EFLOW EF-Series - 2.5 CONNECTING THE EF-SERIES UNIT TO WIRING

EF-Series Instruction Manual
Rev 2/01 2-15
2.5 CONNECTING THE EF-SERIES UNIT TO WIRING
The following paragraphs describe how to connect the EF-Series unit to power, ground, I/O devices,
and communications devices. Use the recommendations and procedures described in the following
paragraphs to avoid damage to equipment.
The field wiring terminations are accessed by opening the front door. The wiring terminals are
arranged on the lower edge of the Main Electronics Board. The terminal designations are printed on
the circuit board (see Figure 2-1 on page 2-9).
This section includes:
♦ Making Wiring Connections
♦ Connecting Ground Wiring
♦ Connecting Main Power Wiring
♦ RTD Wiring
♦ Discrete Output Wiring
♦ Connecting Communications Wiring
♦ Sensor Wiring
CAUTION
Always turn the power to the EF-Series unit off before you attempt any type of
wiring.
CAUTION
To avoid circuit damage when working with the unit, use appropriate electrostatic
discharge precautions, such as wearing a grounded wrist strap.
2.5.1 Making Wiring Connections
The Main Electronics Board connectors use compression terminals that accommodate wiring up to #16
AWG in size. The input power terminations use a removable connector and accommodate wiring up
to #14 AWG in size. In all cases, connections are made by baring the end (¼ inch maximum) of the
wire, inserting the bared end into the clamp beneath the termination screw, and then tightening the
screw.
The inserted wires should have a minimum of bare wire exposed to prevent short circuits. Allow some
slack when making connections to prevent strain on the circuit board and to provide enough clearance
to allow the Main Electronics Board to swing out. This allows access to the batteries without removal
of the field wiring.