Specifications are subject to change without notice (28.10.05)
1
Product Description
Ordering Key
DHA51 is a fully pro-
grammable timer to allow
execution of self-designed
timing functions. The func-
tion can be prepared using
the free PC software BHF
and connecting the unit to
the PC.
For mounting on DIN-rail.
17.5 mm wide housing suit-
able both for back and front
panel mounting.
Fully programmable timing unit
The function is designed with the BHF PC software
Waveform design capability:
up to 32 status changes
each status time range 0.1 s to 100 h
programable trigger input event
Full reprogrammability of the timing functions
Repeatability:
0.2%
Output: 5 A SPDT relay
For mounting on DIN-rail in accordance with DIN/EN 50 022
17.5 mm DIN-rail housing
Combined AC and DC power supply
LED indication for relay status and power supply ON
Output
SPDT relay
Rated insulation voltage
250 VAC (rms)
Contact Ratings (AgSnO
2
)
Resistive loads
AC 1
5 A @ 250 VAC
DC 12
5 A @ 24 VDC
Small inductive loads AC 15
2.5 A @ 250 VAC
DC 13
2.5 A @ 24 VDC
Mechanical life
30 x 10
6
operations
Electrical life
10
5
operations
(at 5 A, 250 V, cos
= 1)
Operating frequency
< 7200 operations/h
Dielectric strength
Dielectric voltage
2 kVAC (rms)
Rated impulse withstand
voltage
2.5 kV (1.2/50 s)
Output Specifications
Type Selection
Housing
Function
Type
Item number
Output
Power supply
Time steps
Mounting
Output
Housing
Time steps
Supply: 24 VDC and 24 to 240 VAC
DIN-rail
SPDT
Mini-D
8 steps
DHA 51 C M24 S8
DIN-rail
SPDT
Mini-D
16 steps
DHA 51 C M24 S16
DIN-rail
SPDT
Mini-D
32 steps
DHA 51 C M24 S32
Time Specifications
Time ranges
each step
0.1 to 1 s
1 to 100 s
6 to 600 s
60 to 6000 s
0.1 to 10 h
1 to 100 h
Setting accuracy
0.1% +/- 10 ms of the set
value for each step
Repeatability
0.2%
Time variation
Within rated power supply
0.05%/V
Within ambient temperature
0.2%/C
Reset
Manual reset of time
Close the trigger contact
and/or relay
between pins A1 and Y1
Pulse duration
100 ms
Power supply interruption
200 ms
Timers
Fully programmable
Type DHA51
DHA 51 C M24 S8
2
Specifications are subject to change without notice (28.10.05)
DHA51
Power ON delay
100 ms
Indication for
Power supply ON
LED, green
Output relays ON
LED, yellow
(flashing when timing)
Environment
(EN 60529)
Degree of protection
IP 20
Pollution degree
2 (IEC 60664)
Operating temperature
-20 to +60C, R.H. < 95%
Storage temperature
-30 to +80C, R.H. < 95%
Housing dimensions
17.5 x 81 x 67.2 mm
Weight
75 g
Screw terminals
Tightening torque
Max. 0.5 Nm according to
IEC EN 60947
Approvals
UL, CSA
CE Marking
Yes
EMC
Electromagnetic Compatibillity
Immunity
According to EN 61000-6-2
Emission
According to EN 61000-6-3
General Specifications
Power supply
Overvoltage cat. II
Rated operational voltage
(IEC 60664, IEC 60038)
through terminals A1, A2
24 VDC 15% and
24 to 240 VAC + 10% -15%,
45 to 65 Hz
Voltage interruption
10 ms
Rated operational power
1.5 W
Supply Specifications
T-RUN PCABLE/PCABLEII
(optional):
Connected to the parallel
port of your Personal Com-
puter allows complete pro-
gramming of function and
timing for the unit using the
software BHF.
Function/Time Setting
T-RUN PCABLE/PCABLEII
(optional):
To be connected to the
parallel port of your per-
sonal computer.
BHF software:
to be
downloaded from the
CARLO GAVAZZI site fol-
lowing the links for soft-
ware download. See
www.carlogavazzi.com
Accessories
Mode of Operation
With DHA51 it is extremely
simple to obtain self-
designed timing functions
just preparing two diagrams
with the PC configuration
sofware BHF: one describ-
ing what happens at power
on and one at the trigger
(closing or opening). This
allows a variety of applica-
tion that only fantasy is able
to determine.
After preparing the function
on the PC it is enough to
connect the T-RUN PCABLE
to the plug and program the
unit. DHA51 becomes your
self-customized timer with
exactly the function you
needed. Refer to BHF soft-
ware for more information.
Example 1:
Setting a 3-blinks function
plus a start activity.
As soon as the power sup-
ply is applied three pulses
are executed. Each one is
separated by the following
one by one second and the
duration is respectively 4, 3,
and 2 s. Closing the trigger
contact causes the three 1 s
pulses. In every case, after
finishing the planned
sequence, the unit waits for
the new trigger. In case of
trigger event before finishing
the power on sequence, the
trigger sequence starts.
Example2:
Shifting trigger
At the power on a single
pulse is programmed as
acknowledge. In this case
both the closing and open-
ing events of the trigger are
recordered. The output is
the same event as the trig-
ger delayed of the predeter-
mined period of time. Every
new trigger activity is shifted
to the output.
Additional load
It's possible to wire an addi-
tional load (i.e. a relay)
between pins Y1 and A2,
driven by the trigger contact
without damaging the
device.
Relay ON: See operation
diagrams
Note 1:
The power supply voltage
MUST be switched OFF
while the modular plug is
connected to the unit.
Note 2:
DHA51 can be repro-
grammed (e.g.: in case of
change of function or during
the testing phase) several
times using every time the
same procedure.
Note 3:
The above examples are just
small instances to show
how easy is to obtain more
and more nice and useful
functions using DHA51.
Specifications are subject to change without notice (28.10.05)
3
Operation Diagrams
DHA51
Example 1: power on sequence
Example 1: trigger sequence
Example 1: activity
Example 2: power on sequence
Example 2: trigger sequence
Example 2: activity
Power ON
Power supply
Trigger input
Relay ON
LED
Wait for trigger
Trigger
Wait for trigger
Power ON
Power supply
Trigger input
Relay ON
LED
Wait for trigger
Trigger
Wait for trigger
End of trigger
ON
OFF
ON
OFF
Wiring Diagram
67.2
18.7
45
17.5
81
2
Dimensions
PDF 
ZIP