Specifications

FWMurphy – AS731 / AS732 installation section A: panel installation and wiring mi6128 revision G 10
th
Sept 2007 p2/6
Anti-static precautions
The AS731/732 features sensitive electronic components
that may be damaged by static discharge. Anti-static
precautions must therefore be observed when storing,
unpacking and handling:-
• Store the unit in the anti-static bags supplied
• Use earthed wrist straps and anti-static mats when
handling and during installation.
• Handle the unit by its external plastic casing. Except
for connection purposes, avoid direct physical
contact with the electrical connectors.
Unpacking
For each unit ordered, the following is supplied:-
• 1 x AS731 or AS732 module (model reference as listed
on the rear label), including:-
¾ 2 x removable terminal blocks at the rear
¾ 2 x mounting clamps (one on each side of the case)
¾ on AS732 units, 1 x network terminator module
inserted into one of the RS485 ports.
• These installation instructions
Optional communication accessories include:-
• Model AS7CP, RS232 local (null modem)
communication lead, RJ11 to 9 way D type.
• Model AS7CQ, 9 way to 25 way D type adaptor,
for use with AS7CP.
• Model AS7CR, RS232 modem communication lead,
RJ11 to 25 way D type.
Product specification
Power supply:
Operating voltage: steady state range
crank brown-out
5 – 40 V DC continuous
to 0 V for >=100mS
Current consumption: standby (typ)
cranking (typ)
95mA @ 12V, 55mA @ 24V
280mA @ 12V, 170mA @ 24V
Inputs:
DC inputs:-
positive input defined as: 80% to 100% of battery positive
negative input defined as: –1V to +2V w.r.t. battery negative
Inputs 1 and 2 (oil pressure and
engine temperature)
switch (open or closed) or
analogue (Murphy, Datcon, VDO
5 or 7 bar), wired to negative DC
Inputs 3 – 5 open or closed to negative DC
Generator AC:-
operating voltage range 3 phase, 90 – 300 V AC rms L–N
gen. volts display resolution 1 VAC
gen. frequency measurement range 0 – 99 Hz.
gen. frequency display accuracy <= 2% of full scale
gen. frequency display resolution 1 Hz.
Magnetic pickup:
operating voltage range 2.5 – 25 V AC rms
frequency measurement range 0 – 10 kHz.
engine RPM display accuracy <= 2% of full scale
engine RPM display resolution 10 RPM
AC current sensing inputs:
operating range designed for use with 5 Amp CT's
primary ratings 10 to 5000 Amps
Outputs: (all ratings for resistive load)
Start and fuel relays positive DC (switched relay)
rated 16 A max. @ 24 V DC
Programmable output 1
(default setting: gen. contactor)
volt free SPNO relay
5 A max. @ 240 V AC
Programmable outputs 2 – 4 negative DC (semiconductor)
500 mA max. @ 33 V DC
Communications:
RS232 port connector RJ11
RS232 Baud rate 9600
RS232 max. lead length 10 metres
RS485 port connector 2 x RJ45
RS485 Baud rate 9600
RS485 maximum network length 1000 metres
RS485 protocol MODBUS RTU
Physical:
Overall dimensions (W x H x D) 144 x 96 x 162 mm
Panel cut-out size (W x H) DIN standard 140 x 92 mm
Weight approx. 770 g
Operating ambient temperature –10 to +55
o
C
GENERAL INFORMATION (cont.)
Product Discontinued