326 9440500990 Rev D
Analog Expansion Module DECS-250N
External RTD Input Connections
External 2-wire RTD input connections are shown in Figure 172. Figure 173 shows external 3-wire RTD
input connections.
Figure 172. External Two-Wire RTD Input Connections
Figure 173. External Three-Wire RTD Input Connections
CAN Bus Interface
These terminals provide communication using the SAE J1939 protocol and provide high-speed
communication between the Analog Expansion Module and the DECS-250N. Connections between the
AEM-2020 and DECS-250N should be made with twisted-pair, shielded cable. CAN Bus interface
terminals are listed in Table 44. Refer to Figure 174 and Figure 175.
Table 44. CAN Bus Interface Terminals
P1- HI (CAN H) CAN high connection (yellow wire)
CAN low connection (green wire)
RTD1+
RTD1–
RTD1C
AEM-2020
Jumper
P0053-64
BLACK
RED
RTD1+
RTD1–
RTD1C
AEM-2020
P0053-65
RED
BLACK
BLACK
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