Physical connections

The physical connections of the RTU-X depend on the model used: DIN or IP68.

Before connecting

Check the First Steps section for the supply voltage range supported by each model.

The wiring for each model is detailed below.

DIN Model

RTUX-DIN

Terminal	Description
1	VDC / L
2	VDC / L
3	GND / N
4	GND / N
5	12 VDC / 24 VDC output
6	GND
7	AIN0 / Analog input 0
8	AIN1 / Analog input 1
9	GND
		DIN	DOUT	AIN	RS-485	SDI-12	LATCH
10	Expansion 2	GND	COM	GND	RS485 B	N/C	OUT11+
11	Expansion 2	IN 11	OUT 11	AIN 5	RS485 A	Data	OUT11-
12	Expansion 2	IN 12	OUT 12	AIN 6	12 V	12 V	OUT12+
13	Expansion 2	IN 13	OUT 13	AIN 7	GND	GND	OUT12-
14	GND
		DIN	DOUT	AIN	RS-485	SDI-12	LATCH
15	Expansion 1	GND	COM	GND	RS485 B	N/C	OUT8+
16	Expansion 1	IN 8	OUT 8	AIN 2	RS485 A	Data	OUT8-
17	Expansion 1	IN 9	OUT 9	AIN 3	12 V	12 V	OUT9+
18	Expansion 1	IN 10	OUT 10	AIN 4	GND	GND	OUT9-
19	IN7 / Digital input 7
20	IN6 / Digital input 6
21	IN5 / Digital input 5
22	IN4 / Digital input 4
23	IN3 / Digital input 3
24	IN2 / Digital input 2
25	IN1 / Digital input 1
26	IN0 / Digital input 0
27	COMIN / Digital inputs common
28	OUT7 / Digital output 7
29	OUT6 / Digital output 6
30	OUT5 / Digital output 5
31	OUT4 / Digital output 4
32	OUT3 / Digital output 3
33	OUT2 / Digital output 2
34	OUT1 / Digital output 1
35	OUT0 / Digital output 0
36	COMOUT / Digital outputs common

IP68 Model

RTUX-IP68

C1 (Power supply)
Pin	Color	Description
1	Brown	VDC in VDC model / N in VAC model
3	Blue	GND in VDC model / L in VAC model
4	Black	Do not connect

C2 (Expansion 1)
Pin	Color	Expansion module
		DIN	DOUT	AIN	RS-485	SDI-12	LATCH
1	Brown	IN 10	OUT 10	AIN 4	GND	GND	OUT9+
2	White	IN 9	OUT 9	AIN 3	12 V	12 V	OUT9-
3	Blue	GND	COM	GND	RS485 B	N/C	OUT8+
4	Black	IN 8	OUT 8	AIN 2	RS485 A	Data	OUT8-

C3 (Expansion 2)
Pin	Color	Expansion module
		DIN	DOUT	AIN	RS-485	SDI-12	LATCH
1	Brown	IN 13	OUT 13	AIN 7	GND	GND	OUT12+
2	White	IN 12	OUT 12	AIN 6	12 V	12 V	OUT12-
3	Blue	GND	COM	GND	RS485 B	N/C	OUT11+
4	Black	IN 11	OUT 11	AIN 5	RS485 A	Data	OUT11-

C4 (I/O)
Pin	Color	Description
1	White	IN0 / Digital input 0
2	Brown	IN1 / Digital input 1
3	Green	OUT0 / Digital output 0
4	Yellow	COMOUT / Digital outputs common
5	Grey	AIN1 / Analog input 1
6	Pink	AIN0 / Analog input 0
7	Blue	12 VDC / 24 VDC output
8	Red	GND