The 16-Channel Relay Module is a full-height 3500 rack module that provides 16 independent relay outputs. Any number of 16-Channel Relay Modules may be installed in any available slots to the right of the Rack Interface Module (RIM), allowing flexible system expansion.

Each relay output can be independently programmed to implement application-specific voting and alarm logic. This makes the module suitable for alarm annunciation, interlocking, and control functions in machinery protection and monitoring systems.

Each relay includes configurable Alarm Drive Logic, which can be programmed using AND / OR logic. Alarm Drive Logic can use inputs such as:

Alert alarms

Danger (Trip) alarms

Not-OK status

Individual PPLs (Point Protection Logic) from any monitor channel

Any combination of monitor channels within the rack

All relay logic is configured using the 3500 Rack Configuration Software, allowing precise adaptation to system requirements.

Note:
Triple Modular Redundant (TMR) applications require the 3500/34 TMR Relay Module.
Refer to Bently Nevada Specification and Ordering Information, part number 141534-01, for details.

Specifications
Power Requirements

Power consumption: 5.8 W typical

Powered from the 3500 system backplane

Status Indicators

OK LED:

Illuminated when the module is operating correctly

TX/RX LED:

Flashes to indicate proper communication between this module and other rack modules

CH ALARM LED:

Illuminated when the corresponding relay channel is in an alarm state

Relay Outputs

Relay type: Single-Pole, Double-Throw (SPDT)

Environmental sealing: Epoxy-sealed relays for improved reliability

Arc suppressor:

250 Vrms, installed as standard

Electrical Ratings

Contact life:

100,000 operations at 5 A

24 VDC or 240 VAC resistive load

Operating Mode

Channels are arranged in four groups of four relays

Each group is switch-selectable for:

Normally De-Energized (NDE), or

Normally Energized (NE) operation

Typical Applications

Alarm annunciation and shutdown signaling

Voting logic and interlock control

Integration with DCS, PLC, and ESD systems

Machinery protection and condition monitoring systems

BENTLY 3500/33(149986-01) 16-Channel Relay Control Module