ABB 1MRK000508-CBr00 Binary Input Module

Configured for digital contact acquisition in ABB Relion 670/650 protection and control IEDs, the ABB 1MRK000508-CBr00 (500BIO01 Binary Input Module) provides 16 binary input channels for external dry contacts, limit switches, auxiliary relay status, and circuit breaker position signals. The module provides galvanic isolation between field inputs and internal bus logic, with hardware and software filtering for contact chatter.

Hardware Specifications

ABB Binary Input Signal Processing

The 500BIO01 input circuitry accepts external binary states from field contacts and transfers the detected status to the protection and control IED logic. The input channels are electrically isolated from the internal bus logic, reducing direct coupling between field wiring and the module electronics.

The module supports two stated auxiliary-voltage variants: RL110 for 110-125 VDC circuits and RL220 for 220-250 VDC circuits. The applicable variant must match the field circuit voltage before installation. Hardware and software filtering are used to suppress contact chatter during state transitions.

Frequently Asked Questions

Q: How many binary signals can the 1MRK000508-CBr00 process?

A: The module provides 16 binary input channels for external contact and status signals.

Q: Does the module provide galvanic isolation?

A: Yes. The supplied data specifies galvanic isolation for individual input channels and between the field inputs and internal bus logic.

Q: What auxiliary voltage variants are specified?

A: Variant RL110 is specified for 110-125 VDC circuits, while Variant RL220 is specified for 220-250 VDC circuits. The installed variant must correspond to the field circuit voltage.

Field Installation Guidelines

Verify the module variant and field circuit voltage before connecting any input wiring. Route binary input conductors separately from high-current power conductors where practical to limit unwanted electrical coupling.

Terminate field wiring according to the applicable Relion IED terminal assignment and installation documentation. Maintain the specified isolation distances and use appropriate protective measures for the connected DC circuits.

For shielded field cables, apply the site grounding scheme specified for the protection and control panel. Do not connect a cable shield at multiple points unless the system grounding design explicitly requires it.

Before energizing the module, verify input polarity, auxiliary voltage, terminal assignments, and continuity of each external contact circuit. Confirm that the binary status reported by the IED corresponds to the actual field contact state.