Toshiba RTM20 User manual

TOSHIBA
TEMPERATURE CONTROL
RELAY
MODEL RTM20

Toshiba's RTM20
relay is designed to monitor
temperature of :
Bearings
Motor stator windings
Generator stator windings
Engine exhaust
Engine cylinders
Furnaces
Industrial processes
RTD (resistance temperature detector)
inputs are three compensated wire leads .
*Adjustable trip-point setting (40°C
to 195°C)
*Alarm outputs at 90% of trip temperature
" 12 mm display
e Alarm sounds if sensors break .
Rugged, compact case .
*Selectable RTD materials

Group A trip
indicator -
Group A trip temperature
set switches
Group B trip
indicator
I
Group
B trip temperature set switches--
Group
C trip indicator
Group C trip temperature set
switches-
I
Temperature set point mode
selection switches
The Model
RTM20 temperature control relay has eight
different
channels, each of which is devoted to
a
separate RTD . There are
two ways, or modes, of
using
the eight
channels . In mode 1, six
channels (RTD's)
can be set at one
trip temperature and the other two
Table 1 Trip Temperature
Channels
-Temperature
indicator
Power ON and OFF
indicator
Sensor disconnection
or burnout indicator
Temperature
indicator set switch
Manual reset
switch
RTD selection switches
Reset mode selection switch
(manual or
automatic)
can be set at
another trip temperature . In mode
2,
three
channels can be set at
one trip temperature,
two at a second
trip temperature and three
at a third
trip temperature . In each
mode, eight different places
can be
monitored .
Channel
Mode
1
2 T 3T4
5678
1
Trip temperature A
Trip temp .
B
2 Trip temp
. Trip temp . Trip temp .
ABC

Table 1 General Specification
Table 2 Contact Capacity
* C300 per UL/NEMA .
Alarm and Trip Outputs
The alarm connected to either of the A, B or C group
of channels goes off when the monitored temperature
on one of the channels in that group rises to 90% of
the set trip temperature, or when an RTD contact is
broken for some reason .
If the temperature continues to rise, it may eventually
exceed
the
preset
trip level . When that
happens,
the
trip indicator for either group A, B or C will light up on
the front
of
the
relay .
Item
Specification
Temperature display range -
20 to 200°C
Frequency
50/60 Hz
AC 100 to 120 V
Supply voltage
DC 100 to 125 V
Power consumption 6 W
Ambient
Operation -10 to
60°C
temperature
Storage -20
to 70°C
Trip setting 40 to 195°C
range
Outputs
No . of outputs 6 outputs (1 trip
& 1 alarm out-
puts for each
group)
Sensor (RTD) Pt 100
Ni 100
Inputs
Ni 120
Cu 10
No . of
points 8
AC or DC
Continuous Breaking
Resistive 250 V - 5 A
AC * Inductive 5 A 250 V - 2 A @
pf =
0
.4
Resistive
30 V - 5 A
DC
Inductive 5 A 125 V -0 .0 7A @
L/R=7ms

RTD1
RTD3
RTD5
RTD7
-m ,A
- ~1 b
'~o 1S
y
3A
-+~ 3B
-+e 3b
-'5A
^ ' 58
Sb
;~o 3S
-~ 7A
- .~ 7B
7b
2A
2B
2b
2S --
4A
4B
4-
6A
6B
6b
4S
SA
SB 0-4
8b 0-
O
POWER o
0
CONTROL
TERMINAL
BOARD
RTD2
RTD4
RTD6
RTDS
Drilling Plan
6 (Y5/64) DIA HOLES

6 (15/64) DIA . HOLES
-6 PLACES

-4 PLACES
94 (3-11/16)

94 (3-1,_/16)
104 (4-3/32)

J

~ -3/32 )
Standard

Installation
with
Installation

M5 Bolts (M5
Nuts are
Provided on the
Relay .)
Unit : mm (in)

Unit :
mm (in)
ALARM
o -o o -o
TRIP
GROUP-A
ALARM
o -o o --0
TRIP
GROUP-B
O-4
o
-O
ALARM
TRIP
GROUP-C
o-0o-0

TOSHIBA
TOSHIBA CORPORATION
INDUSTRIAL EQUIPMENT DEPARTMENT
1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO, 105-8001
JAPAN
TEL :[phone] FAX :[phone]
*For further
information, please contact your nearest Toshiba Liaison Representative or International Operations-Producer
Goods .
. The data given in this catalog are subject to change without notice .
98-7(A) 70979
Toshiba
International Corporation :
Houston, Vancouver
Toshiba International Corporation
Pty . Ltd . : Sydney, Melbourne
Toshiba
International
(Europe)
Ltd
.
Printed in Japan