
10	8	Spare / Unused	4-20 mA

Figure 3-2. Digital I/O Board Layout

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