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Workstations Installation
ES6 Keyboard Connections
CAN
Termination resistor is selectable by jumper. Both ends of the CAN network must be
terminated with 120 ohm resistor.
Node number is selectable 0–7 by jumpers (Configuration switch).
Node number 0 is considered master node, and must be selected for the keyboard
connected to PC by PS/2 or USB. This must be true even if only one node exists.
Information received by the master from the PC is sent out on the CAN-bus, and
slave units will act accordingly (indicators on/off etc.). Information received by
the master from the CAN-bus will be transferred to the PC if there is no risk for
misinterpretation (e.g. if any key is down, no keys on other keyboards may be sent
to PC).
Units with node numbers 1–7 are considered peripheral (slave) units.
Data from the keyboard and PS/2 device port is transferred to the CAN-bus. Data
from the CAN-bus (regarding indicators, background light etc.) is received and
action is taken.
Fig. 2. ES6 keyboard. View of 24 VDC and CAN connectors
RS232
Data from the PC received by the master will be transferred to the CAN-bus and
also handled locally.
Data regarding function keys and encoders will be sent to the CAN-bus by slaves
and to the RS232 port by the master.
PS/2 Device Ports
The keyboard may connect to an external pointing device (e.g. trackball or joystick)
by a PS/2 port.
Data received on this port will be transferred to the PS/2 mouse port connected to
the PC if node number 0 is set or to the CAN-bus if node number 1–7 is set. If node
number 0 is set but no PC is connected to the PS/2 mouse port, data will be
transferred via the USB port if PC connection is established.
Chapter 1. Hardware Installation
13
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