Winco DGC-2020 - Manual (Page 119)

9400200990 Rev B DGC-2020 Installation 6-7
CAN Interface
These terminals provide communication using the SAE J1939 protocol or the MTU/MDEC protocol and
provide high-speed communication between the DGC-2020 and an ECU on an electronically controlled
engine. Connections between the ECU and DGC-2020 should be made with twisted-pair, shielded cable.
CAN interface terminals are listed in Table 6-10.
Table 6-10. CAN Interface Terminals
Terminal Description
48 (CAN L) CAN low connection
49 (CAN H) CAN high connection
50 (SHIELD) CAN drain connection
Dial-Out Modem
DGC-2020 controllers with style number xxxxxMxxx (US version) or xxxxxIxxx (international version) have
an internal modem with dial-in, dial-out capability. The DGC-2020 connects to a standard-device
telephone line through a USOC RJ-11C jack.
RDP-110 Connections
Terminals are provided for connection with the optional RDP-110 remote display panel. These terminals
provide dc operating power to the RDP-110 and enable communication between the DGC-2020 and
RDP-110. Twisted-pair conductors are recommended for connecting the communication terminals of the
DGC-2020 and RDP-110.
Table 6-11 lists the DGC-2020 terminals that connect to the RDP-110.
Table 6-11. RDP-110 Interface Terminals
Terminal Connects To:
4 (RDP BATT+) RDP-110 terminal 12/24
5 (RDP BATT–) RDP-110 terminal DC COM
6 (RDP TXD–) RDP-110 terminal 485–
7 (RDP TXD+) RDP-110 485+
Connections for Typical Applications
Connections for typical applications including 3-Phase Wye (Figure 6-3), 3-Phase Delta (Figure 6-4),
Single-Phase A-B (Figure 6-5), and Single-Phase A-C (Figure 6-6) are shown on the following pages.
NOTES
1.) If the DGC-2020 is providing one end of the J1939 backbone, a 120
Ω
terminating resistor should be installed across terminals 48 (CANL) and 49
(CANH).
2.) If the DGC-2020 is not part of the J1939 backbone, the stub connecting the
DGC-2020 to the backbone should not exceed 914 mm (3 ft) in length.
3.) The J1939 drain (shield) should be grounded at one point only. If grounded
elsewhere, do not connect the drain to the DGC-2020.