DC (10-30V) Input Module
Cat. No. 1771-IVN
Installation Data
To The Installer
This document provides information on:
important pre–installation considerations
power supply requirements
installing the module
connecting the wiring
using the indicators on the module for troubleshooting
module specifications
Pre-installation
Considerations
The 1771–IVN DC input module is a source input and requires a sink
output. A source input provides a positive voltage path and a sink output
provides a path to ground.
You must use this module in a series B 1771 I/O chassis. Refer to the table
below for processor compatibility.
Table A
Processor Compatibility Chart
System Type
Use with Processors:
Local
Mini-PLC-2/02 (cat. no. 1772-LZ, -LZP)
Mini-PLC-2/16 (cat. no. 1772-LX, -LXP)
Mini-PLC-2/17 (cat. no. 1772-LW, -LWP)
PLC-5/15, Series B and later (cat. no. 1785-LT)
Remote (with a 1771-ASB PLC-2/20 (cat. no. 1772-LP2)
remote I/O adapter)
PLC-2/30 (cat. no. 1772-LP3)
PLC-3 (cat. no. 1775-L1, -L2, -L3, -L4)
PLC-3/10 (cat. no. 1775-LP4, -LP8)
PLC-5/15, Series B and later (cat. no. 1785-LT)
Installation Data
DC (10 - 30V) Input Module
(Cat. No. 1771-IVN)
Do not place this module in the same I/O chassis as the 1771–IX
thermocouple module. You can use this module in the same chassis as the
1771–IXE thermocouple module.
This module has input filtering to limit the effects of voltage transients
caused by contact bounce and/or electrical noise. Specifications for input
filtering are listed in the specifications at the end of this document.
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 DC input
module. The maximum current drawn from this supply is 280mA.
Installing Your Module
In this section we tell you how to initially handle your module, key your
I/O chassis, install your module and make your wiring connections.
Initial Handling Procedures
ATTENTION: Remove power from the 1771 I/O chassis
backplane and wiring arm before removing or installing an I/O
module.
Failure to remove power from the backplane or wiring arm
could cause module damage, degradation of performance, or
injury.
Failure to remove power from the backplane could cause
injury or equipment damage due to possible unexpected
operation.
The input module contains components which can be damaged by
electrostatic discharge. The module is shipped in an electrostatic shielded
bag for protection. Follow the handling procedures outlined below to guard
against damage to your module.
Touch a grounded object to discharge yourself before handling the
module.
Do not touch the backplane connector or connector pins.
If you configure or replace internal components, do not touch other
circuit components inside the module. If available, use a static–safe
work station.
When not in use, keep the module in its static–free shield bag.
2
Installation Data
DC (10 - 30V) Input Module
(Cat. No. 1771-IVN)
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:
14 and 16
30 and 32
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.
Inserting the Module Into the Chassis
1.
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.
2.
Slide the module into the chassis.
3.
Press firmly to seat the module in the chassis backplane connector.
4.
Swing the module locking latch down into place over the front edge
of the module.
Connecting Wiring to the Module
You make connections to the module through the field wiring arm cat. no.
1771–WN. 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 1.
(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.
3
Installation Data
DC (10 - 30V) Input Module
(Cat. No. 1771-IVN)
I/O Module Groups
Each module condenses 2 full module groups (32 inputs) into each I/O
chassis slot. For example:
Module group 1 = inputs 00 through 17
Module group 2 = inputs 00 through 17 (module group 2
represents the second set of inputs).
In figure 1, terminals 1 through 20 represent module group 1, with
terminals 1, 2, 11 and 12 10–30V DC power. Terminals 21 through 40
represent module group 2, with terminal 21, 22, 31 and 32 DC power.
Figure 1
Connection Diagram for the 1771-IVN DC Input Module
(See applicable codes and laws.)
–
+
2-Wire
Devices
–
-
DC
Supply
–
Input 01
4
Input 03
6
10-30V DC
Input 11
+
3-Wire
Devices
2
Input 05
Input 07
DC
Supply
–
10-30V DC
-
8
10
12
14
Input 13
16
Input 15
18
Input 17
20
10-30V DC
Input 01
22
Input 03
Input 05
Input 07
26
10-30V DC
32
Input 11
34
Input 13
Input 15
36
Input 17
40
24
28
30
38
10-30V DC
Input 00
Input 02
Input 04
Input 06
10-30V DC
Input 10
Input 12
Input 14
Input 16
10-30V DC
Input 00
Input 02
Input 04
Input 06
10-30V DC
Input 10
Input 12
Input 14
Input 16
Note: Terminals on the left are even
numbered (2 thru 40) , and terminals on
the right are odd numbered (1 thru 39).
(Actual wiring runs in this direction.)
4
10433-I
Installation Data
DC (10 - 30V) Input Module
(Cat. No. 1771-IVN)
ATTENTION: Observe proper polarity with Ddc power
connections. Reverse polarity, or application of ac voltage could
damage the module.
Table B
Module Input Terminal Assignments
Terminal
Number
Input Assignment
I/O program address
Terminal
Number
Input Assignment
I/O program address
01
1 10 to 30V DC
-
21
1 10 to 30V DC
-
02
10 to 30V DC
-
22
10 to 30V DC
-
03
Input 00
1RG00
23
Input 00
1RG00
04
Input 01
1RG01
24
Input 01
1RG01
05
Input 02
1RG02
25
Input 02
1RG02
06
Input 03
1RG03
26
Input 03
1RG03
07
Input 04
1RG04
27
Input 04
1RG04
08
Input 05
1RG05
28
Input 05
1RG05
09
Input 06
1RG06
29
Input 06
1RG06
10
Input 07
1RG07
30
Input 07
1RG07
11
1 10 to 30V DC
-
31
1 10 to 30V DC
-
12
10 to 30V DC
-
32
10 to 30V DC
-
13
Input 10
1RG10
33
Input 10
1RG10
14
Input 11
1RG11
34
Input 11
1RG11
15
Input 12
1RG12
35
Input 12
1RG12
16
Input 13
1RG13
36
Input 13
1RG13
17
Input 14
1RG14
37
Input 14
1RG14
18
Input 15
1RG15
38
Input 15
1RG15
19
Input 16
1RG16
39
Input 16
1RG16
20
Input 17
1RG17
40
Input 17
1RG17
Where:
R = rack number (1, 2, 3, etc.)
G = I/O group (0 - 7)
1 You can connect a different power supply to each pair of 10-30V dc terminals (01/02, 11/12, 21/22, 31/32). Each pair of
terminals is independent of the others. Terminals 01/02 supply terminals 03 thru 10; 11/12 for 13 thru 20; 21/22 for 23 thru 30;
and 31/32 for 33 thru 40.
5
Installation Data
DC (10 - 30V) Input Module
(Cat. No. 1771-IVN)
Interpreting the Status
Indicators
The module has 32 status indicators on the module front plate. These
represent the control status of the inputs. Each indicator is lit when voltage
is present at the corresponding input.
Figure 2
Status Indicators
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
Status Indicators (red)
10434-I
6
Installation Data
DC (10 - 30V) Input Module
(Cat. No. 1771-IVN)
7
Installation Data
DC (10 - 30V) Input Module
(Cat. No. 1771-IVN)
Specifications
Inputs per module
32
Module Location
1771-A1B thru -A4B I/O Chassis
Input Voltage Range (+dc)
10 to 30V dc
Nominal Input Current
4.5mA @ (+dc - 10V dc)
Minimum Off-state Current
1.7mA @ (+dc - 5V dc)
Maximum Off-state Voltage
(+dc - 5V dc)
Minimum Onstate Voltage
(+dc - 10V dc)
Input Impedance
2.2K
Input Signal Delay
Low to high propagation: 6ms(+2ms)
High to low propagation: 6ms(+2ms)
Power Dissipation
15.6W (max); 1.5W (min)
Thermal Dissipation
53.3 BTU/hr (max); 5.1 BTU/hr (min)
Backplane Current
280mA @ 5V dc maximum
Isolation Voltage
Conductors
Wire Size
1500V ac RMS
Category
14 gauge stranded (max)1
3/64 inch insulation (max)
Category 12
Environmental Conditions
Operational Temperature
Storage Temperature
Relative Humidity
0o to 60oC (32o to 140oF)
-40o to 85oC (-40o to 185oF)
5 to 95% (without condensation)
Keying
Between 14 and 16
Between 30 and 32
Field Wiring Arm
Wiring Arm Screw Torque
1
1771WN
79 inchpounds
14 gauge wire connected to all terminals may not allow the cover on the field wiring arm to close.
2A smaller gauge wire may be used.You use this conductorcategory information for planning conductor routing as
described in the systemlevel installation manual.
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8
Publication
1771–2.169 – June 1990
Supersedes publication 1771–2.115 – July 1987 and 1771–2.115–DU1 – November 1987
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