Lowell SEQ-4A - Unknown

SEQ-4A - Unknown Lowell - Free user manual and instructions

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Product Type Four-Step Sequencer for AC Power Control
Model SEQ-4A
Dimensions 8.00" x 3.25" x 1.95" (203 x 83 x 50 mm)
Weight 4 lbs (1.8 kg)
Power Requirement 100-240 VAC, 12W (external UL listed power supply included)
Activation Trigger External SPST switch (maintained or momentary with MSM2 module) or voltage input (5-24V AC/DC)
Step Delay Adjustable 2.5 to 12 seconds per step via DIP switch
Activation Sequence Turn on in order (1,2,3,4); turn off in reverse order (4,3,2,1)
Status Indication LED indicators for activation sequence status
Auxiliary Output 24 VDC, 300 mA max for remote indicators
Maximum RPCs per Step Up to 10 remote power controls (RPCs) per step
Maximum Distance (Switch to Sequencer to RPC) 22 AWG: 6,600 ft (2,012 m); 18 AWG: 17,160 ft (5,230 m)
Wiring Requirement Generic cable, no shielding needed
Enclosure Steel chassis with black powder epoxy finish, mounting holes for remote or rack (2U) installation
Country of Origin Made in U.S.A. with global components
Included Accessories UL Listed power supply with NEMA 1-15P plug and three international adaptors (Schuko CEE 7/16, BS1362, AS3112)
Compatible Components Use with Lowell RPC series (classic connections) and RPS switches (ordered separately)
Safety For use with compatible components only; not for pass-through devices; professional installation recommended
Maintenance No user-serviceable parts; clean exterior with dry cloth; avoid moisture
Spare Parts & Repairability Contact Lowell for service; no field-replaceable parts listed

Frequently Asked Questions - SEQ-4A Lowell

What is the Lowell SEQ-4A used for?
The SEQ-4A is a compact low-voltage four-step sequencer designed to control AC-powered equipment by activating and deactivating remote power controls (RPCs) in a timed sequence. It is typically used in audio/visual systems, lighting, or industrial applications to power up devices in a specific order.
How do I trigger the SEQ-4A?
You can trigger the sequencer using an external source: a single SPST switch with maintained contact, multiple SPST switches with momentary closure (using the Lowell MSM2 module), or a voltage input (5-24V AC or DC). The trigger must be connected to the barrier strip terminals.
Can I adjust the delay between steps?
Yes, the delay between steps is adjustable from 2.5 to 12 seconds. Use the DIP switch on the front panel to set the desired delay. A reference chart is printed on the top of the chassis for guidance.
What is the maximum number of remote power controls (RPCs) per step?
The SEQ-4A can support up to 10 RPCs per step, allowing you to control a total of up to 40 devices across four steps.
What type of switches are compatible with the SEQ-4A?
Compatible switches include the Lowell RPS series: rocker or key switches with maintained closure for single-switch use, or with momentary closure for multiple-switch applications (requires MSM2 module). Models with RJ45 connectors are also available.
How far can the switch be from the sequencer?
The maximum distance depends on wire gauge: with 22 AWG wire, up to 6,600 ft (1 mile); with 18 AWG wire, up to 17,160 ft (3 miles). Use any generic cable; shielding is not required.
Does the SEQ-4A include a power supply?
Yes, it includes a UL Listed power supply with a 6 ft cord and NEMA 1-15P plug, plus three international adaptors (Schuko CEE 7/16, BS1362, AS3112) for global use.
What is the auxiliary 24VDC output used for?
The auxiliary output provides 24VDC at up to 300 mA to power remote indicators or other low-voltage accessories, if needed.
Can I mount the SEQ-4A in a rack?
Yes, the chassis is designed for remote installation or rack mounting. It fits a 2U rack space and includes mounting holes for secure installation.
Is the SEQ-4A compatible with devices that have pass-through connections?
No, the SEQ-4A is intended for use with compatible components that feature classic connections only. It is not for use with devices that have pass-through (loop-through) connections.

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USER MANUAL SEQ-4A Lowell

Lowell SEQ-4A - 1
Made in U.S.A with global components

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.

—Singleremote SPST switch with maintained contact closure.

-Multiple 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 Specifications: 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.

Dry Contact Control Connect to any physical switch or control system that will provide a maintained dry contact closure 2 conc. Voltage Control Connect 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. SEQ-4A Trigger Input 5V - 2kV AC or DC 24/DC Output 200mA max Common Switch 2 conc. SEQ-4A Trigger Input 5V - 2kV AC or DC 24/DC Output 200mA max Common Switch

Single Remote Switch Control Any Lowell RPSW or RPSB series maintained contact remote switch model (rocker or keylock) Schematic +24V Gm LED Com 2.2K 1.2kV Switch (Sw) Rassbr Rocker Switch On Key On 3 cond. SEQ-4A Trigger input 5w = 2kV AC or DC 24k DC Output 20mA max Cammoc Switch

Wire requirements: Any generic cable, shielding not needed
Maximum distance between devices: 22ga wire: 1 mile 18ga wire: 3 miles

Lowell SEQ-4A - FEATURES: - 3

flowchart 
graph LR
    A["OFF Ind."] --> B["Schematic"]
    C["ON Ind."] --> D["Red LED"]
    E["Switch (Sw)"] --> F["Gn LED"]
    G["V+"] --> H["2.2K 1/2W Resistor"]
    B --> I["Key Switch"]
    D --> J["Rocker Switch"]
    H --> K["4 cond"]
    I --> L["MSM2 Momentary Switch Module"]
    J --> L
    K --> L
    L --> M["Lowell™"]
    M --> N["Connect to either terminal"]
    N --> O["Connection to RPS"]
    O --> P["3 cond."]
    P --> Q["SEQ-4A"]
    Q --> R["Trigar Inlet: 5V - 24V AC or DC 24V DC Output 20mA max Common Switch"]

OUTPUT CONNECTION OPTIONS:
LOWELL POWER SEQ-4A: Sequencer Power Grid 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000 OPERATIONAL DIAGRAM Delay Settings ON ON Approx. 2½ sec. between steps 10 seconds total Approx. 5 sec. between steps 25 seconds total Approx. 12 sec. between steps 35 seconds total Approx. 8 sec. between steps 45 seconds total Approx. 12 sec. between steps 48 seconds total Control Relay (R/W), R/W/C Power Sequence Step RPC unit (any model) Lowell RPC Series Remote Power Control Unit 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. 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. 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 com)

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-RJ1 LED key switch, 19" panel, RJ45RPSW-P-RJ1 LED rocker switch, white wall plate, RJ45
RPSW-KP-RJ1 LED key switch, white wall plate, RJ45RPSB-P-RJ1 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-MP1 LED rocker switch, white wall plateRPSW2-MP2 LED rocker switch, white wall plate
RPSB-MP1 LED rocker switch, black wall plateRPSB2-MP2 LED rocker switch, black wall plate
RPSB-MR1 LED rocker switch, 19" panelRPSB2-MR2 LED rocker switch, 19" panel
RPSW-MKP1 LED key switch, white wall plateRPSW2-MKP2 LED key switch, white wall plate
RPSB-MKP1 LED key switch, black wall plateRPSB2-MKP2 LED key switch, black wall plate
RPSB-MKR1 LED key switch, 19" panelRPSB2-MKR2 LED key switch, 19" panel
RPSB2-MP-RJ2 LED rocker switch, black wall plate, RJ45RPSW2-MP-RJ2 LED rocker switch, white wall plate, RJ45
RPSB2-MKP-RJ2 LED key switch, black wall plate, RJ45RPSW2-MKP-RJ2 LED key switch, white wall plate, RJ45
RPSB2-MR-RJ2 LED rocker switch, 19" panel, RJ45RPSB2-MKR-RJ2 LED key switch, 19" panel, RJ45

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

Model Description Model Description

RPC-15RPC with (2) 15A NEMA outlets, cordRPC-15-SRPC with (2) 15A NEMA outlets, surge supp, cord
RPC-15-SCD-RJRPC with (2) 15A NEMA outlets, cord, RJ45RPC-15-URPC with (2) IEC C13 oulets, cord
RPC-20-CDRPC with (2) 20A NEMA outlets, cordRPC-20-SCDRPC with (2) 20A NEMA outlets, surge supp, cord
RPC-20-SCD-RJRPC with (2) 20A NEMA outlets, surge supp, cord, RJ45RPC-3N1RPC with (8) 15A NEMA outlets, cord
RPC-20-HWRPC with (2) 20A NEMA outlets, whipRPC-20-SHWRPC with (2) 20A NEMA outlets, surge supp, whip

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

SEQ & SEQR Series Overview — sequencers with classic connections

Model No.ChassisStepsAlternate Sequence ModeOnboard SwitchREQUIRES External SwitchACCEPTS Multiple Remote SwitchesACCEPTS Input from Alarm SystemACCEPTS Input from Lowell Switch w/RJ45Power InputCountry of Origin
This specSEQ-4Astandalone4------yesthrough MSM2------ power supplyUSA
SEQ-8standalone8------yesyes------power supplyUSA
SEQR-41U panel4---rocker---yesyes---power supplyUSA
SEQR-4K1U panel4---key---yesyes---power supplyUSA
SEQR-81U panel8yesrocker---yesyes---power supplyUSA
SEQR-8K1U panel8yeskey---yesyes---power supplyUSA
SEQR-8RJ1U panel8yesrocker---yesyesyespower supplyUSA

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 options above). Note that these switches include a single RJ45 connector and are not part of Lowell's "pass-through" series.
NOTE: For rackmount sequencers that include AC power outlets, see Lowell ACR Series or ACSPR Series.

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Brand : Lowell

Model : SEQ-4A

Category : Unknown