The AB 1771-ASBK is a PLC 5 Conformally-Coated Universal Remote I/O Adapter Module. The Conformal Coating protects the module against moisture, extreme environments, and harsh conditions. It interfaces with I/O modules in a 1771 I/O chassis with a remote scanner port for a processor over an I/O link. Using it instead of direct wiring reduces startup, installation, and maintenance costs by I/O being closer to actuators and sensors. The 1771-ASBK supports Pass-Through and uses ControlNet, Ethernet, and DH+ networks for communication. It is compatible with 32 I/O-adapter devices via the I/O link and uses 82W or 150W termination.


The 1771-ASBK module has a communication rate of 57.6 Kbps, 115 Kbps, and 230 Kbps and weighs 1.9 lbs. It has a backplane current load of 1A at 5V DC and a maximum power dissipation of 5.2W. It requires a remote I/O adapter port for connection. For installation, it must be mounted in the left-most slot of the 1771 chassis with I/O modules controlled by a PLC 5 processor. For wiring, the 1770-CD Belden 9463 or equivalent cable must be used.


The 1771-ASBK module has Active, Adapter Fault, and I/O Rack fault diagnostic Indicators, two switch assemblies and a field wiring arm. It provides faster data transmission and backplane scanning over a distance of up to 2500 feet at 230.4K Baud. It supports serial communication and reads/writes data in parallel form. The 1771-ASBK supports 4, 8, 12, 16, or 32-slot I/O chassis and ½, 1, and 2-slot I/O addressing. It improves scan time and I/O image space saving by scanning all slots except the last four. It eases troubleshooting with its enhanced diagnostics features.