Table 11 - Cim Can Bus Termination Jumpers J5 - J8; Table 12 - Cim Serial Bit Rate Jumpers J9 - J11 - Keyscan CA250B Technical Instructions

CIM 1 to CIM n
CAN Bus Termination Jumpers - J5 to J8
The first and last modules on CAN Bus 1 and CAN Bus 2 must have the appropriate jumpers set to terminate
the bus. Terminating modules can be a CIM, CIM 0 or, if applicable, a CIM-Link.
Later, if additional CIMs are placed at either end of CAN Bus 1 or CAN Bus 2, be sure to reset the termination
jumpers accordingly.
CAN Bus 1
Module
First & last module (CIM or CIM 0)
All other modules
CAN Bus 2
Module
First & last module (CIM or CIM 0 or
CIM-Link)
All other modules
Serial Bit Rate Jumpers J9 – J11
The CIM has selectable serial bit rates. The jumper settings are outlined in the following table. Bit rates are
governed by CAN Bus 1 distances and RS-232 distances. Refer to the BPS Distance Chart. Set CIM jumpers to
match the ACU baud rate.
The Auto-match bit rate functions in the same manner irrespective of which ACU panel it is connected to or if it
is configured as CIM 0 or CIM (n). The CIM will detect and match the RS-232 bit rate with the ACU panel.
As an example, if configuring a system with five panels, set communication bit rates the same on all ACU
control boards, and then allow the CIM unit to auto-match the ACU bit rate. The CIM unit automatically sets
the CAN Bus bit rate to match. Keyscan recommends using the auto-match jumper setting.
Bit Rate/Second
Auto match ACU
9600
19,200
57,600
115,200
230,400
Keyscan Inc. – Technical Guide (PC109x - 04.15)
J4 0
Table 11 – CIM CAN Bus Termination Jumpers J5 – J8
Jumper #
J5 & J6
J5 & J6
Jumper #
J7 & J8
J7 & J8
Table 12 – CIM Serial Bit Rate Jumpers J9 – J11
Jumper #
J9 & J10 & J11
J9 & J10 & J11
J9 & J10 & J11
J9 & J10 & J11
J9 & J10 & J11
N/A
Jumper Setting Notes
Off = 0 / On = 1
1 1 Termination ON
0 0 Termination OFF
Jumper Setting Notes
Off = 0 / On = 1
1 1 Termination ON
0 0 Termination OFF
Jumper Settings
Off = 0 / On = 1
0 0 0
0 0 1
0 1 0
1 0 0
1 0 1
For future use – not supported on PC109x
69