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Operator Manual
Issue 1
TIL – Eng – Spec – 080
Page 50 of 70
SeaHub
Output
Description
Jumper Settings
Power Limit
+5V
5V Output, isolated from
communication signals only
+5V
PWR GND +
GND
Not to exceed
10W (2A)
+5V
5V Output, with no isolation
+5V
PWR GND +
GND +
COMMS GND
Not to exceed
10W (2A)
COMMS
+5V
Communication 5V supply,
isolated from all signals apart
from communication signals.
Useful for low power
consummation peripheral
connection without introducing
system noise
Other connection
configurations of the COMMS
+5V supply are not
recommended – use the +5V
supply instead
COMMS +5V
COMMS GND
1W (200mA)
Notes…
1) The output “+28V” (
±
5%) is the factory set DC output level that is available when running from an
AC “Mains” source – it is possible to increase the 28V output voltage up to 36V (
±
5%) by internal
PSU adjustment. Otherwise, the DC input voltage (minus approx 1.5V) will be used. The greater
of the two will be present, if both power sources are connected together.
2) The term “Communication Signals” refers to serial signals such as RS232, RS485, RS422 and
TTL ArcNet signals. Analogue ArcNet signals are always isolated by nature of the driver hardware
used.