IMD 100 Integration manual 4189360015 Rev. G
Electrical HW connections and requirements
Page 46 of 243
Terminal no.
Terminal text
Description
5
-
Optional shielding terminal
containing the following
circuit inside the IMD:
7
CAN-H
CAN high
8
CAN-T2
CAN termination resistor T2
5.4.1.1 Cable requirement
It is required that shielded cables with twisted pairs are used for the CAN connections. Cables
designed for CAN bus communication according to ISO 11898 are recommended. Two pairs or one
cord and a twisted pair must be used. CAN H and CAN L must always be a twisted pair. See also
section
5.4.1.2 Connector housing requirements
Use metal or metalized 9 pole female D-sub housing. All shields must be connected to the connector
housing.
5.5
Connecting 24V, digital and safety I/O (X7, X8, X9)
X7, X8, and X9 are implemented as a male-female connector with the male part on the IMD and the
wires are connected to the female part. All female parts are delivered with the IMD.
Info
In some cases, it is possible to use the CAN connections without common ground, and
thus use a shielded 2 wire cable for units in different cabinets. However, without common
GND the communication might get unstable, and it is not possible to predict beforehand
whether it will happen or not. DEIF recommends to use cables that have either an extra
twisted pair or an extra inner shield in order to be able to connect the common GND
between the units.
100n
1M