Sevcon Gen4, Applications Reference Manual, Page: 40 / 123

Doc. # 177/52701
Rev3
3-16
Pin Name Type What to connect Maximum
rating Comment
10
Size 2
(and later
size 4)
models:
5V supply
output
Power 5Vsupply output I = 100mA.
V = 5V
This output can be used to
power transducers or similar
devices at 5V and up to
100mA.
Size 4 & 6
models:
Key switch
input
Power
From ‘dead’ side of key
switch via suitable fuse
7A
(Total of all
contactor
output
currents plus
1.0A) This input supplies power
from the battery for all the
logic circuits.
The unit cannot operate
without “Key switch in”
supply.
Pins 1, 6 and 10 are
connected together
internally and can be used
individually or in parallel.
11 Contactor
out 3 Out To the switched low
side of contactor or
valve coil.
(DO NOT USE WITH
CAPACITIVE LOADS).
2.0A per
output,
subject to a
limit of 6A for
the total of
all the
outputs.
V = Vb This output provides low
side voltage or current
control to the load
depending on configuration.
The output goes low or is
chopped to activate the
load. It goes high (to Vb) to
de-activate the load.
12 Output 3
Power To one end (high side)
of a contactor to be
controlled by Contactor
out 3 2A
This output feeds power to
the contactors. The output is
at battery voltage.
13 CAN High Comms CANbus High signal V = 5 V Maximum bus speed 1
Mbits/sec
Alternative connection to pin
16
14 Encoder A
Input Digital
pulse From the speed
encoder A channel I = 25 mA
(internally
limited)
V = 8 V (for
current-
source
encoders)
V = 2.5V or
5V (for open-
collector
encoders)
Check the speed encoder
signals have the correct
number of pulses per
revolution.
Check Gen4 is configured
for the type of encoder you
are using (open-collector or
current-source)