B) Logic Input (for models with RS-485 only)
This input is used for remote acknowledgement (reset).
Safety note:
-Do not run logic input wiring with AC power cables.
-Use an external dry contact capable of switching 0.5 mA, 5 Vdc.
-The instrument needs 100 ms to recognize a contact status variation.
-The logic inputs are NOT isolated from the measuring input.
Logic input
14
C.1) Relay Outputs
OUT 1 
1
Class 1 | 2 |
| 3 |
OUT 2 | 6 |
Class 1 |
|
(Alarm) |
|
| 7 |
Fig. 8 |
|
NO - OUT 1
C - OUT 1
NC - OUT 1
C
NO
15
Fig.7
The OUT 1 contact rating is 3A/250V AC on resistive load.
The OUT 2 contact rating is 2A/250V AC on resistive load.
The number of operations is 1 x 105 at specified rating.
NOTES 1) To avoid electric shock, connect power line at the end of the wiring procedure.
2)For power connections use No 16 AWG or larger wires rated for at last 75 °C.
3)Use cupper conductors only.
4)Don’t run input wires with power cables. All relay contacts are protected by varistor against inductive load with inductive component up to 0.5 A.
The following recommendations avoid serious problems which may occur, when relay outputs are used with inductive loads.
5
5 | 19/04/2004, 15.07 |