To install the I/O Module Board: 1. Remove AC power from decoder.

     

 

(Catalog Number 2755-NB0, -NB1, -NB2)

This document shows how to install the following components in the 2755-DSxx➀ and 2755-DDxx➀ Bar Code Decoders.

•

I/O Module Board (Catalog No. 2755-NB1 and -NB2).

•

I/O Connector and Cables (Catalog No. 2755-NB0).

•

I/O Modules supplied with Catalog No. 2755-NB2. The I/O

modules are also available as separate catalog numbers as shown on page 2.

This section shows how to install the I/O Module Board (Catalog No. 2755-NB1 and -NB2) in the decoder. Refer to Figure 1 during installation.

To install the I/O Module Board: 1. Remove AC power from decoder.

!

ATTENTION: Remove power from decoder before

installing the I/O Module Board. Failure to do so could result in personal injury.

!

ATTENTION: ESD (Electrostatic Discharge) may

cause damage to electronic equipment. Take standard precautions to minimize the possibility of an

electrostatic discharge when installing this option.

2. Loosen the two cover screws and open decoder cover.

3. Locate the four metal standoffs and one plastic support standoff

on the logic board. Also locate the connector on the logic board labeled CON9 DISCRETE I/O. Align the I/O Board so that the connector strip is positioned over CON9 DISCRETE I/O.

4. Place the I/O Module Board over the standoffs so that the plastic

center support snaps into the center hole on the I/O Board. Press down firmly.

➀

Catalog numbers are incomplete. The 2755-DS and -DD decoders are available in different configurations.

Installing I/O Module Board

5. Fasten the four corners of the I/O Board using the (4) #6-32

screws supplied. Tighten to a torque of 11 ±2 in-lbs.

6. Insert the connector end of the flat cable into the CON9

DISCRETE I/O connector on the logic board and press firmly until seated. Figure 1 ÍÍÍÍÍÍÍ ÍÍÍÍÍÍÍ ÍÍÍÍÍÍ ÍÍÍÍÍÍ ÍÍ ÍÍ

Optional LCD Display CON9 Discrete I/O I/O Module Board

Plastic Center Post #6-32 Mtg. Screws (4)

Catalog No. 2755-NB2 is supplied with (2) DC output modules and (1) DC input module. The specifications for these modules is shown in the tables below. For details on how to install the modules in the I/O Board, see the section on Installing I/O Modules.

Maximum Voltage Minimum Voltage

Maximum Peak Off State Voltage Maximum Peak Off State Leakage Maximum On-State Current Minimum On-State Current

60 VDC 3.0 VDC 60 VDC 1.0 mA 0.5 A DC 10 mA DC Catalog Number 2755–0B5S

Maximum Input Voltage Minimum Line Voltage Input Resistance Maximum Input Current Drop Out Current

Allowable Off-State Input Current Allowable Off-State Input Voltage

32 VDC 3.3 VDC 1 k ohm 32mA DC @32VDC 1.0 mA DC 1.0 mA DC 2.0 VDC

Catalog Number 2755–IB5S

Maximum 1 Second Surge Peak On-State Voltage

1.5 A DC 1.5 V DC

(2) DC Output Modules

(functions as a switch not as a power source)

(1) DC Input Module

For details on the availability of other I/O modules, see decoder User Manual.

This section shows how to install the Catalog No. 2755-NB0 I/O Connector in the decoder. Refer to Figure 2 during installation.

The Catalog No. 2755-NB0 I/O Connector is shipped with:

•

Connector

•

Washer

•

Cable (6 foot/1.83 meter)

•

Nut

Note: The connector wires to the I/O Module Board. See the Wiring

I/O Modules section for details.

To install the I/O Connector: 1. Remove AC power from decoder.

!

ATTENTION: Remove power from decoder before

installing the I/O Connectors. Failure to do so could result in personal injury.

!

ATTENTION: ESD (Electrostatic Discharge) may

cause damage to electronic equipment. Take standard precautions to minimize the possibility of an

electrostatic discharge when installing this option.

2. Loosen the two cover screws and open decoder cover.

3. Remove the plug from one of the I/O module wiring holes on the

decoder enclosure.

–

For a NEMA Type 1 enclosure, squeeze the two tabs inward while pushing the plug out from the inside.

–

For a NEMA Type 4 enclosure, push outward with your finger

on the center of the plug while pressing down on the inside lip of the plug.

Installing I/O Connector

(Catalog No. 2755-NB0)

4. Remove I/O Connector and parts from the package.

5. Slip the rubber washer over the wires and down over the threads

to the flange on the connector.

6. Insert the wire end of the connector into the I/O module wiring

hole of the decoder until the washer and connector flange are seated against the outside of the enclosure.

7. Slip the lock nut over the end of the wires and tighten the lock nut

to a torque of 70-100 in-lbs while holding the connector.

!

ATTENTION: Torque the lock nut only. Do not

torque the connector itself.

Figure 2 Locknut Washer Washer I/O Connector I/O Connector Locknut Washer I/O Connector

I/O Module Wiring Holes

Switch and Power Connector Area

Locknut

This section shows how to wire the cables of the I/O Connector (Catalog No. 2755-NB0) to the I/O modules. Refer to Figure 3 during installation.

Below each module position on the I/O board is a terminal block connector which accepts up to 12 gauge wire.

To wire each output module:

1. Strip 1/4 inch of the insulation from cable wires (removing

wire particles).

2. Loosen terminal screws on pull-apart connector.

For easier installation, remove connector from the I/O board by gently lifting the connector.

3. Insert wires into connector. Note polarity on module connectors when installing DC modules.

4. Tighten terminal screws on connector to secure the wires. 5. Replace pull-apart connector (if removed from I/O board).

Figure 3

MOD2 MOD3 MOD4 MOD6 MOD7 MOD8

– 1 + MOD1 – + 12 V DC Washer I/O Connector Locknut Locknut – 2 + – 3 + – 4 + MOD5 – 5 + – 6 + – 7 + – 8 + F 5 F 6 F 7 F 8 F 1 F 2 F 3 F 4 – 1 + – 2 + – 3 + – 4 + BLUE ORANGE WHITE/BLACK WHITE BLACK RED GREEN RED/BLACK BLUE ORANGE WHITE/BLACK WHITE BLACK RED GREEN RED/BLACK – 5 + – 6 + – 7 + – 8 +

I/O Connector Wiring

Washer Orange Blue White/Black Black White Red Green Red/Black Wire Color Pin # Left Right 1– 1+ 2– 2+ 3– 3+ 4– 4+ 6– 6+ 7– 7+ 5– 5+ 8– 8+ Recommended Wiring

I/O Board _{I/O Modules}

Hold Down Screws Module Pull-Apart Connectors (8)

MOD8 accepts input or output module

12V DC Power Source 100mA Max

This section shows how to install I/O modules. Refer to Figure 3 during installation.

The 2755-NB2 I/O Board is supplied with (2) DC output modules and (1) DC input module. Figure 3 shows the output modules installed in positions MOD1 and MOD2. The input module is installed in position MOD8.

To install modules in the I/O board: 1. Remove AC power from decoder.

!

ATTENTION: Remove power from decoder before

installing the I/O Modules. Failure to do so could result in personal injury.

!

ATTENTION: ESD (Electrostatic Discharge) may

cause damage to electronic equipment. Take standard precautions to minimize the possibility of an

electrostatic discharge when installing I/O modules.

2. Loosen the two cover screws and open decoder cover.

3. Plug module into MOD position on I/O board. Carefully align

module pins over sockets in board before inserting module.

Note: Module pins must puncture the silicon seal of the I/O board

sockets.

4. Tighten the hold-down screw to secure module in position.

Allen-Bradley, a Rockwell Automation Business, has been helping its customers improve productivity and quality for more than 90 years. We design, manufacture and support a broad range of automation products worldwide. They include logic processors, power and motion control devices, operator interfaces, sensors and a variety of software. Rockwell is one of the world’s leading technology companies.

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