Rev. 1.0
WALTHER Temperature Controller Bundle WTRB-x-x
Page 11 of 42
Walther Systemtechnik GmbH
– D 76726 Germersheim
Telefon: +49 (0)7274-7022-0 Telefax: +49 (0)7274-7022-91
http://www.walther-2000.de
5.2 Electrical Installation / Start of Operation
The Walther Temperature Controllers WTR-x have inlets and outlets, as listed in
Table 3
. Please refer to
Figure
1
for the numbering of the connections. Please refer to model WTR-24DC or WTR-230AC for the voltage supply
at the marked pins (L+ / L- resp. L1 / N).
Pins 10 and 8 were configured as analog inputs for a PT100 2-wire resistance thermometer. The alarm outlets
for insufficient or excess temperature errors are integrated as make contacts at the pins 4 and 5, resp. 6 and 7.
The solid-state relay WSSR-x-x will be connected at the pins 13 and 14 of the logic output.
IMPORTANT
In order to also detect sensor errors and cable breaks at the alarm outputs, the make-contact
relays are permanently locked within the valid temperature range. If the preset temperature is
exceeded or fallen below, the contact will be interrupted (see also chapter 5.3.2 Limit Monito-
ring ).
Input
Symbol
Pin
Voltage supply
WTR-24DC:
24V DC
WTR-230AC: 230V AC
L1 (L+)
N (L-)
Analog input
Resistance thermometer
PT100 2-wire
10
8
Output
Relay output
(make contact)
1
Alarm output
– error insufficient temperature
4
5
Relay outlet
(make contact)
2
Alarm output - excess temperature error
6
7
Logic output
(DC 0/12V)
Solid-state relay
13
14
Table 3: Overview of the inputs and outputs for the
WTR-x and the pin assignment
Figure 1:
View of back with terminal assignment for the WTR-24DC and WTR-230AC
AC/DC
U
x
