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10
LOAD
R
C
POWER
LINE
C.1) Relay Outputs
The cable used for relay output wiring must be as far
away as possible from input or communication cables.
Relay output: Protected by varistor.
OUT 1: Form C contact rating of 3 Amps/250 Vac
resistive load.
OUT 2: Form A Contact rating of 2 Amps/250 Vac
resistive load.
Number of operations: 2 x 10
5
at the specified rating.
NOTES:
1) To avoid shock and possible instrument damage,
connect power last.
2) For power connections use 16 AWG or larger wires
rated for 75 °C.
3) Use copper conductors only.
4) Do not run input wires with power cables.
C.2) Inductive Loads
High voltage transients may occur when switching induc-
tive loads. Through internal contacts these transients
may introduce disturbances which can affect the perfor-
mance of the instrument. The same problem may occur
when a switch is used in series with the internal contacts
as shown below.
For all the outputs, the internal protection (varistor)
assures protection up to 0.5 Amp on inductive loads.
It is good electrical practice to install an additional RC net-
work across and as close to the external contacts as
possible.
The value of capacitor (C) and resistor (R) are shown in
the following table.
6
7
C
NO
OUT 2
Class 1
(Alarm)
1
2
3
NO - OUT 1
C - OUT 1
NC - OUT 1
OUT 1
Class 1
daoL
tnerruC
C
(µ )F
R
(Ω)
P
)W(
dnarotsiseR
egatloVroticapaC
Am04<740.00012/1caV062
Am051<1.0222 062caV
pmA5.0<33.0742 062caV
7sl-1-00.p65 9/17/02, 2:39 PM10