Murphy S10 User Manual

S10 series

The Generator Controls Division of

R

5

6

7

8

battery

high

battery

low

battery

Frank W. Murphy Manufacturer

web: http://www.fwmurphy.com

Frank W. Murphy Southern Division

Frank W. Murphy Ltd.

Murphek Pty. Ltd.

Murphy Switch of California

Murphy de Mexico S.A. de C.V.

Frank W. Murphy Pte, Ltd.
Frank W. Murphy Ltd. en France

AUTOMATIC BATTERY CHARGERS
RATINGS TO 10 AMPS

The S10 is a constant potential, open-chassis battery
charger, suitable for use with either 12V DC or 24V DC,
lead acid or Ni-Cd systems. Although primarily designed
for the diesel generator market, the charger may be
configured for use in a wide range of unattended industrial
applications where standby power is required at all times.

Each unit consists of a transformer, rectifier and control
circuitry. The charger monitors the battery voltage and
delivers as much current as the cells require up to the
current limited maximum, giving a rapid recovery of charge.
Once the battery is fully charged, the charger provides a
low trickle charge to maintain the cells for an indefinite
period at a pre-set float voltage, without overcharging, plus
any additional current required to support a static load.

Also included is a range of on-board fault monitors
complete with volt free relay contacts for remote
alarm signalling.

Standard Features

• Boost function, operated by remote link.

Indication by amber LED.

• Adjustable float and boost voltage levels to meet with

a range of battery types, static loads and operating
conditions. Standard calibrations are:-

BATTERY TYPE FLOAT

VOLTAGE

(V DC)

Lead acid (6 cells) 13.6 14.1

12 V Ni-Cd (9 cells) 12.8 14.0

Ni-Cd (10 cells) 14.2 15.6
Lead acid (12 cells) 27.2 28.4

24 V Ni-Cd (18 cells) 25.6 28.1

Ni-Cd (20 cells) 28.4 31.2

• Adjustable current limit. Standard versions have a

10 Amp limit, but this may be adjusted downwards
where required (e.g. for lower capacity batteries).

• Output short circuit protection.

• Protection against reverse polarity battery connection

via fuse and red warning LED.

• 3 alarm monitoring circuits: 'charge fail', 'low battery

voltage' and 'high battery voltage', complete with
volt-free relay outputs and LED indicators. The low
battery voltage alarm features a fixed time delay of
approx. 60 secs. to inhibit the signalling of a fault
during normal battery loading (e.g. engine cranking).

Electrical connection of the battery, boost and charge
monitoring relays is via ¼" blade terminals. The AC supply
is connected through separately mounted screw terminals.

When ordering, please specify:-

a) Product type (S10 series)
b) Nominal output voltage (12 or 24 V DC)
c) AC supply voltage (240 or 110 V)
d) Battery type (Lead-acid, or Ni-Cd and number of cells,

or special calibration requirements).

BOOST

VOLTAGE

(VDC)

M020301

Issue 5, revised 07/98

Catalogue section 75

Product Specification

Power supply:

operating voltages 240 V AC or 110 V AC (specify),

+/– 10%, 50/60 Hz.

Charging output:

nominal output voltage see chart left
voltage stability +/– 1% of nominal
current limit 1 – 10 Amps, factory set
current stability +/– 2% of nominal

Relay outputs:

charge fail and low battery volts
high battery volts

(ratings for resistive load)

volt free SPNC contacts
volt free SPNO contacts
all rated 5 A @ 30 V DC

General:

operating temperature –10 to +55 oC
overall dimensions (h x l x d) 185 x 145 x 155 mm
weight approx. 8.0 Kg
EMC emission/immunity to EN50081-2/EN50082-2

Connection

F1, fuse type T, rating:

S1012, 240V: 1.5A
110V: 3.15A
S1024, 240V: 3.15A
110V: 6.3A

AC

F1

supply

charge

fail

volts

42

L
N
E

31

BCS

9

10

Boost
switch/timer

volts

Dimensions (mm)

Overall Fixing Base

+
–

Incorporating Modex Automation

Church Road, Laverstock, Salisbury U.K.

Since 1939

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