Wire Sizes; Precautions; Sensor Input (Measuring Input); Thermocouple Input - ero electronic ELK Manuel Utilisateur

2.3. Wire Sizes

The screw terminals accept wire sizes from 0.5 to 1.5
mm (16 to 22AWG). Hinged covers prevent hands or
metal making accidental contact with live wires. The
rear terminal screws should be tightened to 0.4Nm
(3.5lb in).

2.4. Precautions

•
Do not run input wires together with power cables
•
When shielded cable is used, it should be grounded
at one point only
•
Any external components (such as zener barriers)
connected between sensor and input terminals may
cause errors in measurement due to excessive
and/or un-balanced line resistance, or leakage
currents.
•
Not isolated from the logic outputs & digital inputs
•
Pay attention to line resistance; a high line
resistance may cause measurement errors
Part number HA028438. Issue 3.0.

2.5. Sensor Input (Measuring Input)

Includes thermocouple, platinum resistance
thermometer, mA, mV and volts.
2.5.1.
5
6
•
Use the correct compensating cable preferably
shielded.
2.5.2.
4
5
6
•
The resistance of the three wires must be the same.
•
The line resistance may cause errors if it exceeds
22Ω.
Oct-05

Thermocouple Input

ELK model
+
Positive
11
12
Negative
-

RTD Input

10
ELK model
11
12
ETK model
+
Positive
Negative
-
ETK model
13