Installation
Terminal Connections (
continued
)
If a device other than a General Monitors
readout/relay display module is being used,
the commons, COM, of both systems must be
connected together.
See Appendix, section
5.4.
The Model S104 Enhanced Smart Sensor op-
erates on a nominal power of +24 VDC. Pri-
mary DC power must be provided by the
customer unless one of the following General
Monitors Modules is being used with the
Model S104:
l
DC110 Readout/Relay Display Module
with Power Supply & Relay Module
l
DC130 Readout/Relay Display Module
l
TA102A Trip Amplifier Module with a
PS002
The following General Monitors Modules
provide power connections for the Model
S104, but need a customer supplied DC
source:
l
DC110 Readout/Relay Display Module
without Power Supply & Relay Module
l
DC120 Dual Channel Display Module
l
TA102A Trip Amplifier Module without
a PS002
Since the Model S104 is designed to operate
continuously, a power switch is not included
in order to prevent accidental system shut-
down.
NOTE: Power must remain disconnected
until all other wiring connections have been
made.
The maximum distance between the Model
S104 and the power supply is 4500 feet (1372
meters). See the Appendix (section 5.1.2) for
cable length specifications.
The cable run
should be as short as possible.
figure 11
To c24VDC to the Model S104, con-
nect the red wire to TB1, position 7 (CE Mark
units - TB3, position 3), l24VDC.
Connect the black wire to TB1, position 6
(CE Mark units - TB3, position 2), labeled
COM (figure 11).
3.5
Applying Power
Before applying power to the system for the
first time, all wiring connections should be
checked for correctness and the housing cover
replaced. Upon first power-up the sensor may
take up to fifteen minutes to stabilize.
At the initial application of power, or after a
fault condition, the unit will enter a fifty sec-
ond Start-Up mode. During this period the
display will indicate an SU.
GENERAL MONITORS
Model S104
9
