CABLING REQUIREMENTS.
USING THE 485RPT MODULE TO SPLIT THE MAIN DATA HIGHWAY
All resistors
120 Ohms
In some circumstances more than one data highway may be required as well as a host Modbus
connection. This can be achieved by fitting 485RPT modules to the main highway port. If this is
to be implemented then one 485RPT module will be required per extra highway. The Tocsin 700
operates in the normal manner but it should be noted that there is still a limitation of 32 devices.
+24V DC
B
A
GND
+24V DC
B
A
GND
+24V DC
B
A
GND
ZERO
ZERO
F
AUL
T
F
AUL
T
CAL
CAL
360
360
CHASS
CHASS
24V DC
24V DC
B
B
A
A
GND
GND
mA
mA
P
P
Y
Y
W
W
Common
Common
Active
Active
Compensator
Compensator
ZERO
ZERO
F
AUL
T
F
AUL
T
CAL
CAL
360
360
CHASS
CHASS
24V DC
24V DC
B
B
A
A
GND
GND
mA
mA
P
P
Y
Y
W
W
Common
Common
Active
Active
Compensator
Compensator
ZERO
ZERO
F
AUL
T
F
AUL
T
CAL
CAL
360
360
CHASS
CHASS
24V DC
24V DC
B
B
A
A
GND
GND
mA
mA
P
P
Y
Y
W
W
mA+
mA+
360
360
CONC
CONC
0V
0V
mA-
mA-
Common
Common
Active
Active
Compensator
Compensator
mA+
mA+
360
360
CONC
CONC
0V
0V
mA-
mA-
mA+
mA+
360
360
CONC
CONC
0V
0V
mA-
mA-
Tocsin 700+ Control Panel
G
K
H
L
J
M
D
A
E
B
F
C
485RPT
G
K
H
L
J
M
D
A
E
B
F
C
485RPT
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