West Control Solutions KS 800 Operating Instructions - Manual (Page 29)

Multi-Temperature-Controller KS 800
8.3 Terminating resistors
Hints related to baudrates, bus lengths, properties of electrical cables and mutual effects are given
in the relevant interface descriptions.
All KS 800 versions are delivered without terminating resistors at the bus connectors which must be
plugged into the free bus connector of the last unit.
The resistors required for each bus must be added externally to the last unit at both ends of the bus
cable. Eihter in the last connector (socket) or in a separate terminating connector (socket), which
must be plugged into the free bus connector of the last unit.
The standards or standard drafts of the relevant bus system are applicable
RS485/422: Unlike the other bus cables, these cables are not standardized. Therefore, no general
data on terminating resistors can be provided. The wave resistance is dependent of cable type and
length. Follow the guidelines provided by the cable manufacturers and connect the terminating
resistors across lines A and B of the relevant conductor pairs TXD and RXD (values approx.
100...200
Ω
).
CAN bus (Canopen and DeviceNet): 9-pole sub-D socket with terminating resistor. Only ter-
minating resistor, not suitable for connecting a cable. PMA order no. 9407 800 90021
DeviceNet: The 120
Ω
; 5%; 0,25W terminating resistor must be connected to the unused terminals
of the DeviceNet connector across connections blue (BU) and white (WH) (see also drawing, sec-
tion 8.2.2).
PROFIBUS: e.g. Siemens, bus connector, types 6ES7972-OBB10-OXAO or
6ES7972-OBB20-OXAO, or 6GK1 500-OEAOO. This connector is not available from PMA.
9 Indicator LEDs
9.1 Outputs
Below the outputs, 16 indicator LEDs indicate the output status, provided that a definition is given
for all outputs.
If inputs 13 ... 16 are defined as inputs, the indicator LEDs are lit with a high signal applied to the
inputs.
9.2 PWR, COM and alarm indicator LED
Above the input terminals, five other LEDs with the following signification are fitted:
PWR This LED is lit with the supply voltage applied.
COM With CAN_BUS (CANopen and DeviceNet) and RS422/485, this LED
indicates data transmission between KS800 and control system (PC or
visualization) by blinking.
With PROFIBUS, this Led indicates the bus statuses.
LED off: error signalling for "no bus access" (so far not addressed by master)
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