London Electronics EasyReader ER2C, Instruction Manual, Page: 8 / 20

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.
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 cables,
which could carry electrical noise likely to interfere with your measurement.
Some Input Connection and jumper positioning examples:
5
Common
not used
not used
Peak/Valley
Reset
Screen
termination
point
Exci Input 2 Input 1 Common Lockout
Exci Input 2 Input 1 Common Lockout
Earth
Neutral
Line
Power
Logic I/Ps
Signal I/P
Locked
Unlocked
Locked
Unlocked
Locked
Unlocked
Exci Input 2 Input 1 Common Lockout
Exci Input 2 Input 1 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
O f f
On (for contact closure inputs)
Pullup/down
Debounce I/P2 Debounce I/P1
Sensitivity
Pull-Up
Pull-Down
NPN Sensor PNP Sensor Contact Closure (Default)
2.5V & 3.5V thresholds
0 and 1V thresholds
0 and 20mV thresholds
You may want to see the input
stage circuit diagram. It is on
page 12.
You can also fill in a wiring
record sheet on page 16 for
future reference
Rear-case Finger-Screws - please read carefully
Only gently tighten these screws. There is no need to fit them so tight that your fingers
hurt. We use this type of screw to prevent damage from being caused to the threads.
D o n o t u s e h a n d o r p o w e r t o o l s t o t i g h t e n t h e s e s c r e w s .