Readings With Local Unit Disconnected - Baldwin Boxall OmniCare Installation Manual

C O M M U N I C A T I O N S
A.2.2 Readings with Local Unit Disconnected
A.2.3 Resistance Readings when using Repeaters
OmniCare issue 1
A more accurate reading can be obtained by disconnecting the
local unit and then measuring the resistance between the CANH
and CANL conductors.
Use the readings shown in Table A.3 to calculate the distance
when the Local Unit is disconnected.
Table A.3 — Resistance reading with Local Remote Unit Disconnected
50m 100m
1.0mm 151 152.8
1.5mm 150.4 151.6
2.5mm 150 150.7
When Repeaters have their jumpers fitted to increase the range,
the termination resistance is modified. The following tables
should be used to determine the approximate cable length.
Table A.4 — Resistance reading for 2 Repeaters with Jumpers Fitted
50m 100m
1.0mm 37.8 38.23
1.5mm 37.65 38.0
2.5mm 37.53 37.7
Table A.5 — Resistance reading from a Remote / Console or Repeater
without Jumpers Fitted to a Repeater with Jumpers Fitted
50m 100m
1.0mm 50.57 51.36
1.5mm 50.31 50.84
2.5mm 50.1 50.43
A more accurate reading can be obtained by disconnecting the
local unit and measuring between CANH and CANL.
Table A.6 — Readings for Distant Repeater with Jumpers Fitted
50m 100m
1.0mm 76.51 78.32
1.5mm 75.91 77.12
2.5mm 75.44 76.18
150m 200m 250m
154.6 156.4 158.2
152.8 154.0 155.2
151.4 152.16 152.9
150m 200m 250m
38.66 39.0 39.5
38.23 38.52 38.8
37.9 38.07 38.25
150m 200m 250m
52.13 52.9 53.64
51.36 51.88 52.39
50.75 51.07 51.39
150m 200m 250m
80.13 81.94 83.7
78.33 79.54 80.75
76.92 77.66 78.4
OmniCare EVC System
Installation & Commissioning Manual
300m
160
156.5
153.6
300m
39.9
39.1
38.42
300m
54.38
52.9
51.71
300m
85.56
81.96
79.14
89