RM4TG20 TELEMECANIQUE, RM4TG20 Datasheet - Page 30

• Manufacturer Part Number: RM4TG20
• Description: PHASE MONITORING RELAY, DPDT-2CO, 484VAC
• Manufacturer: TELEMECANIQUE
• Series: RM4r

Specifications of RM4TG20

• Contact Configuration: DPCO
• Phase Type: 3 Phase
• Supply Voltage Max: 484VAC
• Switching Voltage Max: 440VAC
• Relay Mounting: DIN Rail
• Length/height, External: 78mm
• External Width: 22.5mm
• External Depth: 80mm
• Carry Current: 8A

Presentation :
pages 3/54 and 3/55
Characteristics :
page 3/56
References :
page 3/56
Dimensions
RM4-LG01, LA32
Probe LA9-RM201
Schemes, connection
RM4-LG01
Setting-up
RM4-LG01
LA9-RM201
R
U
A1
B1
18
80
B2
2
3
15
16
2-conductor cable in
cylindrical sheath
(max.Ø 6.3 mm)
Level electrode
Reference electrode
(skirt)
150
B3
A2
RM4-LA32
R
U
22,5
1
2
3
4
Zelio control - measurement and control relays
Liquid level control relays
Dimensions, schemes, setting-up
RM4-LA32
i Select the empty
i If necessary, set potentiometer
i Set potentiometer
i With all the electrodes immersed, turn the sensitivity potentiometer towards maximum until the relay is energised (
i Then check that the relay de-energises (
i The electrode connection point must be protected against corrosion by sticking or sealing. In areas where thunder-
Note: the high level can be raised by means of the adjustable time delay from 0.1 to 10 seconds with function
The low level can be lowered by means of this same time delay with function
Probe LA9-RM201
This probe is of the “suspended” type. It is coaxial, i.e. in addition to the normal (central) electrode, the stainless steel skirt
can also act as earth (reference) electrode, which means that there is no need to install a separate reference probe. In
this way, for controlling one level, only one probe is required instead of 2; for controlling 2 levels, only 2 probes are required
instead of 3.
The connecting cable must be of the “2-conductor” type, with common cylindrical PVC sheath, having a maximum
diameter of 6.3 mm. The skirt also acts as a ”calming chamber”, so avoiding inaccuracy due to an agitated surface of the
liquid (waves).
Maximum operating temperature: 100 C.
Probe LA9-RM201 can also be fixed on various containers (cisterns, tanks,...) by means of a bracket or other suitable
fixing device.
Connection examples
Control by electrodes
function) or de-energised (
supply voltage.
If the relay is not able to energise, a higher sensitivity scale must be used (selector
must be replaced by an RM4-LA32 relay and the adjustment procedure must be started again.
out of the liquid. If the relay does not de-energise, select a lower sensitivity scale.
storms are likely to occur, measures must also be taken to protect the electrode lines.
A1
B1
28
18
A1
).
B2
15
26
16
Rail mounting
B1
2
25
B3
A2
/fill
to minimum; on RM4-LA select the lowest sensitivity range using potentiometer
B2
B3
A2
function according to the sequence to be performed.
89,5
function), then exceed the threshold by about 10 % to compensate for variation in the
82
1
to minimum (time delay).
A1-A2
B1, B2, B3 Electrodes
15-18
15-16
25-28
25-26
function) or energises (
High
level
Low
level
Supply voltage
(see table opposite)
1st C/O contact
of the output relay
2
of the output relay
nd
C/O contact
Control by probes
RM4-LG01
B2
B3
B1
function) as soon as electrodes B3 and B2 are
Screw fixing
Electrodes and level controlled
B1 Reference or tank earth
B2 High level
B3 Low level
.
2 levels
4
electrode
on RM4-LA32) or relay RM4-LG
Te
B2
B1
4
(5
1 level
3/57
or 5
Ø4
.
3