8
FP-1300 Quick Start Guide
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Terminating the CAN Network
If you connect the FP-1300 to a multiple-device CAN network that is already terminated, go to
the
Wire Power to the FieldPoint System section next. If you connect the FP-1300 to a single-
device CAN network, you need to terminate the network. To terminate the CAN network, follow
these steps:
A. Install a 120
Ω
resistor between the C_H and C_L terminals on the FP-1300. The typical
resistance is 120
Ω
. The maximum resistance is 130
Ω
. The minimum allowable resistance
is 100
Ω
.
B. Install another 120
Ω
resistor at the other end of the CAN cable between the C_H and C_L
terminals.
When you terminate the CAN network, the effective resistance between C_H and C_L is 60
Ω
.
N
N
N
NO
O
O
OTT
T
TEE
E
E
The Combicon-style connector and the CAN cable must have a nominal
impedance of 120
Ω
. For more information, refer to ISO 11898-2.
