A1BD5D-05

The Yokogawa A1BD5D-05 is a DIN-rail-mounted terminal board for digital signals in Yokogawa FIO systems. It provides a 32-channel connection interface for single or dual-redundant digital I/O module configurations. The -05 suffix identifies the basic version without explosion protection.

Technical Specifications

Parameter	Specification
Model	A1BD5D-05
Base Model	A1BD5D
Brand	Yokogawa
Product Type	Terminal Board for Digital Signals
Channel Capacity	32 channels x 1
Module Configuration	Single or dual-redundant
Mounting Type	DIN rail
Terminal Type	Pressure clamp
Connection Adapter	ATD5A
Connection Cable	AKB331

Function and Signal Connections

The A1BD5D-05 provides the field wiring termination interface for digital I/O modules. Its pressure-clamp terminals connect field-side wiring to the applicable FIO module through the specified connection adapter and cable.

The 32-channel arrangement supports digital signal connections in a single or dual-redundant module configuration. The terminal board serves as the wiring interface; it does not replace the digital I/O module responsible for processing input or output signals.

| Weight | Approx. 0.70 kg |
| Insulation Resistance | 10 MOhm or greater at 500 V DC |
| Withstand Voltage | 2.0 kV AC for 1 minute |
| External Supply Voltage | 24 V DC +/-10% |
| READY Contact Rating | 125 V AC or less, 0.3 A or less; 60 V DC or less, 1 A or less |

Compatible Module Connections

Yokogawa specifies different connection arrangements depending on the digital I/O module:

Digital I/O Module	Connection Adapter	Connection Cable
ADV151 / ADV551	ATD5A	AKB331
ADV161 / ADV561	Direct connection	AKB337

For ADV161 and ADV561, two A1BD5D terminal boards and two AKB337 cables are required. This distinction should be checked when preparing replacement parts or planning a dual-redundant configuration.

Ordering Code

The complete ordering number is A1BD5D-05.

Code	Description
A1BD5D	Terminal Board for Digital, 32-channel
-0	Always 0
5	Basic type without explosion protection

The -05 configuration is not the explosion-protected version. Confirm the required protection classification before selecting a replacement.

Frequently Asked Questions

Q: Is the A1BD5D-05 an analog or digital terminal board?

A: It is a digital terminal board. Its 32-channel configuration is specified for digital I/O modules ADV151, ADV551, ADV161 and ADV561.

Q: Can the A1BD5D-05 support dual-redundant configurations?

A: Yes. Yokogawa specifies the A1BD5D for both single and dual-redundant digital I/O configurations. The required board and cable arrangement depends on the connected module.

Q: Is the A1BD5D-05 suitable for explosion-protected installations?

A: No. The suffix 5 identifies the basic version without explosion protection. An appropriate explosion-protected configuration must be selected when required by the installation.

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