Contemporary Control Systems BASremote Installation Guide - Manual (Page 10)

TD040300-0II
10
P OWERING
The unit (except for the BASR-8M/P) requires 24 VDC or VAC from a
source via a three-pin removable keyed connector. The proper connections
for various power options are illustrated below.
NOTE:
This device is intended for use with Class 2 circuits.
Figure 8 — Power Options
The recommended size for power conductors is 16–18 AWG (solid or
stranded). Ground is directly connected to zero volts. Input connections
are reverse-polarity protected.
An internal source provides 24 VDC (allowing a maximum current
draw of 150 mA) to power external transmitters connected as inputs to
the BASR — so a separate loop supply is unneeded.
WARNING: Powering devices can special present hazards. Read the
following text carefully.
Power Supply Precautions
Internally, the BASR utilizes a half-wave rectifier and therefore can
share the same AC power source with other half-wave rectified devices.
Sharing a common DC power source is also possible. Sharing AC
power with full-wave rectified devices is NOT recommended. Full-
wave rectified devices usually require a dedicated AC power source
that has a secondary elevated above ground. Both secondary connections
are considered HOT. AC power sources that power several half-wave
devices have a common secondary connection called COMMON, LO,
or GROUND. This connection might be tied to earth. The other side
of the secondary is considered the HOT or HI side of the connection.