nVent RAYCHEM RMM3 Bedienungsanleitung Seite 6
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The RMM3 has two sets of terminals for connections to the
EN
RS-485 bus. One terminal block allows the RMM3 to connect
to the RS-485 bus, the second allows a continuation of the bus
DE
to other RMM3 units on the network. Observe polarity, which is
indicated on the RMM3. Connect the incoming RS-485 bus to the
FR
set of terminals marked "IN", observing the polarity noted on the
cover of the RMM3 use the terminal marked "S" for the shield of
RU
the RS-485 cable. Connect the continuation of the RS-485 bus
to the set of terminals marked "OUT" in the same manner (not
required for the last RMM3 in the network).
Important: Do not connect the shield of the RS-485 cables to the
enclosure's grounding terminal. Connect the shield only to the
RMM3 terminals provided. To avoid the potential for spurious
ground loops, the RS-485 cable shield should be connected to
ground only in the nVent RAYCHEM unit. For the last RMM3 in the
network, terminate the RS-485 bus by removing the shorting block
on jumper location J17 from 2–3 and placing it across pins 1–2.
Decimal Modbus address versus Hexadecimal dial settings on RMM3
Decimal
Hex
High, Low
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
6
nVent.com/RAYCHEM
Decimal
Hex
High, Low
1
26
1A
2
27
1B
3
28
1C
4
29
1D
5
30
1E
6
31
1F
7
32
20
8
33
21
9
34
22
0A
35
23
0B
36
24
0C
37
25
0D
38
26
0E
39
27
0F
40
28
10
41
29
11
42
2A
12
43
2B
13
44
2C
14
45
2D
15
46
2E
16
47
2F
17
48
30
18
49
31
19
50
32
Decimal
Hex
Decimal
High, Low
51
33
76
52
34
77
53
35
78
54
36
79
55
37
80
56
38
81
57
39
82
58
3A
83
59
3B
84
60
3C
85
61
3D
86
62
3E
87
63
3F
88
64
40
89
65
41
90
66
42
91
67
43
92
68
44
93
69
45
94
70
46
95
71
47
96
72
48
97
73
49
98
74
4A
99
75
4B
100
OR
NGC-30 via UIT2
NGC-40 via Bridge module
Hex
Decimal
High, Low
4C
101
4D
102
4E
103
4F
104
50
105
51
106
52
107
53
108
54
109
55
110
56
111
57
112
58
113
59
114
5A
115
5B
116
5C
117
5D
118
5E
119
5F
120
60
121
61
122
62
123
63
124
64
125
Hex
High, Low
65
66
67
68
69
6A
6B
6C
6D
6E
6F
70
71
72
73
74
75
76
77
78
79
7A
7B
7C
7D
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