1771-2.43, Power Contact Output Module, Installation Data

Power Contact Output Module
Cat. No. 1771-OX
Installation Data
To The Installer
This document provides information on:
important pre–installation considerations
power supply requirements
initial handling procedures
installing the module
connecting the wiring
using the indicators on the module for troubleshooting
replacing a fuse
module specifications
Pre-installation
Considerations
The 1771–OX module contains mercury–wetted relays. Observe the
following caution:
ATTENTION: Handle the module carefully and avoid
excessive vibration. This can cause damage to the glass bulb
which houses the mercury and contacts. Failure to observe this
caution may cause damage to the module’s circuitry.
ATTENTION: You must mount the Power Contact Output
module within 30o of vertical in order for the mercury–wetted
relays to function. Wait 3 minutes and/or operate the relays
manually 16 times before the module is powered–up in an
actual application. Perform this procedure once at initial
installation of the module, and any time the module has been
removed and reinstalled. Failure to do this could result in
improper relay action upon power-up.
Maximum interconnect cable length for this module is 1000 ft. (304.8
meters).
Installation Data
Power Contact Output Module
(Cat. No. 1771-OX)
Power Supply Requirements
The controller or I/O chassis power supply, connected through the
backplane of the I/O chassis, powers the logic circuitry of the contact
output modules. This supply also provides the necessary power to energize
the coils of the module relays. The maximum current drawn from this
supply when all coils are energized is 550mA.
Initial Handling Procedures
When handling the module, observe the following warning:
ATTENTION: Handle the module carefully and avoid
excessive vibration. This can cause damage to the glass bulb
which houses the mercury and contacts. Failure to observe this
caution may cause damage to the module’s circuitry.
Installing Your Module
In this section we tell you how to key your I/O chassis, set the relay output
jumpers, install your module and make your wiring connections.
Keying the I/O Chassis
Use the plastic keying bands, shipped with each I/O chassis, to key your
I/O slots to accept only this type of module. Place the keying bands on the
chassis backplane between:
6 and 8
16 and 18
Slots on the rear edge of the circuit board are matched to these slots to
allow insertion of this type of module. You can key any connector in an I/O
chassis to receive this module except for the leftmost connector reserved
for adapter or processor modules.
Setting the Programming Plugs
You must set the programming plugs before inserting the module into the
1771 I/O chassis. These plugs select either normally–open or
normally–closed circuit configuration. Refer to table A.
Table A
Normally-open and Normally-closed Programming Plug Locations
Output Image Table Bit Address
Module located
in left slot
Module located
in right slot1
0
00
10
JPR 8, 10
JPR 7, 9
1
01
11
JPR 3, 5
JPR 2, 4
2
02
12
JPR 21, 23
JPR 20, 22
3
03
13
JPR 16, 18
JPR 15, 17
1 When using 2slot addressing.
2
Normally-closed
(output relay closes
circuit between output
terminals)
Normally-Open
(output relay opens
circuit between output
terminals)
Module
Output
Installation Data
Power Contact Output Module
(Cat. No. 1771-OX)
The module includes a selectable RC network for switching dc voltages.
When switching these voltages, include the on–board surge suppression by
inserting the program plug on the dc side of the jumpers 6, 11, 19, or 24
(Figure 1 and Table B).
Table B
Ac and Dc Programming Plug Selections
Output
Relay Identification
Jumper (JPR)
0
K1
11
1
K2
6
2
K3
24
3
K4
19
When switching ac voltages, remove the on–board surge suppression by
inserting the programming plug on the ac side of the jumpers. You must
supply an external RC network as close as possible to the load terminals
when switching ac voltages (Table C).
Table C
Suggested External RC Networks for Ac Voltages (Bulletin 500 Motor
Starters)
Starter
Size
Starter
Voltage
Number of
Poles
R (ohms)
C (uF)
Leakage
Current
Electrocube
Part Number
0
120V ac
2-5
68
0.1
8mA
RG 1782-4
0
240V ac
2-5
270
0.027
4.5mA
-
1
120V ac
2-5
68
0.1
8mA
RG 1782-4
1
240V ac
2-5
270
0.027
4.5mA
-
2
120V ac
2-3
68
0.1
8mA
RG 1782-4
2
120V ac
4-5
47
0.1
8mA
RG 1782-3
2
240V ac
2-3
270
0.027
4.5mA
-
2
240V ac
4-5
180
0.047
7.5mA
-
3
120V ac
2-3
47
0.1
8mA
RG 1782-3
3
240V ac
2-3
150
0.047
8mA
-
240V ac
4-5
100
0.1
16mA
RG 1782-6
240V ac
2-3
100
0.1
16mA
RG 1782-6
4
When switching voltages less than 12V (ac or dc) or currents less than
65mA, the RC network may not be needed.
3
Installation Data
Power Contact Output Module
(Cat. No. 1771-OX)
To set any programming plug, proceed as follows:
1.
Remove the 4 screws from the component side cover and remove
cover.
2.
Move the programming plugs to the desired position (Figure 1).
Jumpers are identified by jumper number and use (N.O. or N.C.).
3.
Reinstall the cover on the module.
Figure 1
Programming Plug Locations
JPR 2 JPR 3
NC
NO
JPR 4 JPR 5
DC
AC
JPR 6
K1
K2
Output 1
Output 0
JPR 15 JPR 16
NC
NO
JPR 17 JPR 18
DC
AC
JPR 19
K4
Output 3
JPR 7 JPR 8
NC
NO
JPR 9 JPR 10
DC
AC
JPR 11
JPR 20 JPR 21
NC
NO
JPR 22 JPR 23
DC
AC
JPR 24
K3
Output 2
11911-I
4
Installation Data
Power Contact Output Module
(Cat. No. 1771-OX)
Inserting the Module Into the Chassis
1.
Turn off power to the I/O chassis.
2.
Position the module so that the circuit board on the rear of the module
lines up with the top and bottom card guides in the chassis.
3.
Slide the module into the chassis.
4.
Press firmly to seat the module in the chassis backplane connector.
5.
Swing the module locking latch down into place over the front edge
of the module.
Important: Any time the module is removed or replaced in the I/O
chassis you must wait at least 3 minutes and/or operate the relays manually
16 times before powering up the module. Failure to do so could result in
improper relay action upon power-up.
Connecting Wiring to the Module
You make connections to the module through the field wiring arm cat. no.
1771–WC. The arm pivots on the I/O chassis to connect with terminals on
the front of the module and acts as a terminal strip. The wiring arm allows
the module to be removed from the chassis without disconnecting wiring.
1.
Make certain all power is removed from the module before making
wiring connections.
2.
Swing the wiring arm up into position on the front of the module. The
locking tab on the module will secure it into place.
3.
Make your connections to the field wiring arm as shown in Figure 2.
(Use the label on the front of the wiring arm to identify your wiring.)
ATTENTION: The field wiring arm terminal identification
number is not the same as the number of the bit which controls
that output.
Important: Wait 3 minutes and/or operate the relays manually 16 times
before the module is powered up.
5
Installation Data
Power Contact Output Module
(Cat. No. 1771-OX)
Figure 2
Connection Diagram for the Selectable Contact Output Module (Cat. No.
1771-OX)
Common 0+
A
N.O./N.C. 0-
0
Common 1+
1
N.O./N.C. 1-
2
Not used
3
Not used
4
Common 2+
5
N.O./N.C. 2-
6
Common 3+
7
N.O./N.C. 3-
B
User
Power
Supply
Load
(Actual wiring runs in this direction.)
Interpreting the Status
Indicators
11912-I
The module has 4 status indicators on the module front plate (Figure 3).
These represent the energized/deenergized state of the output relay coils.
On indicates the output relay is energized; off indicates it is deenergized.
You can quickly isolate many types of external hardware–related faults by
comparing these indicators with their corresponding output devices.
Figure 3
Status Indicators
Output 0
Output 1
Output 2
Output 3
Not used
11913-I
6
Installation Data
Power Contact Output Module
(Cat. No. 1771-OX)
Replacing the Fuse
The module has a fuse which opens the output circuit under an overload
condition. To replace the fuse, proceed as follows:
1.
Turn off system power.
ATTENTION: Remove system power before removing or
installing your module in the 1771 I/O chassis. Failure to
observe this warning could result in damage to the module
circuitry and/or undesired operation with possible injury to
personnel.
2.
Pivot the field wiring arm away from the module and remove the
module from the chassis.
3.
Remove the protective cover from the side of the module by
removing the 2 screws.
4.
Replace the fuse with a 7A, 250V 3AG slow blow fuse.
5.
Reinstall the protective cover and insert the module in the chassis.
6.
Reposition the field wiring arm on the module.
7.
Restart system power.
7
Installation Data
Power Contact Output Module
(Cat. No. 1771-OX)
Specifications
4 N.O/N.C.
Outputs per Module
Module Location
1771 I/O chassis
Voltage Rating
0-250V ac rms; 0-175V dc
Current Rating
2A (maximum)
Surge Current
(Repeatable every 10 seconds)
Power Rating
5.5A ac peak for 5 seconds;
6A dc for 5 seconds;
15A dc for 500msec
200VA
Operate/Release Time
On-state Contact Resistance
Signal Delay
10ms maximum
0.25 ohms maximum
10ms on or off
Power Dissipation
2.9 Watts (max.), 2.6 Watts (min.)
Thermal Dissipation
9.9 BTU/hr (max.), 8.9 BTU/hr (min.)
Backplane Current
550mA maximum
Isolation Voltage
Conductors
2500V ac rms
Wire Size
Category
Environmental Conditions
Operating Temperature
Storage Temperature
Relative Humidity
Keying
14 gauge stranded maximum
3/64 inch insulation maximum
11
0 to 60oC (32 to 140oF)
-40 to 85oC (-40 to 185oF)
5 to 95% (without condensation)
Between 6 and 8
Between 16 and 18
Fuse
7A, 250V Type 3AG Slo Blow (1 per circuit)
Field Wiring Arm
Cat. No. 1771-WC
Wiring Arm Screw Torque
79 inchpounds
1 Refer to publication 1770-4.1, Programmable Controller Wiring and Grounding Guidelines.
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Publication
1771–2.43 – August 1992
Supersedes publication 1771–2.43 – June 1990
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