EnOcean PTM 240C, User Manual

Page: 8 / 11

USER MANUAL V1.01
EnOcean GmbH
Kolpingring 18a
82041 Oberhaching
Germany Phone +49.89.67 34 689-0
Fax +49.89.67
34 689-50
info@enocean.com
www.enocean.com
Subject to modifications
PTM 240C User Manual V1.01
September 26, 2008 4:13 PM
Page 8/11
PTM 240C
2.4 Energy Pulse Requirements
The energy pulse hat to fulfill the following requirements:
ƒ
E
Pulse
> 0.25mWs
ƒ
U
min
=0V
ƒ
2.5V ≤ U
max,Pulse
≤ 5.5V
ƒ
0.3ms ≤ T
Pulse
≤ 25ms
Please make sure to use right polarity as specified in section 2.2!
Otherwise the module may transmit only 2 subtelegrams.
The required pulse width depends on voltage, pulse shape and source impedance.
The figure below shows how the required pulse length changes for a rectangular pulse as a
function of the open circuit voltage. The measurement has been performed with a source
impedance of 0.25 Ohm.
0
5
10
15
20
25
30
35
2.5 3.0 3.5 4.0 4.5 5.0 5.5
open circuit voltage at 0.25 Ohm source-impedance [V]
pul
s
e
l
e
ng
th [ms
]