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Installation Instructions
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
The 1771-OBN dc output module is a source output and requires a sink
input. A sink input provides a path to ground and a source output provides
a positive voltage path.
Use this module in all 1771 I/O chassis except 1771-A1, -A2 and 1771-A4
chassis. Refer to the table below for processor compatibility.
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.
Related Manuals for Allen-Bradley 1771-OBN
Summary of Contents for Allen-Bradley 1771-OBN
- Page 1 The 1771-OBN dc output module is a source output and requires a sink input. A sink input provides a path to ground and a source output provides a positive voltage path.
- Page 2 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. 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.
- Page 3 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.
- Page 4 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.
- Page 5 ATTENTION: Miswiring or shorting the output terminals will cause permanent damage to this module. ATTENTION: Observe proper polarity with dc power connections. Reverse polarity, or application of ac voltage could damage the module.
- Page 6 The module has 32 status indicators (Figure 2) 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.
- Page 7 To replace a blown fuse, proceed as follows: 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.
- Page 8 PLC is a registered trademark of Allen-Bradley Company, Inc. PLC is a registered trademark of Allen-Bradley Company, Inc. PLC is a registered trademark of Allen-Bradley Company, Inc. PLC is a registered trademark of Allen-Bradley Company, Inc. PLC is a registered trademark of Allen-Bradley Company, Inc.