SARM55W-000 Yokogawa DCS Terminal Board

Relay Output Terminal Board | Yokogawa SARM55W-000 CENTUM VP

Relay Output Terminal Board | Yokogawa SARM55W-000 CENTUM VP

Availability: 10 left in stock

Yokogawa SARM55W-000 Relay Output Terminal Board The Yokogawa SARM55W-000, also cataloged as the ARM55W Relay Output Terminal Board, operates as...

SKU: SARM55W-000

Manufacturer: Yokogawa
Product No.: SARM55W-000
Product Type: Terminal Boards
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 2200g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa SARM55W-000 Relay Output Terminal Board

The Yokogawa SARM55W-000, also cataloged as the ARM55W Relay Output Terminal Board, operates as a dedicated hardware component for switching discrete digital field signals within Yokogawa CENTUM VP DCS platforms.

Suffix Breakdown & Model Matrix

The model and suffix codes define the precise hardware parameters for the SARM55W assembly:

SARM55W: Relay Output Terminal Board (32-channel, 19-inch rack mount)
-0: Basic type with no options
0: Standard hardware revision
0: Always 0

Hardware Specifications

Parameter	Specification
Model	SARM55W-000
Brand	Yokogawa Electric Corporation
Origin	Japan
Weight	2.2 kg
Dimensions	482.6 x 132.5 x 177 mm (19-inch rack mount, 3U height)
Operating Temp	0 deg C to +50 deg C
Power Consumption	24 VDC +/-5%, max 0.65 A (internal circuit)
Output Points	32 isolated dry-contact relay outputs
Contact Rating	250 VAC at 0.6 A, 30 VDC at 0.6 A, 125 VDC at 0.1 A
Minimum Load	5 VDC, 10 mA
Field Connection	M3.5 or M4 screw terminals
Interconnect Cable	AKB331 (32-point) or AKB337 (64-point) system cables
Interoperability	Compatible with ADV551 and ADV561 Digital Output Modules
Insulation Resistance	>= 10 M-ohm at 500 VDC
Withstand Voltage	3 kV AC for 1 minute (field terminals to frame)

Channel-to-Channel Isolation & Galvanic Signal Execution

The SARM55W-000 utilizes 32 electro-mechanical relays to provide galvanic channel-to-channel isolation across discrete output paths. Interfaced to ADV551 or ADV561 output modules via KS-system cables, the terminal board isolates high-voltage field switching transients from backplane processing buses. Individual channel relays prevent ground potential loops, supporting reliable switching execution for remote inductive field loads, visual alarms, and automated valve actuators.

Frequently Asked Questions

Q: Does the SARM55W-000 terminal board require external suppression when switching inductive loads?

A: Yes. While internal relay contact isolation protects control electronics, installing external RC snubber networks for AC circuits or flyback diodes for DC circuits across inductive loads extends contact life and prevents arc erosion.

Q: How is dual-line field power redundancy managed on this board?

A: The terminal board incorporates dual field-side power supply terminals, distributing redundant 24 VDC power lines across two separate 16-channel relay groups to maintain operational continuity if one power rail fails.

Field Installation Guidelines

Mount the SARM55W-000 securely into a standard 19-inch instrument cabinet rack using four M5 retention screws. Route AKB331 or AKB337 system cables through rear cable support brackets and connect them directly to the card interface ports. Terminate field wiring onto the M3.5/M4 terminal screws using insulated ring terminals, torquing screws to 1.2 N m. Ensure cabinet earthing straps establish direct, low-impedance metal-to-metal grounding contact with the unit's chassis to maintain effective noise suppression and safe fault current paths.

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Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

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