Siemens 440 Terminal Designation Function, Control terminals of Micromaster

Issue 10/06 2 Electrical Installation

2.3Control terminals

Terminal	Designation	Function
1	–	Output +10 V
2	–	Output 0 V
3	ADC1+	Analog input 1 (+)
4	ADC1–	Analog input 1 (–)
5	DIN1	Digital input 1
6	DIN2	Digital input 2
7	DIN3	Digital input 3
8	DIN4	Digital input 4
9	–	Isolated output +24 V / max. 100 mA
10	ADC2+	Analog input 2 (+)
11	ADC2–	Analog input 2 (–)
12	DAC1+	Analog output 1 (+)
13	DAC1–	Analog output 1 (–)
14	PTCA	Connection for PTC / KTY84
15	PTCB	Connection for PTC / KTY84
16	DIN5	Digital input 5
17	DIN6	Digital input 6
18	DOUT1/NC	Digital output 1 / NC contact
19	DOUT1/NO	Digital output 1 / NO contact
20	DOUT1/COM	Digital output 1 / Changeover contact
21	DOUT2/NO	Digital output 2 / NO contact
22	DOUT2/COM	Digital output 2 / Changeover contact
23	DOUT3/NC	Digital output 3 / NC contact
24	DOUT3/NO	Digital output 3 / NO contact
25	DOUT3/COM	Digital output 3 / Changeover contact
26	DAC2+	Analog output 2 (+)
27	DAC2–	Analog output 2 (–)
28	–	Isolated output 0 V / max. 100 mA
29	P+	RS485 port
30	N–	RS485 port
Fig. 2-9	Control terminals of MICROMASTER 440

MICROMASTER 440	21
Operating Instructions (Compact)