Emerson FloBoss 104 Safe Use Instructions

Safe Use Instructions – Emerson FloBoss 104
Part D301733X012
February 2018
www.Emerson.com/RemoteAutomation 3
Note: The Rosemount pipe mounting kit is not suitable for
the stainless steel housing. Customers must provide
an appropriate mounting.
▪ Direct mounting on a meter housing.
4. The FloBoss must be properly grounded. The FloBoss
104 has one grounding screw outside the enclosure and
two grounding screws inside the enclosure. See Figure 2.
A
Internal Grounding Screws
B
External Grounding Screw
Figure 2. Back End of FloBoss 104
(with Termination Board)
Proper grounding of the FloBoss 104 helps to reduce the
effects of electrical noise on the unit’s operation and
protects against lightning. The FloBoss provides lightning
protection for built-in field wiring inputs and outputs.
Install a surge protection device at the service disconnect on
DC voltage source systems to protect against lightning and
power surges for the installed equipment. You may also
consider a telephone surge protector for the optional dial-up
modem communications card.
All earth grounds must have an earth to ground rod or grid
impedance of 25 ohms or less, as measured with a ground
system tester. The grounding conductor should have a
resistance of 1 ohm or less between the FloBoss enclosure
ground and the earth ground rod or grid.
If the pipeline to earth impedance is greater than 2 ohms,
the FloBoss installation should be electrically isolated and
a ground rod or grid grounding system installed.
The recommended cable for I/O signal wiring is an
insulated, shielded, twisted-pair. The twisted pair and the
shielding minimize signal errors caused by EMI
(electromagnetic interference), RFI (radio frequency
interference), and transients.
5. The FloBoss must be connected to power, I/O
devices, and communication devices. The external
connections, or field terminals, are all located on the
termination board. The terminal block accepts wires
up to 1.29 mm (16 AWG) in size.
The FloBoss Termination Board connectors use
compression terminals. The input power termination
(CHG+ / CHG-) uses a removable connector and
accommodates wiring up to 1.29 mm (16 AWG) in
size. In all cases, make connections by baring the end
(6 mm maximum) of the wire, inserting the bared end
into the clamp beneath the termination screw, and
then tightening the screw to 0.25 N-m.
Access to wiring connections is via field wiring entries.
The metal pipe plugs provided must remain in place
on unused entries to maintain flame-proof integrity of
enclosure. If these plugs are replaced for any reason,
only install certified plugs or thread adapters that
meet or exceed the product ratings.
DANGER
Do not over torque the connector screws.
Note: Check the input power polarity before turning
on the power.
The inserted wires should have a minimum of bare
wire exposed to prevent short circuits. Allow some
slack when making connections to prevent strain.
The FloBoss 104 accepts input voltages from 8.0 volts
to 28 volts at the charge terminals (CHG+ / CHG-) with
no external current limiting (internal current limit is
200 mA).
The terminals are labeled CHG+ for positive power
connection and CHG- for negative power connection
on a label on the termination board. See Figure 3.
A
B

Emerson FloBoss 104 Specifications

General

Brand	Emerson
Model	FloBoss 104
Category	Measuring Instruments
Language	English