Chromalox TEMPERATURE CONTROLLER 1604-7 - Manual (Page 8)

5
B) LOGIC INPUT
Safety note:
1) Do not run logic input wiring together with
power cables.
2) Use an external dry contact capable of
switching 0.5 mA, 5 V DC.
3) The instrument needs 100 ms to recognize a
contact status variation.
4) The logic inputs are NOT isolated by the
measuring input
Fig. 7 - LOGIC INPUT WIRING
This logic input allows to select the operative set
point.
logic input op. set point
open SP
close SP2
C) RELAY OUTPUTS
Fig. 8 RELAY OUTPUTS WIRING
The contact rating of the OUT 2, 3 is 2A/250V AC
on resistive load.
The number of operations is 1 x 10
5 at specified
rating.
NOTES 1) To avoid electrical 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 copper conductors only.
4) Don’t run input wires together with
power cables.
The 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 using relay
output for driving inductive loads.
14
SP / SP2
15
2
1
3
NO - OUT 3
NO - OUT 2
C - OUT 2 and 3
OUT 2
OUT 3
1604-7-1-AB.p65 5/16/00, 10:50 AM 5