London Electronics EasyReader ER4P, Instruction Manual, Page: 8 / 20

Direct 4-20mA I/P
Connections
We supply detachable screw terminal connectors to make installation as easy as possible for you.
You should use multistrand insulated wire with ferrules to DIN46228/1. You can use stripped wire
with cross sectional area from 0.5 to 2.5mm
2 . Strip back insulation 7mm.
3 cable glands accept the 3 groups of cables up to 6mm diameter.
Use screened cable for the input signal and connect the screen to power earth at the meter end of
the cable only. For best performance, keep the signal cable well away from the power and alarm
cables, which could carry electrical noise likely to interfere with your measurement.
Input Connection Examples:
+
Loop powered 2 wire
4-20mA transmitter
I/P
4-20mA from
active source.
Direct 0-10V I/P
0-10V from
active source
5
Common
Calibration mode
Tare
Peak/Valley
Reset
Screen
termination
point
Exci 0-10V + 4-20mA + Common Lockout
Exci 0-10V + 4-20mA + Common Lockout
Earth
Neutral
Line
Power
Logic I/Ps
Signal I/P
Locked
Unlocked
Locked
Unlocked
Locked
Unlocked
Exci 0-10V + 4-20mA + Common Lockout
Exci 0-10V + 4-20mA + Common Lockout
You can operate the Tare,
Peak/Valley and Reset functions
remotely with contact closures,
or with the front panel buttons.
To activate the front panel
buttons, you must make
permanent connections
between the desired function
connector and Common