auto maskin DCU 305 R3 LT, Installation Manual

Page: 18 / 44

Page 18 (44)
RK-66 terminal number
Analogue
Channel
+24V supply to
sensor
Analogue input
1 19 20
2 21 22
3 23 24
4
25 26
5 27 28
Analogue Input Channels and the corresponding wire
terminal number on RK-66
Terminal 19, 21, 23, 25 and 27 are all +24V supply outputs . These
outputs are fused with a common, internal, automatic fuse (F3). The
fuse is located on the RK-66 card.
The fuse will automatically reset when the overload or short circuit is
removed. An alarm is given if the fuse blows and the alarm stays
activated as long as the short circuit is present.
For fuse sizes and characteristics, please see page 21.
Example:
Analogue channel 1 might be the Oil Pressure sensor. The
sensor is then connected between terminal 19 (+24V supply) and
terminal 20 (4-20mA input).
J1939 CAN connections
The CAN bus cable
The CAN bus is a high speed data transmission network and requires
more from the cable installation than many other signal types.
The bus consists of two wires: CAN_H and CAN_L. Between units,
these wires should be connected CAN_H to CAN_H and CAN_L to
CAN_L, ie they should
not be crossed.
Maximum cable length for the entire cable is 250m (820 feet).
The cable must be a twisted pair with shield. Minimum wire thickness
is 0.5mm^2 (20AWG) and maximum wire thickness is 0.8mm^2
(18AWG). The cable should be certified for CAN/J1939 use.
Minimum cable curve is 8x the cable diameter (ie it should not be
bent too sharp). It must not be deformed in any way.
On the DCU 305 R3 port P10, CAN_H is pin 7 and CAN_L is pin 2.
No other pins should be connected. The shield should normally be
connected at one end only, but in certain installations with a long
cable it may be favorable to connect it at both ends.