Description

This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as defined in IEC publication 60664–1), at altitudes up to 2000 meters without derating. This equipment is considered Group 1, Class A industrial equipment according to IEC/CISPR Publication 11. Without appropriate precautions, there may be potential difficulties ensuring electromagnetic compatibility in other environments due to conducted as well as radiated disturbance. This equipment is supplied as “open type” equipment.

It must be mounted within an enclosure that is suitably designed for those specific environmental conditions that will be present, and appropriately designed to prevent personal injury resulting from accessibility to live parts. The interior of the enclosure must be accessible only by the use of a tool. Subsequent sections of this publication may contain additional information regarding specific enclosure type ratings that are required to comply with certain product safety certifications. See NEMA Standards publication 250 and IEC publication 60529, as applicable, for explanations of the degrees of protection provided by different types of enclosures. Also, see the appropriate sections in this publication, as well as the Allen–Bradley publication 1770–4.1, (“Industrial Automation Wiring and Grounding Guidelines”), for additional installation requirements pertaining to this equipment.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 20 and 22 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.)

 

I/O Module Groups Each module condenses 2 full module groups (32 outputs) into each I/O chassis slot. For example: Module group 1 = outputs 00 through 17 Module group 2 = outputs 00 through 17 (module group 2 represents the second set of outputs). In Figure 1, terminals 1 through 20 represent module group 1. Terminals 21 through 40 represent module group 2. Terminals 10, 20, 30 and 40 are DC common and terminals 1, 11, 21 and 31 are DC power. Figure 1 Connection Diagram for the 1771OBN DC Output Module

The controller or I/O chassis power supply, connected through the backplane of the I/O chassis, powers the logic circuitry of the output modules. The maximum current drawn from this supply is 330mA. To calculate the requirements for the backplane power supply, add 330mA to the power requirements of all other modules in the I/O chassis. Calculating the requirements will prevent an overload to the chassis backplane and/or backplane power supply.

The 1771–OBN module is a modular component of the 1771 I/O system requiring a properly installed system chassis. Refer to publication 1771–IN075 for detailed information on acceptable chassis, proper installation and grounding requirements. Limi

 

I/O Module Groups Each module condenses 2 full module groups (32 outputs) into each I/O chassis slot. For example: Module group 1 = outputs 00 through 17 Module group 2 = outputs 00 through 17 (module group 2 represents the second set of outputs). Terminals 1 through 20 represent module group 1. Terminals 21 through 40 represent module group 2. Terminals 10, 20, 30 and 40 are DC common and terminals 1, 11, 21 and 31 are DC power. Connection Diagram for the 1771-OBN DC Output Module

The module has 32 status indicators on the module front plate. These represent the control status of the outputs. Each indicator is lit when its corresponding output is energized. An additional indicator is provided to indicate a blown fuse condition 1. Turn off power to the chassis. 2. Remove the module from the I/O chassis. 3. Remove the blown fuse from the fuse holder (accessible through the side cover), and replace with a 4A, 250V normal blow fuse. 4. Reinsert the module into chassis I/O chassis. 5. Turn on power to the chassis

Model recommendation:

A-B I/O module 1771-WN-Z1

A-B I/O module 1771-WG