Teledyne LeCroy CANbus TD and CANbus TDM - Operators Manual - Manual (Page 51)

Operator's Manual
CANbus-TD-TDM-OM-E RevB
51
Accessories
Various accessories are also available to use with the CANbus TD. These are listed below:

Trigger Couplers – Trigger Couplers are CAN Transceivers. The Trigger Coupler in the
Trigger Module must match the CAN transceiver in the circuit that you are connecting the
Trigger Module to. Trigger Couplers can be easily interchanged in the Trigger Module as
the need requires. The following Trigger Couplers are available from LeCroy:
o CAN 251 High-speed (Included with Trigger Module)
o CAN 1050 High-speed
o CAN 1041 High-speed (Wake-Up)
o CAN 1054 Low-speed
o CAN 5790c Single-Wire
All Trigger Couplers are optically isolated and feature optical decoupling between the
CANbus TD Trigger Module and the CAN Bus. Galvanic isolation of the transceiver
voltage supply is realized using a DC/DC converter.
Note: ISO 11992-1 prescribes at least a 16 V voltage supply (VS) for 24 V systems. Therefore, it
is required to use the TC 10011OPTO Trigger Coupler with an external voltage supply. This
voltage supply should be between 16 V and 36 V, and applied to pin 9. No other trigger
couplers require an external voltage supply.

Cables – A variety of connection cable sets for high-speed and low-speed CAN are
available. These cable sets provide all that is needed to connect to 9-pin terminated CAN
in many situations. In addition, a low-speed Y-connection cable is also available, which
makes it easy to connect to a third-party CAN simulation or analysis tool, such as Vector’s
CANalyzer or CANoe.
Connecting to a CANbus Circuit
Overview
The CANbus TD/TDM Trigger Module operates as a “node” on the CAN Bus. It contains a
Microcontroller, CAN controller, and Transceiver (Trigger Coupler) and interfaces to the CAN
circuit just like any other node on the bus. However, the Trigger Module only provides triggering
capability. In order to “view” the actual CAN physical signal on the oscilloscope display, you
must also probe the CANH and CANL signals with single-ended probes, or a differential probe
(such as the LeCroy ADP305 or AP033) and input this probe signal(s) to an oscilloscope channel.