Lowell Seq-4 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 1602

Model SEQ-4 Rev. 02-02-21 | pg. 1/4

Compact low voltage four step sequencer model SEQ-4 is

designed to work with a single external switch 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: Sequencing is initiated by a remote

external switch (order separately).

– The circuitry is designed to operate using a single remote

SPST switch with maintained contact closure.

– The sequencer can accept mulltiple switches if they have

momentary contact closure and Lowell MSM2 module is

connected between the sequencer and switches.

• 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 via an externally

accessible trimpot (0.5-10 seconds).

– LEDs provide visual status of the activation sequence.

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

remote indicators, if needed.

• Compact Chassis: 7" x 3.28" x 1.69" (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 top of 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. (See last page.)

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

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

connection to a single external remote switch with maintained

contact closure (or multiple remote switches with momentary

closure and Lowell MSM2 module wired between the

sequencer and switches). 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 7" x 3.28" x 1.69". 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 are required for sequencer use and

shall be ordered separately.

Low Voltage Sequencer (4 step): SEQ-4

Made in USA

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

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

Spec 1602

Model SEQ-4 Rev. 02-02-21 | pg. 2/4

Connect a single Lowell RPS Series

switch that features MAINTAINED

closure (remains on until turned off)

to the sequencer. The switch

features one LED and uses three

conductors.

Max. distance between SEQ-4 and

switch: 22-gauge wire = 100 ft.,

18-gauge wire = 200 ft.

Connect equipment to Lowell RPC Series

remote power controls that feature classic

connections (not pass-through), and connect

the RPC (switch and common terminals)

to one of the steps on the sequencer.

Up to 10 RPCs can be connected in parallel

on each of the sequencer’s four circuits.

Max. distance between SEQ-4 and RPCs:

22-gauge wire = 6,600 ft.,

18-gauge wire = 17,160 ft.

Switch Schematic

Switch Switch SPST

LED

2.2K 1/2W ResistorCommon

+24V Out

RPC connections

(step 1)

RPC connections

(step 2)

RPC connections

(step 3)

RPC connections

(step 4)

additional

RPCs

additional

RPCs

additional

RPCs

additional

RPCs

MAINTAINED closure

switch has one LED ("ON")

and uses three (3)

conductors

TYPICAL WIRING (single switch):

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

Spec 1602

Model SEQ-4 Rev. 02-02-21 | pg. 3/4

Connect the sequencer to the MSM2 module,

then connect the MSM2 module to

multiple RPS Series switches that feature

MOMENTARY closure (release after being pushed).

Switches that have one LED use three conductors;

switches that have two LEDs use four conductors.

Max. distance between SEQ-4 and MSM2 module:

22-gauge wire = 100 ft., 18-gauge wire = 200 ft.

The MSM2 module includes two remote switch

terminal blocks. Terminals are parallel —

connected internally. Additional switches can be

added by making parallel connections at the MSM2

module, at a remote switch, or anywhere along

switch wiring. Maximum six (6) total.

Connect RPCs

(see previous page)

Off On

Three (3)

conductors

MOMENTARY closure switch

with one LED ("ON")

uses three (3) conductors

MOMENTARY closure switch

with two LEDs ("ON" and "OFF")

uses four (4) conductors

MOMENTARY switch with one or two LEDs

can be connected to either location

TYPICAL WIRING (multiple switches):

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

Spec 1602

Model SEQ-4 Rev. 02-02-21 | pg. 4/4

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 A Remote 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-4 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. Multiple 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 A Remote 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