Pulse Inputs - Landis+Gyr ULTRAHEAT T450 Technical Description

Pulse inputs

10 Pulse inputs
Note: The pulse inputs need to be activated via UltraAssist.
Note: It is recommended to use the pulse input set T45-PULSE-
IN for the connection.
The meter has 2 pulse inputs enabling the determination in number of external
volume pulses which can be generated, for example, by a cold water meter
and / or a hot water meter.
The pulse inputs can be output via the 868 MHz radio module, the M-Bus
module or the optical interface.
The meter readings of the pulse inputs are also indicated on the LCD.
Standard
Max. cable length
External connection
Max. power
Maximal pulse fre-
quency
Minimal pulse length
Polarity
Class IB / IC according to EN 1434-2
10 m
Open Drain
Pulse input 1: signal on terminal 65, mass on ter-
minal 66
Pulse input 2: signal on terminal 67, mass on ter-
minal 68
Max. 3 μA
2 Hz
Min. 10ms
Active low
24/36