KLS Martin group marLED E3 - Pin Assignment of Cable Connection Terminal Block X3

Service Manual
Operating Lights marLED® E3, E9, E9i, E15, battery and
marLED® E3 on ceiling tube Ø 110 mm
Revision 2 33
Rules for setting the terminating resistor
•
The terminating resistor should be set to ON for the two CAN bus users farthest apart from each
other.
•
Only one terminating resistor may be switched on for each light. For marLED® E lights with surgiCam,
the marLED® terminating resistor must be switched off and only the terminating resistor of the
surgiCam daughterboard is switched on according to table, see section 6.4.4 “DIP switch SW1
surgiCam”, page 51.
•
The terminating resistor of a surgiCam COM interface must always be set to ON.
•
The terminating resistor of a marLED® COM interface may only be set to ON if no surgiCam COM
interface is included in the configuration.
•
The terminating resistor of the standard CAN board is normally set to OFF. In exceptional cases, e.g. if
long cables are used, point-to-point termination can be required (resistor switched on).
CAN bus malfunction
Once all devices are connected, the resistance between CAN
L and CAN H must range between 40 and
120
Ω to ensure perfect CAN bus functioning.
Long cables can additionally increase the measured resistance value.
•
Prior to each resistance measurement, make sure that the system is fully wired and off-circuit. If not,
the measured resistance value is useless.
6.1.7 Pin Assignment of Cable Connection Terminal Block X3
The terminal block X3 is used to connect a control panel whose RJ45 plug had to be cut off during the
mounting process (marTouch®, COM interface, wall box, wall control panel). Note that conductor cross-
sections must not be less than 0.3 mm
2
(AWG22) for proper connection.
The pin assignment of this terminal is identical for both CAN board types:
Pin Signal Cable color(s) TIA-568 B
1 PE -
2 VDC+ BU + BNWH
3 VDC- (light 1) BN + BUWH
4 CAN H 1 GNWH
5 CAN L 1 GN