Square D Digest 179

Harmony™ Level, Pump, Speed, Frequency, and Temp. Control Relays

Control and Measurement Relays

Refer to Catalog DIA5ED2160501EN

www.se.com/us

Harmony™ Level Control Relays and Harmony™ Pump Control Relays Harmony level control relays control one or two levels with fill or empty function. The settings are protected by a sealable cover, control status is indicated by an LED, and they are DIN rail mountable. RM35LM is designed to control levels of conductive liquid, and RM35LV is designed to control levels of other materials. Application examples for RM35LM: Application examples for RM35LV: • Detecting pump seal failures • Liquids in the food-processing industry: milk, beer, coffee, etc. • Chemically pure water • Spring, town, industrial and sea water • Metallic salt, acid or base solutions • Liquid fertilizers • Non-concentrated alcohol (<40%) • Fuels, liquid gasses (inflammable) • Oil, concentrated alcohol (>40%) • Ethylene, glycol, paraffin, varnish and paints

RM35LM33MW

RM35LV14MW

Table 20.132: Level Control Relays Time Delay on Crossing the Threshold Function

Measurement Ranges

Catalog Number

Output Relay Supply Voltage 50/60Hz

250–5k 5k–100k 50k–1M

Detection by resistive probes Detection by discrete sensors

2C/O, 5A

RM35LM33MW

0.1–5 seconds, 0+10%

24–240 Vac/Vdc

1C/O, 5A

— RM35LV14MW

Table 20.133: Electrode Holders Description

Catalog Number

Material

RM79696006

Electrode for use up to 662°F (350°C)

Stainless steel isolated by ceramic

RM79696006

Pump Control Relay Harmony pump control relay RM35BA10 can operate on a single-phase or 3-phase supply. It incorporates three functions in a signal unit: • Over and under current measurement • Single or three phase • Phase presence control It has two operating modes which are designed to control a pump via two external signal inputs (Y1 Y2). These two signals are controlled by volt-free contacts. Control inputs Y1 and Y2 can be connected to: • Level sensor • Pressure sensor • Level relay • Push button Table 20.134: Pump Control Relay Description Current Range Controlled Supply Voltage Output Catalog Number

208–480 Vac, 3 phase

Pump Control Relay

1–10A

1C/O5A

RM35BA10

230, single-phase

Approvals for Harmony Level Control and Pump Control Relays

File: E173076 CNN:NRNT, NRNT7

CE 73/23/EEC andEMC89/ 336/EEC

GL, C-Tick, GOST, RoHS

File: 248382 Class: 3211 07

Approximate Dimensions (mm/in.) RM35LM33MW, RM35LV14MW

RM35BA10

35/ 1.38

72/ 2.83

35/ 1.38

72/ 2.83

E1

L1 L2 L3

20 RELAYS AND TIMERS

> I

54 .3

< I

90/ 3.54

Def. Un R

90/

2.8

2.8

Y1 Y2 12 11 14

0.11

0.11

76/ 2.99 72.5/ 2.85

76/ 2.99 72.5/ 2.85

20-55

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