MURPHY SENTRY SERIES battery chargers
Sentry series Automatic Battery Chargers

Murphy Sentry提供可靠的浮充通风铅酸或镍镉电池。Sentry充电器是基于一个经济的开放式框架设计，但可以提供一个壁挂式外壳完整的电流表。该系列产品有标准Sentry、Sentry 7或UL1236/CSA认证版本。Sentry提供自动，电流限制和可控硅控制的充电通风铅酸或镍镉电池。The Sentry range provides reliable float charging for vented lead acid or NiCd cells.Sentry chargers are based around an economical open-frame design, but can be supplied with a wall mounted enclosure complete with ammeter. The range is available in standard Sentry, Sentry 7 or UL1236/CSA approved versions. The Sentry range provides automatic, current limited and thyristor controlled charging of vented lead acid or NiCd batteries.

The units may be used in a wide range of industrial charging applications, including standby engines, pumps and generators. The charger uses an open frame construction, designed for surface mounting in an enclosed panel. Each unit consists of a transformer, rectifier and control circuit. The control circuit ensures that the charger maintains a battery voltage at the precalibrated float level, whilst supplying any additional loads current up to the specified maximum.

Sentry is designed to give a constant current output while battery voltage is below a ‘knee point’ (approx. 13V on a 12V LA). Above the knee-point, as the battery approaches its float voltage, the charger output current ramps down. This multi-stage charge regime gives an optimum combination of fast charge rate, followed by float charge without overcharging.

Sentry series

Sentry 7 series

Sentry UL series

WARNING : This product can expose you to chemicals including lead, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information about California Propsition 65, go to www.P65Warnings.ca.gov or visit our California Proposition 65 page.

Features ?

Automatic float charging: Output 5A @ 12VDC, 3A / 5A @ 24VDC ? Simple, economic design ? For vented lead acid or NiCd cells ? Open-frame design for mounting in a control panel / enclosure ? For stationary engine, genset and standby power applications
The Sentry range provides automatic, current limited and thyristor controlled charging of vented lead acid or NiCd batteries. The units may be used in a wide range of industrial charging applications, including standby engines, pumps and generators.
The charger uses an open frame construction, designed for surface mounting in an enclosed panel. Each unit consists of a transformer, rectifier and control circuit. The control circuit ensures that the charger maintains a battery voltage at the pre-calibrated float level, whilst supplying any additional loads current up to the specified maximum.
Sentry is designed to give a constant current output while battery voltage is below a ‘knee point’ (approx. 13V on a 12V LA). Above the knee-point, as the battery approaches its float voltage, the charger output current ramps down. This multi-stage charge regime gives an optimum combination of fast charge rate, followed by float charge without overcharging.
Electronic self-resetting fuse
An electronic poly-fuse provides protection against DC output reverse polarity and short circuit faults. The fuse automatically resets on battery disconnection, allowing correct reconnection without manual replacement of fuses.
Installation and connection
Electrical connection of the AC supply input and DC output is via spring clamp terminals. Transformer, circuit board and terminal blocks are mounted on an open chassis baseplate/heatsink, designed for surface mounting in an enclosed control panel.
Warranty: a two year limited warranty on materials and workmanship is given with this product, details available on request.

Sentry cd0023 p2/2 issue 4 2015-11-10
Specifications
Power supply
Operating voltage: 110/120V units: 104 – 127 VAC 220/240V units: 207 – 254 VAC Operating frequency: 50/60 Hz.
DC Charge Output
S100
S120
Maximum power output, W
100
120
Nominal voltage, V
12
24
24
Maximum current limit, A
5
3
5
Float / boost voltages
see ‘output calibration’ section
Physical
Operating temperature: –10 to +55°C / +14 to +131°F Dimensions: see Dimensions section
Weights: S100 models: 1.8 kg / 4.0 lb S120 models: 2.6 kg / 5.8 lb Electromagnetic compatibility: EN 50081-2 / EN 50082-2
Dimensions
S700
S7120
Overall:-
H
148 mm / 5.83 in
W
110 mm / 4.33 in
D
117 mm / 4.61 in
125 mm / 4.92 in
Fixing holes:-
X
98.8 mm / 3.89 in
Y
130 mm / 2.95 in
Approximate dimensions for reference only. Use actual product as a mounting template.
For safe heat dissipation, mount product in the orientation shown, with minimum air-gap clearance of 40mm above/below and 25mm at sides.
Electrical connection
Notes: 1) battery output is isolated from chassis. 2) chassis earth stud must be connected AC supply earth.
How to Order
Stock code
Model ref.
Description
42.70.0000
S1001205DLA
Open-frame Sentry, 240VAC, 5A/12VDC
42.70.0002
S1001205CLA
Open-frame Sentry, 120VAC, 5A/12VDC
42.70.0001
S1002403DLA
Open-frame Sentry, 240VAC, 3A/24VDC
42.70.0003
S1002403CLA
Open-frame Sentry, 120VAC, 3A/24VDC
42.70.0004
S1202405DLA
Open-frame Sentry, 240VAC, 5A/24VDC
42.70.0005
S1202405CLA
Open-frame Sentry, 120VAC, 5A/24VDC
Standard chargers above are factory calibrated for vented lead-acid batteries. For other battery types, please specify at order (calibration tables shown right), or contact our technical department for further advice.
Output Calibration
Calibration figures at 20 deg C. Temperature compensation causes output voltage to automatically decrease (or increase) at a rate of 3mV per cell, per °C increase (or decrease) in temperature.
Battery type
float volts (V DC)
boost volts (V DC)
12V
Vented lead acid (6 cells)
13.5
14.1
Calcium-Calcium (6 cells)
13.8
15.6
NiCd (10 cells)
14.1
14.5
24V
Vented Lead acid (12 cells)
27.0
28.2
Calcium-Calcium (12 cells)
27.6
31.2
NiCd (18 cells)
25.6
26.1
NiCd (20 cells)
28.2
29.0

How to Order
Stock code
Model ref.
Description
42.70.0500
S71001205DLA
Open-frame Sentry 7, 240VAC, 5A/12VDC
42.70.0530
S71001205DLAA
As above, plus alarm o/p & boost initiate
42.70.0502
S71001205CLA
Open-frame Sentry 7, 120VAC, 5A/12VDC
42.70.0532
S71001205CLAA
As above, plus alarm o/p & boost initiate
42.70.0504
S71202405DLA
Open-frame Sentry 7, 240VAC, 5A/24VDC
42.70.0534
S71202405DLAA
As above, plus alarm o/p & boost initiate
42.70.0505
S71202405CLA
Open-frame Sentry 7, 120VAC, 5A/24VDC
42.70.0535
S71202405CLAA
Note: Sentry chargers are designed for vented batteries only, and are NOT suitable for VRLA or sealed batteries. If in doubt, contact our technical department
For sales & support, contact:
ENOVATION CONTROLS LTD.

- How to order

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Murphy Instrument Distributor

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