Horner APG QX651 OCS - Manual (Page 23)

MAN0798-04-EN CH. 5
August 20, 2009 Page 23 of 95 ECN # 979
CHAPTER 5: CAN COMMUNICATIONS
Note: See the latest edition of Horner’s CAN Networks Manual (MAN0799) by referring to our website
(page 92).
5.1 Overview
QX models with either a BP41 or BP43 attached provide a CAN networking port, which is implemented
with a 5-pin connector, labeled CsCAN.
Like the MJ1 serial port, the CsCAN port can be used for QX BPxx programming by connecting it to the
CAN port of a PC running Cscape. The CsCAN port also allows the QX BPxx to exchange global data
with other OCS/RCS controllers and to access remote Network I/O devices (SmartStix Modules).
5.2 Port
Description
The QX BPxx CsCAN port implements the ISO 11898-2 physical layer and the CAN 2.0A data link layer
standards. Also, since the CsCAN port is powered by an internal isolated power supply, external CAN
power is not required.
5.3 Wiring
This section shows how the CsCAN port pins are assigned.
Figure 5-1 – CsCAN Port Connector
Table 5.1 – CsCAN Port Pin Assignments
Pin Signal Signal Description Direction
1 V- CAN Ground
−
2 CN_L CAN Data Low In/Out
3 SHLD Shield Ground
−
4 CN_H CAN Data High In/Out
5 NC No Connect
−
Note: The V+ connection is
not required on the QX BPxx.
The QX BPxx network port is
self-powered. However,
supporting devices can
require this connection, and
this pin can be used to land
the extra wire required for
those devices.