Alternating Relays

Applications:
Pump sequencing
Compressor sequencing
Machine sequencing

Alternating relays change position each time the control circuit is de-energized. In pumping and compressor applications they will:
1. Switch lead and lag after each cycle.
2. Distribute running time between two pump/compressor systems.
3. Will avoid pulse starts at the beginning of a cycle.

In machine sequencing applications they willl:
1. One switch to provide alternate operation.
2. Energize on one stroke, but not on the next stroke.
3. Resets to default position on power up.

Products:
CAB - Plug-in, Alternating Relay

Associated products:
ISL - Intrinsically Safe 2 input latch relay
ISR - Intrinsically Safe 2 channel relay
LLA - Liquid level, Alarm logic
LLD - Liquid level, Drain logic
LLF - Liquid level, Fill logic
QPB - 4 pump sequencer

Current Relays

Applications:
Motor over current sensing
Motor or heater under current sensing
Motor or heater operation verification
        (Proofing)

Motor over current sensing requirements can occur if:
1. A conveyor jams.
2. The motor bearings lock up.
3. If the system is full.

Motor and heater under current requirements can occur if:
1. The belt from the motor to the conveyor breaks.
2. There is no load on the pump.
3. A heater or lamp in a group has burned out.

Motor and heater verification applications can be:
1. The starter is closed, but the three phase breaker is open.
2. Burned out fuses.
3. Heater or lamp failure.
4. Broken wire.

Products:
CJB - Plug-in, Adj.
CJD - Plug-in, Adj., built-in C-T
CSR - Go-No Go, Self powered
CSRA - Over & under current, Adj.
MCDR - Go-No Go, Self powered

Associated products:
DC Current Sensing Relays
LVM - AC/DC low voltage relay
ZVM - Zero speed switch, 600VAC max.
Single Phase Voltage Relays
SVM - Plug-in, Over & under volt., AC/DC
SVT - Din, Over & under voltage, AC/DC
VKB - Plug-in, Over & under voltage, AC
VWKB - Plug-in, Over & under voltage, AC
Three Phase Voltage Relays
TVM - Plug-in, 3Ø up to 600VAC
PVC - Surface, 600VAC contacts
PVCO/L - Surface, 3Ø up to 600VAC
PVM - Plug-in, Adj., up to 480VAC
PVT - Din mtg., 3Ø up to 600VAC
PVR/L - The PVR/L is now obsolete and has been replaced with the PVT series.

Intrinsically Safe Relays

Applications:
Hazardous switch (no spark) locations
Wastewater treatment
Petro-chemical
   Marine
   Process
Liquid level sensing
   Probe
   Switch

In hazardous probe or switch level sensing applications where a spark could ignite an explosion, intrinsically safe relays will limit the energy allowed to the switch or probe to avoid sparking.
1. Wastewater - Float switches and liquid level probes
2. Petro-chemical - Operational switches, push buttons, limit switches, etc.
3. Marine - Operating switches and level sensing
4. Process - Foot switches in painting areas, limit switches, pushbuttons, etc.
5. Grain processing - Limit switches, pushbuttons, etc.

Products:
ISL - Intrinsically Safe 2 input latch relay
ISR - Intrinsically Safe 2 channel relay

Associated products:
LLA - Liquid level, Alarm logic
LLD - Liquid level, Drain logic
LLF - Liquid level, Fill logic

Liquid Level Control Relays

Applications:
Liquid level sensing
   Probe
   Switch
Motor seal leak detection

This series of R-K liquid level and conductivity sensing controls are typically used in pumping applications for fresh and waste water. They will accept float switch inputs (contact closures), but are also capable of sensing conductivity. Because of the conductivity sensing, they can be used with probes to sense levels in conductive liquids. The probe sensitivity range can go up to 100,000 Ohms, adjustable. This allows these products to also be used in seal leak detection for motors.

1. Fresh water - Pumping for filling tanks, draining tanks or high or low level alarms
2. Waste water - Pumping for filling tanks, draining tanks or high or low level alarms
3. Motors - Seal leak detection

Products:
LLA - Liquid level, Alarm logic
LLD - Liquid level, Drain logic
LLF - Liquid level, Fill logic

Associated products:
ISL - Intrinsically Safe 2 input latch relay
ISR - Intrinsically Safe 2 channel relay

DIN Railing Mounting Rails and Brackets

Applications:
Control panels using Din rail mounting
Ease of installation

These Din rail mounting brackets allow the installation of R-K Products that have only surface mounting capability. They snap on to the R-K product and then on to the Din rail. You can use product identification tags with them and they will accommodate Din rail sizes:

Products:
BNDN - 1 meter din rail, Idec
DRB-1 - Din bracket for RDS, RCS, & SP
DRB-2 - Din bracket for M-series, MCDR
DRB-3 - Din bracket for PVC/O/L & ZVM
DRB-4 - Din bracket for RCD, RCY, CSR

Associated products:
SD - Socket, BAMI, DPDT, RD relay
SG - Socket, BAMI, 4PDT, RG relay
SH - Socket, Idec, 1 to 4 poles, RH relay
SR - Socket, Idec, 8 and 11 pin or blade, RR
SY - Socket, Idec, 2 or 4 poles, RY relay

Relays : BAMI

Applications:
Automation control logic
Electrically activated contacts
Control panels

The BAMI relays are low cost, high quality relays for the automation control industry. They can come with double pole double throw (DPDT) up to four pole double throw (4PDT). Coil voltage can be AC or DC and contact rating vary between 3 amps up to 10 amps.

They can be used to energize loads such as solenoids and started coils. They can also be used to isolate controller output from the industrial environment or simply provide logic functions.

Features available are:
-Plug-in to Din rail mounted sockets
indicating lights to show when the coil is energized
-Flange mounting
-Coil suppression

Products:
RA - BAMI relay, 2 or 3 pole, pin base
RD - BAMI relay, 2 pole, 10 amp, blade
RG - BAMI relay, 4 pole, 3 amp, blade

Associated products:
RH - Idec relay, 1 to 4 poles, 10 amp
RR - Idec relay, 2 or 3 pole, pin or blade
RY - Idec relay, 1 to 4 poles, 10 amp

Relays : IDEC

Applications:
Automation control logic
Electrically activated contacts
Control panels

The Idec relays are high quality relays for the automation control industry. They can come with single pole double throw (SPDT) up to four pole double throw (4PDT). Coil voltage can be AC or DC and contact rating vary between 3 amps up to 10 amps.

They can be used to energize loads such as solenoids and started coils. They can also be used to isolate controller output from the industrial environment or simply provide logic functions.

Features available are:
-Plug-in to Din rail mounted sockets
-Indicating lights to show when the coil is energized
-Manual check buttons
-Flange mounting

Products:
RH - Idec relay, 1 to 4 poles, 10 amp
RR - Idec relay, 2 or 3 pole, pin or blade
RY - Idec relay, 1 to 4 poles, 10 amp

Associated products:
RA - BAMI relay, 2 or 3 pole, pin base
RD - BAMI relay, 2 pole, 10 amp, blade
RG - BAMI relay, 4 pole, 3 amp, blade

Sockets : BAMI

Applications:
Control panels
Ease relay installation

The BAMI sockets are low cost, high quality sockets designed to be used with BAMI relays or many other relays from other manufacturers. They provide for easy installation with Din rail mounting and pressure plates for ease and secure wiring.

Products:
SD - Socket, BAMI, DPDT, RD relay
SG - Socket, BAMI, 4PDT, RG relay

Associated Products:
SH - Socket, Idec, 1 to 4 poles, RH relay
SY - Socket, Idec, 2 or 4 poles, RY relay

Sockets : IDEC

Applications:
Control panels
Ease relay installation

The Idec sockets are high quality sockets designed to be used with Idec relays or many other relays from other manufacturers. They provide for easy installation with Din rail mounting and pressure plates for ease and secure wiring.

Products:
SH - Socket, Idec, 1 to 4 poles, RH relay
SR - Socket, Idec, 8 and 11 pin or blade, RR
SY - Socket, Idec, 2 or 4 poles, RY relay

Associated Products:
SD - Socket, BAMI, DPDT, RD relay
SG - Socket, BAMI, 4PDT, RG relay

Time Delay Relays

Applications:
Automation control
Control panels
Electronic Timing of equipment

Time delays are used when there has to be some time sequence between the operation of relays or loads (solenoids, starters, etc.). There are many functions available. Each function provides the time delay in different ways as to when they start timing and when the outputs are energized to allow the equipment to operate properly.

Products:
Plug-In
CCB - On Delay, Plug-in, 0.05S to 24H
CDB - Interval On, Plug-in, 0.05S to 24H
CFB - Off Delay, Plug-in, 0.05S to 24H
CLRB - Repeat Cycle, Plug-in, 0.05S to 24H
COB - True Off Delay, Plug-in, 0.05S to 1H
CSB - One Shot, Plug-in, 0.05 to 24H
TGM - On Delay, Multi-Range, up to 10H
TUB - Multi-Function & Multi-Range
Solid State
MCS - On Delay, Solid state, 0.10S to 5M
MDS - Interval On, Solid state, 0.10S to 5M
MGS - Off Delay, Solid state, 0.10S to 5M
MRS - Repeat Cycle, Solid state, Up to 5M
MSS - One Shot, Solid state, 0.10S to 5M

Associated Products:
DRB-2 - Din bracket for M-series MCDR
SG - Socket, BAMI, 4PDT, RG relay
SR - Socket, Idec, 8 and 11 pin or blade, RR
SY - Socket, Idec, 2 or 4 poles, RY relay

Transient Voltage Filters (Suppressors)

Applications:
Suppression of:
-Solenoid valves
-Starter coils
-Relays & contactors
PLCs (Programmable logic controllers)
CNCs (Computerized machine controls)

Transient voltage filters are used to suppress the electrical voltage transients that can damage or effect the operation of solid state controls. There are choices of R-C networks (resistor-capacitor) for AC loads, R-D Networks (diode-resistor) for DC loads and voltage clampling units (varistors) for analog control circuits and other loads. The AC and DC filters are all available with varistors in parallel with the R-C networks or R-D networks.

Transient voltage filters are typically applied in parallel with the coil of the inductive load. many time the inductive load causing the problem can not be specifically identified, so filters are applied across all of the inductive loads in the control circuit.

Two Hand Anti-Tie Down Timer

Applications:
Machines that need two hand initiate control
Presses
Shears
Die cutting equipment

The ATB is used in conjunction with two initiate (start) push buttons. By operating both push buttons at the same time, the output contacts of teh ATB will energize. There is a time delay built into the ATB that requires the two push buttons to both be operated within 0.3 seconds of each other to activate the ATB's contacts. If one push button is released, the circuit resets. This requires that both push buttons be released and the sequence started over.

Products:
ATB - Two hand anti-tie down timer

Associated products:
ZVM - Zero speed switch, 600VAC max.

Voltage Relays, Single Phase

Applications:
Low voltage control circuits
Automation controls
Single phase AC motors

Single phase voltage relays are used in applications where the equipment or controls being operated could operate incorrectly or be damaged by low voltage. These applications usually involve combinations of electro-mechanical and solid state controls. As the control voltage drops, some of the solid state equipment may not continue to work correctly, but a contactor or solenoid valve may continue to stay energized. This could be an "out of control" situation. When the voltage goes below a level that is determined to be too low for the controls, the single phase voltage relay will sense that and open a set of contacts. That could shutdown the entire control circuit to avoid problems.

Products:
LVM - AC/DC low voltage relay
SVM - Plug-in Over & under volt., AC/DC
SVT - Din, Over & under voltage, AC/DC
VKB - Plug-in Over & under voltage, AC
VWKB - Plug-in Over & under voltage, AC

Associated Products:
TVM - Plug-in, 3Ø up to 600VAC
PVC - Surface, 600VAC contacts
PVCO/L - Surface, 3Ø up to 600VAC
PVT - Din mtg., 3Ø up to 600VAC
PVR/L - Surface, 3Ø up to 600VAC

Voltage Relays, Three Phase

Applications:
Pump panels
Three phase motor
Conveyors
Blowers
System integrators
Elevators

Three phase voltage relays are used in applications typically involving three phase motors. The purpose of the three phase voltage relays is to avoid damage to a motor because of a line voltage problem. The three phase relays monitor the line voltage for problem conditions which can include: Over voltage, Under voltage, Phase loss (Single Phasing), Phase Rotation and Phase Imbalance. If any of these conditions occur, the three phase relays can be wired into the control circuit to disconnect the motor from the line voltage via a starter or contactor or turn on an alarm. Some units are plug-in, some surface mounted and some are din rail mounted.

Products:
MRT - Motor rotation tester, 600VAC max.
PLRO - Separate Ø loss & Ø reversal output
PRR - Surface, loss & Ø reversal, 600VAC
PRS - Surface, Ø reversal, 600VAC max.
PVC - Surface, 600VAC contacts
PVCO/L - Surface, 3Ø up to 600VAC
PVM - Plug-in, Adj., up to 480VAC
PVR/L - Surface, 3Ø up to 600VAC
PVT - Din mtg., 3Ø up to 600VAC
TVM - Plug-in, 3Ø up to 600VAC

Associated Products:
MCDR - Go-No Go, Self powered
CSR - Go-No Go, Self powered
CSRA - Over & under current, Adj.

Voltage Relays, Millivolt

Applications:
Process control
Analog circuits
0 to 10VDC or 4 to 20 milliamps

Millivolt sensing can be necessary in control or process circuits that operate a very low voltage or low current levels. These products can go from 30 millivolts up to 100volts. Operation is usually that when the voltage goes lower than the set point, the relay output contacts will de-energize. If the voltage is higher than the set point the output relay is energized.

Products:
LVM - AC/DC low voltage relay
ZVM - Zero speed switch, 600VAC max.

Associated Products:
SVM - Plug-in Over & under volt., AC/DC
SVT - Din, Over & under voltage, AC/DC
VKB - Plug-in Over & under voltage, AC
VWKB - Plug-in Over & under voltage, AC

Zero Speed Switches

Applications:
Low or stopped motor rotation
Press machines
Rotating equipment
Conveyors

R-K manufacturers two types of speed switches. The CLR uses a proximity switch input and compares the signal to a frequency level. This technique can determine a slow-down or stopped condition. The LVM, ZVR, and ZVMs monitor the voltage feedback from a motor while it is coasting to a stopped condition. As the motor spins down, it acts like a poor generator, but generates enough signal for the LVM, ZVR, and ZVMs. When the motor comes to a stopped or very near stopped condition, a relay output is operated.