Steca TR A502 TT - Position of the Terminals

8
742.114 | 14.50
EN
4.3.1 Position of the terminals
11
2
13
14
6
7
18
L R1
L
const.
X
NN
PE PEPEPE
N
R1 R2
R
S54321
N
R2
L
const.
11
13
R
S
0-10
15
Fig. 3: Terminals in the lower part of the controller (terminal cover removed)

Power connection terminal block:
L
1x phase conductor (mains input)
R1, R2 2x output (TRIAC, for pumps or valves)
X
not used
L
const.
2x phase conductor (outputs, permanent voltage)
N
4x neutral conductor (common neutral conductors for mains power
input and outputs)
Note
Outputs R1 and R2 are protected by an electronic fuse.

Protective conductor terminal block:
PE
4x protective earth (common protective earth for power connection
terminal block)

Signals terminal block:
1 – 4 4x sensor input (Pt1000 temperature sensor)
5
1x sensor input (Pt1000 temperature sensor or pulse water meter input)
R
S
1x signal output (potential-free relay contact for safety extra-low voltage)
0–10 R1
0–10 R2
2x control output (for 0–10 V-controlled high-efficiency pumps)
7x mass connection (common mass for sensor inputs and control outputs)

Pin strip, for internal use only.

Cable openings on the rear side of the casing

Upper strain relief clamps (2 identical plastic links, each with 2 strain relief clamps,
supplied in the scope of delivery)

Lower strain relief clamps

Cable openings at the bottom of the casing