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MULTICAL® 803
Kamstrup A/S · Technical description · 5512-2360_A1_GB_02.2019
43
Below, the requirements for pulse duration and pulse frequency for meters connected to the pulse inputs are
specified:
Pulse inputs A and B
In-A 65-66 and In-B: 67-68 via module
Electronic switch
Reed switch
Pulse input
680 k
Ω
pull-up to 3.6 V 680 k
Ω
pull-up to 3.6 V
Pulse ON
<
0.4 V i
>
30 ms
<
0.4 V i
>
500 ms
Pulse OFF
>
2.5 V i
>
30 ms
>
2.5 V i
>
500 ms
Pulse frequency
<
3 Hz
<
1 Hz
Electrical isolation
No
No
Max cable length
25 m
25 m
Requirements to external
contact
Leak current at open contact
<
1
µ
A
Update of display
Follow the selected integration interval (from 2 to 64 s)
The pulse inputs are placed on the module with the following terminal numbering:
Connected meter
MULTICAL® 803
Input A1/A2:
Connection
terminals
65-66
Input B1/B2:
Connection
terminals
67-68