Lowell Seq-4a User manual

Lowell strives to provide accurate information while reserving the right to change specications and/or improve manufacturing methods without prior notication.

Spec 2216

Model SEQ-4A Rev. 09-20-22 | pg. 1/3

INTERNAL USE ONLY: PN 24188

Compact low voltage four step sequencer model SEQ-4A is

designed to work with a single external switch or voltage input

and low voltage remote power controls (RPCs) to provide time-

delayed activation and deactivation of AC powered equipment

on site or at remote locations.

Note: This sequencer is for use with compatible components that feature classic

connections. It is not for use with devices that feature pass-through connections.

FEATURES:

• Power Requirement: 100-240VAC 12W

• Activation Trigger: This sequencer requires an external

source for activation. See last page for compatible

components.

– Single remote SPST switch with maintained contact closure.

– Mulltiple remote SPST switches with momentary contact

closure and Lowell's MSM2 module connected between

the sequencer and switch.

– Voltage input (5V-24V, AC or DC)

• Four (4) Step Delay:

– Time-delayed closure circuits activate in sequential order

(1, 2, 3, 4) and deactivate in reverse order.

– The delay between steps can be adjusted by setting the DIP

switch on the front (2.5 to 12 seconds between steps). A

reference chart is printed on the top of the chassis.

– LEDs provide visual status of the activation sequence.

– Includes auxiliary 24VDC output (300mA max.) for use with

remote indicators, if needed.

• Compact Chassis: 8.00" x 3.25" x 1.95" (4 lbs.) steel

chassis with black powder epoxy finish and mounting holes.

– Unit can be installed in a remote location or rack panel (2U).

– Operational diagram printed on chassis aids system set-up.

• Country of Origin: Made in U.S.A. with global components

• Power Supply: UL Listed power supply (100-240VAC input,

24VDC 500mA output) with 6 ft. cord and NEMA 1-15P plug.

Includes three adaptors for international use (Schuko CEE

7/16, BS1362, AS3112).

• Installation: The sequencer is typically installed in a

convenient location, while remote power controls are placed

near equipment to be controlled in another rack, room or

building.

– Maximum distance between switch, sequencer and remote

power controls: 22 gauge wire = 6,600 ft.; 18 gauge wire

= 17,160 ft.

– System Capacity: Accepts up to 10 RPCs per step.

• Connections: Order compatible remote power controls and

switches separately.

• A&E Specications: The four step sequencer shall be Lowell

model SEQ-4A, which shall feature barrier strip terminals for

connection to a single external remote switch with maintained

contact closure, multiple remote switches with momentary

closure and Lowell MSM2 module wired between them, or a

voltage input trigger. The sequencer shall connect to external

remote power controls (RPCs) to activate remote equipment in

four steps with an adjustable time delay between each step.

It shall activate RPCs in order (1, 2, 3, 4) and deactivate them

in reverse order. The sequencer shall feature a steel chassis

with mounting holes, black powder epoxy finish, and overall

dimensions of 8.00" x 3.25" x 1.95". It shall be made in the

USA with global components, and include a UL Listed power

supply with NEMA 1-15 plug and three adaptors (Schuko

CEE 7/16, BS1362, AS3112). External switches and remote

power controls shall be ordered separately.

Low Voltage Sequencer (4 step): SEQ-4A

INPUT for activation trigger

Chart for connections

LEDs show sequencing status

OUTPUT to connections

(up to 10 RPCs for each circuit)

Includes power supply

with NEMA 1-15 plug

and three adaptors

Made in U.S.A

with global

components

Lowell strives to provide accurate information while reserving the right to change specications and/or improve manufacturing methods without prior notication.

Spec 2216

Model SEQ-4A Rev. 09-20-22 | pg. 2/3

INTERNAL USE ONLY: PN 24188

INPUT CONNECTION OPTIONS:

OUTPUT CONNECTION OPTIONS:

V+

ON Ind.

OFF Ind.

V+

ON Ind.

OFF Ind.

Connect to

MOMENTARY

RemoteSwitches

+24V

Com

N.O.

N.C.

Model MSM2

Connect

to RPC

See Spec/Install sheet

for application de ta il s

Off

Connect to any physical switch or

control system that will provide a

maintained dry contact closure

Dry Contact Control

Switch

Common

24VDC Output

200mA max

Trigger Inpu t

5v – 24v AC or DC

nnect to any device or control system

that will provide a maintained voltage

between 5 and 24 volts AC or DC.

If DC, observe polarity:

Common=Neg, Trigger Input=Pos.

Voltage Control

Switch

Common

24VDC Output

200mA max

Trigger Input

5v – 24v AC or DC

Any Lowell RPSW or RPSB series maintained contact

remote switch model (rocker or keylock)

On On

Rocker

Swit ch

Key

Swit ch

(Sw)

Com

+24V

2.2K 1/2W

Resistor

Schematic

Grn LED

Single Remote Switch Control

Switch

Common

24VDC Output

200mA max

Trigger Inpu t

5v – 24v AC or DC

Switch

Common

24VDC Output

200mA max

Trigger Inpu t

5v – 24v AC or DC

Key

Swit ch

OnOff

(Con ne ct

to NO)

Grn LED

2.2K 1/2W

Resistor

V+

Swit ch

(Sw)

ON Ind.

Red LED

OFFInd.

Schematic

Any Lowell RPSW2-M or RPSB2-M series momentary

contact remote switch model (rocker or keylock)

Max. 6 switches

Multiple Remote Switch Control

Connect to

either terminal

MSM2 Momentary Switch Module

SEQ-4A

Wire requirements:

Any generic cable, shielding not neede

Maximum distance between devices:

22ga wire: 1 mile

18ga wire: 3 miles

2 cond.

3 cond.

4 cond.

Rocker

Swit ch

OnOff

Norm

Test

Activated

Power

Inpu t 5v-24v

AC or DC

+24VDC Ou t

Common

Switch

Surg e Protection Active

When Lit (-S mo de ls only)

RPC Series

Remote Powe r Co ntrol Un it

No rm

Test

Pwr

Activat ed

Swit ch

Comm on

24VDC Output

20 0mA max

Trigger In put

5v – 24 v AC or DC

No rmally Closed

No rmally Open

Co mmon

RPC unit

(any model)

RY-2A or RY-4A Relay Module

To additional RPCs

and/or relay modules

Step 1 connections shown

Steps 2, 3, and 4 connections are identical.

NOTE:

Any combination of RPC series models

and/or RY series models may be

connected to each sequencer step

Maximum 75 units per sequence step.

Wire requirements:

Any generic cable, shielding not needed

Maximum distance between sequencer and RPCs / relays:

22ga wire: 1 mile

18ga wire: 3 miles

NOTE: Maintain polarity

(switch to switch, com to co

2 cond.

Delay Settings

Approx. 5 sec.

between steps

20 seconds total

Approx. 2½ sec.

between steps

10 seconds total

Approx. 8 sec.

between steps

32 seconds total

Approx. 12 sec.

between steps

48 seconds total

Lowell strives to provide accurate information while reserving the right to change specications and/or improve manufacturing methods without prior notication.

Spec 2216

Model SEQ-4A Rev. 09-20-22 | pg. 3/3

INTERNAL USE ONLY: PN 24188

OPTIONS: (order separately)

• SWITCH for single switch applications: (RPS Series switch with maintained closure)

Model Description Model Description

RPSW-P 1 LED rocker switch, white wall plate RPSW-KP 1 LED key switch, white wall plate

RPSB-P 1 LED rocker switch, black wall plate RPSB-R 1 LED rocker switch, 19" panel

RPSB-KR 1 LED key switch, 19" panel RPSB-R-RJ 1 LED rocker switch, 19" panel, RJ45

RPSB-KR-RJ 1 LED key switch, 19" panel, RJ45 RPSW-P-RJ 1 LED rocker switch, white wall plate, RJ45

RPSW-KP-RJ 1 LED key switch, white wall plate, RJ45 RPSB-P-RJ 1 LED rocker switch, black wall plate, RJ45

• SWITCH for multiple-switch applications: (RPS Series switch with momentary closure and MSM2 module, see chart below)

Model Description Model Description

RPSW-MP 1 LED rocker switch, white wall plate RPSW2-MP 2 LED rocker switch, white wall plate

RPSB-MP 1 LED rocker switch, black wall plate RPSB2-MP 2 LED rocker switch, black wall plate

RPSB-MR 1 LED rocker switch, 19" panel RPSB2-MR 2 LED rocker switch, 19" panel

RPSW-MKP 1 LED key switch, white wall plate RPSW2-MKP 2 LED key switch, white wall plate

RPSB-MKP 1 LED key switch, black wall plate RPSB2-MKP 2 LED key switch, black wall plate

RPSB-MKR 1 LED key switch, 19" panel RPSB2-MKR 2 LED key switch, 19" panel

RPSB2-MP-RJ 2 LED rocker switch, black wall plate, RJ45 RPSW2-MP-RJ 2 LED rocker switch, white wall plate, RJ45

RPSB2-MKP-RJ 2 LED key switch, black wall plate, RJ45 RPSW2-MKP-RJ 2 LED key switch, white wall plate, RJ45

RPSB2-MR-RJ 2 LED rocker switch, 19" panel, RJ45 RPSB2-MKR-RJ 2 LED key switch, 19" panel, RJ45

• REMOTE POWER CONTROL: (RPC Series with classic connections)

Model Description Model Description

RPC-15 RPC with (2) 15A NEMA outlets, cord RPC-15-S RPC with (2) 15A NEMA outlets, surge supp, cord

RPC-15-SCD-RJ RPC with (2) 15A NEMA outlets, cord, RJ45 RPC-15-U RPC with (2) IEC C13 oulets, cord

RPC-20-CD RPC with (2) 20A NEMA outlets, cord RPC-20-SCD RPC with (2) 20A NEMA outlets, surge supp, cord

RPC-20-SCD-RJ RPC with (2) 20A NEMA outlets, surge supp, cord, RJ45 RPC-3N1 RPC with (8) 15A NEMA outlets, cord

RPC-20-HW RPC with (2) 20A NEMA outlets, whip RPC-20-SHW RPC with (2) 20A NEMA outlets, surge supp, whip

RPC-30-SHW RPC with 30A Twistlock outlets, surge supp, whip

This

spec

SEQ & SEQR Series Overview — sequencers with classic connections

Alternate

REQUIRES ACCEPTS ACCEPTS ACCEPTS

Sequence Onboard External Multiple Remote Input from Input from Lowell Power Country

Model No. Chassis Steps Mode Switch Switch Switches Alarm System Switch w/RJ45 Input of Origin

SEQ-4A standalone 4 --- --- yes through

MSM2

--- --- power supply USA

SEQ-8 standalone 8 --- --- yes yes --- --- power supply USA

SEQR-4 1U panel 4 --- rocker --- yes yes --- power supply USA

SEQR-4K 1U panel 4 --- key --- yes yes --- power supply USA

SEQR-8 1U panel 8 yes rocker --- yes yes --- power supply USA

SEQR-8K 1U panel 8 yes key --- yes yes --- power supply USA

SEQR-8RJ 1U panel 8 yes rocker --- yes yes yes power supply USA

Steps = Unit activates/deactivates connected remote power controls (RPCs) in four or eight steps, with a delay between each. Up to 10 RPCs can connect to each step.

Alternate Sequence Mode = The ASM feature skips selected outputs to allow partial startup of system, useful for small events or rehearsals. It requires remote switch

model RPSB-KP-ASM to enable ASM function before main switch is activated.

Onboard Switch = Sequencers without an onboard switch will require an external switch for activation.

REQUIRES External Switch = Sequencer can be controlled by one external switch, usually placed in a remote location (RPS series switch with MAINTAINED closure).

ACCEPTS Multiple Remote Switches = Sequencer can be controlled by one or more external switches placed in remote locations (RPS Series switches with

MOMENTARY closure). Some models require the MSM2 module in order to accept multiple switches.

ACCEPTS Input from Alarm System = Sequencer can accept control override from an alarm system (alarm by others, not included).

ACCEPTS Input from Lowell Switch w/RJ45 = Sequencer is designed for use with a Lowell MOMENTARY switch that has a model number with "-RJ" as a suffix (see