TR-42 Temperature Protection Relay
3
Instruction Manual: TR42 GBM 25/02/2021
Visib
le
onl
y
if
FA
N
ACT
IVATI
O
N
=
ON
PT SENSORS ENABLED FOR FAN
;
Select
4
if the temperature of the PT4 sensor will be considered
for the control of the FAN contact. If
3
is chosen, PT4 will NOT be
considered.
WEEKLY FAN
;
If
ON
, the FAN contact will be closed for 5min each week. This
function is useful in case the fans connected have not been used
for a long time, causing mechanical parts (bearings) to
deteriorate, increasing reliability.
BUZZER
(Optional: see ORDER CODE)
;
;
A high-pitched tone will sound when temperature reaches the L1 or L2
threshold. This buzzer is installed inside the product.
COMMUNICATION BAUD RATE
9 6
(9600);
(19200);
(38400);
(57600);
(115200)
Baud rate.
ADDRESS
1
÷
Modbus address.
PARITY
;
;
;
;
;
Parity and stop bit.
LOCAL/REMOTE CONTROL
;
:
No setpoint modifications via RS-485, except
o
C MAX reset.
:
Setpoint modifications via RS-485 are allowed.
4-20mA OUTPUT CHANNEL
(Optional: see ORDER CODE)
;
; ;
;
;
Select how the temperatures will be transmitted through the
4-20mA output.
, ,
or
: only the selected PT will be transmitted.
: this option will scan each PT sensor every 5sec.
: hottest PT sensor among the ones connected.
4-20mA OUTPUT LOAD
(Optional: see ORDER CODE)
100
;
200
;
300
;
400
;
500
Select the resistive load [Ω].
PASSWORD MANAGEMENT
; ;
(change password)
:
password not requested to modify the setpoints.
: password requested to modify the setpoints.
:
the user can change the password only if: password previously
inserted and
USER LOGIN STATUS =
ON
.
STEP 1: the display will show
(new password).
STEP 2: insert the three new digits.
To abort press the SET, °C MAX, AUTO button or wait 20sec without pressing
any key.
STEP 3: to confirm the new password inserted, press ENTER. The display
will show
.
Forgot password?
Reset to
factory default password
(
).
STEP 1: disconnect all PT sensors.
STEP 2: keep simultaneously pressed the UP and DOWN buttons for 2sec.
The display will show
. The password is now reset.
USER LOGIN STATUS
;
If the password was previously inserted, the user will remain
logged in for 5min from the last button pressed.
TEST
:
;
;
;
;
;
The
;
;
;
(fault) relay tests work only if the
relays are not already excited. It lasts approximately
5sec.
The
Test will simulate the following temperatures
for 5sec each: 60°C, 180°C, 60°C and 180°C.
(buzzer) Test.
4-20mA INDICATOR CALIBRATION ENABLING MENU
(Optional: see ORDER CODE)
;
Select
ON
to enable the 4mA and the 20mA indicator calibration correction.
CALIBRATION CORRECTION AT 4mA
(Optional: see
ORDER CODE)
0.800÷1.200
Step: 0.001
4mA will be applied to the output and it will be possible to correct
the calibration value.
Visib
le
onl
y
if
P
SW
M
AN
AG
. =
ON
Visib
le
onl
y
if
U
SE
R L
OG
IN
S
TAT
U
S
=
ON
Visib
le
onl
y
if
4-
20
m
A
CAL
IB
RAT
IO
N
EN
A
B
LI
N
G
M
EN
U
=
ON
