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3.5.2.5
DIP Switches and Addressing
Each MRS-485 (and the partner gas detector) must be configured to a unique address. If there are 10 detectors on the serial line, then
10 unique addresses must be used, one for each detector. To set the address, use the eight DIP switch positions. For each unit choose
the value from 13 to 99 (see chart) and set the eight switches to match the address. UP means ON or 1 and DOWN means OFF or 0.
For example, to configure a unit as address "50", set switches "2, 5, 6" (see table) to ON or in the up position (01001100). See page 11
for a list of applicable addresses and dip-switch settings.
13 = 1, 3, 4
14 = 2, 3, 4
15 = 1, 2, 3, 4
16 = 5
17 = 1, 5
18 = 2, 5
19 = 1, 2, 5
20 = 3, 5
21 = 1, 3, 5
22 = 2, 3, 5
23 = 1, 2, 3, 5
24 = 4, 5
25 = 1, 4, 5
26 = 2, 4, 5
27 = 1, 2, 4, 5
28 = 3, 4, 5
29 = 1, 3, 4, 5
3.5.2.6
Normal MRS-485 Operation
The MRS-485 will monitor the 4-20 mA current output of the detector. At power up and during its warm-up period, the 6-Series detector
will communicate its sensor type over the 4-20 current output using a custom protocol. The MRS-485 will automatically register each 6-
Series detector as it is programmed with information about all the detectors to which it can be connected. The MRS-485 will use this
information to determine the gas level sensed by the 6-Series detector by measuring the 4-20 mA current-loop output during normal
operation of the detector.
• When the LED is solid GREEN, the operation is normal, the MRS-485 knows the detector type, no errors are
detected and no MODBUS data are being received or transmitted over the RS-485 line.
• When the LED is GREEN with random bursts of AMBER, the operation is normal and now data are being received
or transmitted over the RS-485 line. The AMBER LED will come on anytime that there is data traffic
30 = 2, 3, 4, 5
31 = 1, 2, 3, 4, 5
32 = 6
33 = 1, 6
34 = 2, 6
35 = 1, 2, 6
36 = 3, 6
37 = 1, 3, 6
38 = 2, 3, 6
39 = 1, 2, 3, 6
40 = 4, 6
41 = 1, 4, 6
42 = 2, 4, 6
43 = 1, 2, 4, 6
44 = 3, 4, 6,
45 = 1, 3, 4, 6
46 = 2, 3, 4, 6
47 = 1, 2, 3, 4, 6
48 = 5, 6
49 = 1, 5, 6
50 = 2, 5, 6
51 = 1, 2, 5, 6
52 = 3, 5, 6
53 = 1, 3, 5, 6
54 = 2, 3, 5, 6
55 = 1, 2, 3, 5, 6
56 = 4, 5, 6
57 = 1, 4, 5, 6
58 = 2, 4, 5, 6
59 = 1, 2, 4, 5, 6
60 = 3, 4, 5, 6
61 = 1, 3, 4, 5, 6
62 = 2, 3, 4, 5, 6
63 = 1, 2, 3, 4, 5, 6
17
64 = 7
65 = 1, 7
66 = 2, 7
67 = 1, 2, 7
68 = 3, 7
69 = 1, 3, 7
70 = 2, 3, 7
71 = 1, 2, 3, 7
72 = 4, 7
73 = 1, 4, 7
74 = 2, 4, 7
75 = 1, 2, 4, 7
76 = 3, 4, 7
77 = 1, 3, 4, 7
78 = 2, 3, 4, 7
79 = 1, 3, 4, 7
80 = 5, 7
83 = 1, 2, 5, 7
84 = 3, 5, 7
85 = 1, 3, 5, 7
86 = 2, 3, 5, 7
87 = 1, 2, 3, 5, 7
88 = 4, 5, 7
89 = 1, 4, 5, 7
90 = 2, 4, 5, 7
91 = 1, 2, 4, 5, 7
92 = 3, 4, 5, 7
93 = 1, 3, 4, 5, 7
94 = 2, 3, 4, 5, 7
95 = 1, 2, 3, 4, 5, 7
96 = 6, 7
97 = 1, 6, 7
98 = 2, 6, 7
99 = 1, 2, 6, 7
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