4
WIRING
WIRING CONNECTIONS
AC / DC CONNECTIONS:
NOTE: Connect power only after other connec-
tions are finished. Do not touch the live AC power
terminals. The unit has been designed with an
isolated AC input, therefore polarity is not a con-
cern for the AC power. The chassis is plastic,
therefore earth ground is not used. For DC opera-
tion, cDC to terminal 10 and -DC to
terminal 3.
This Product complies with requirements of the
European Community Directive 89/336/EEC [Elec-
tromagnetic Compatibility]. However, electrical
noise or intense electromagnetic fields in the vicin-
ity of the unit may disturb the microprocessor.
Users should exercise care and should take proper
precautions to avoid microprocessor disturbance.
Four common sources of noise are:
1) AC power line noise- The input power lines
should not be common to power lines for motors,
pumps, contactors, etc. If the unit cannot be con-
nected to an electrically clean power source, an
inductive load suppressing device (MOV as
GE#V130LA1 or Resistor Capacitor as Paktron#
.2uf/220 ohm @ 400V) can be installed. Although
locating the suppressor across the AC supply at
the unit should help, best results are obtained by
connecting the suppressor across the leads of the
"load" at the device causing the spikes.
2) Input line noise- The noise is carried on the input
and DC ground lines. Make sure the input wires
are not run into the unit in a bundle with power input
lines. We recommend using shielded cable. Con-
nect the shield to DC ground of the unit and "earth"
at one point in the circuit preferably at the DC
ground terminal of the unit.
3) Output lines- The unit has two open collector
outputs and two optional relay outputs. When
these outputs are used to run external relays or
solenoids, spikes can be generated upon activa-
tion. This noise can spread through the instrument
causing operating problems. If the source is a D.C.
operated device, a general purpose diode (IN4004)
placed across the solenoid prevents electrical
noise spikes. Connect the cathode (banded side)
to the more positive side of the coil. If the source
is an A.C. operated device, use a Resistor Capaci-
tor or MOV across the coil.
4) 24 VDC output supply- Noise can be generated
on the 24 VDC output supply if it is used to drive
inductive loads or if the current draw exceeds
50mA. Insure that all inductive loads have a diode
(such as IN4004) across the coil and that the
current does not exceed 50mA.
REAR VIEW
1 2 3 4 5 6 7 8 9 10 11 12
13 14 15 15 17 18
RESET IN
ANALOG OUT (SINK)
SIGNAL GND (-DC)
(CURRENT) +I IN
(VOLTAGE) +V IN
NOT USED
+24V OUT
PRESET B COLLECTOR
PRESET A COLLECTOR
+D.C. IN
110 / 220 VAC
110 / 220 VAC
10
11
12
1
2
3
4
5
6
7
8
9
RELAY B
RELAY A
13
14
15
16
17
18
COMMON
N.C.
N.O.
COMMON
N.C.
N.O.
!
Summary of Contents for INT-69R
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