HIMA HIMatrix H 7033 - H 7033 Operation; Monitoring Transmitter Supply Voltage UTM

HI 800 417 BEA HIMatrix H 7033
7 of 10
1.2 Operation
To operate the H 7033, set the following parameters:
• In ELOP II Factory/SILworX, set transmitter supply of the module MI 24 01
MI[xx].Transmitter Used to "FALSE".
• Set the power supply (L+) H 7033 to the following value:
L+ = U
Tmin
+ I
T
x R
wire
+ 4 V, U
Tmin
= minimum transmitter supply voltage
• Use the IMIH terminal if the filtered input signal of the three-wire transmitter should
be used.
1.2.1 Monitoring of the Transmitter Supply Voltage U
TM
To monitor the transmitter supply voltage U
TM
, connect the analog input of the MI 24 01
module to the SM and L- terminals. The transmitter supply voltage U
TM
is monitored via the
current I
MI24
, see the following formulas:
I
MI24
= U
TM
/ 3200 Ω
U
TM
= U
Tmin
+ I
T
x R
wire
+ U
Fuse 500 mA
+ Tolerance
Example:
U
Tmin
= 24V, I
T
= 200 mA, R
wire
= 5 Ω, U
Fuse 500 mA
= 0.4 V, Tolerance = 0.9 V
I
MI24
= (24 V + 1 V + 0.4 V + 0.9 V) / 3200 Ω
I
MI24
= 8.22 mA
The input current of MI 24 01 must not fall below 8.22 mA.
The module MI 24 01 checks the transmitter supply voltage U
TM
. If U
TM
is less than the
minimum transmitter operating voltage U
Tmin
, the signals from the connected transmitter may
no longer be classified as safe.