SARM55W Yokogawa CENTUM VP Datasheet & Technical Manual

SARM55W Yokogawa CENTUM VP Mechanical Relay Board

SARM55W Yokogawa CENTUM VP Mechanical Relay Board

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YOKOGAWA SARM55W CENTUM VP Relay Board The YOKOGAWA SARM55W, also cataloged as the SARM55W Mechanical Relay Interface Terminal Board, operates...

رمز المنتج: SARM55W

Manufacturer: Yokogawa
Product No.: SARM55W
Product Type: Relay Output Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 2200g
Shipping port: Xiamen
Warranty: 12 months

وصف التقييمات

YOKOGAWA SARM55W CENTUM VP Relay Board

The YOKOGAWA SARM55W, also cataloged as the SARM55W Mechanical Relay Interface Terminal Board, operates as a dedicated hardware component for high-capacity contact output execution within CENTUM VP distributed control networks. The board converts low-level discrete logic command signals from primary digital output cards into high-voltage mechanical wet contact actions. This hardware arrangement provides the physical switching logic needed to drive field actuators, interlock solenoids, and motor starters without direct loading of the internal bus electronics.

Hardware Specifications

Parameter	Specification
Model	SARM55W
Brand	Yokogawa
Origin	Japan
Weight	2.2 kg
Dimensions	482.6 mm x 132.5 mm
Operating Temp	0 to 50 deg C
Power Consumption	24 VDC internal circuit feed, Maximum 0.65 A current draw
Channel Density	32-point mechanical wet contact outputs
Redundancy Support	Configurable single or dual-redundant deployment matrices
Field Device Interface	M4 screw terminal blocks
Compatible Modules	ADV551 (32-point DO module) + ATD5A / ADV561 (64-point DO module)
System Signal Cables	AKB331 (32-point standard link) / AKB337 (64-point high-density link)
Maximum Switching Load	0.6 A per point @ 250 VAC / 0.6 A @ 30 VDC / 0.1 A @ 125 VDC
Minimum Contact Load	5 VDC, 10 mA operational baseline
Field Supply Limits	Dual-line input (16 points per group): 250 VAC Max 9.6 A / 30 VDC Max 9.6 A

DCS Process Control & Contact Channel Isolation

The hardware architecture leverages complete electrical channel-to-channel isolation between the internal 24 VDC execution circuits and the high-voltage wet contact field terminations. This structure isolates the control processing cards from inductive back-EMF spikes generated by field-side solenoid or motor coils. The mechanical relay array integrates directly with the system logic paths, implementing discrete operations while suppressing electromagnetic field noise that could corrupt adjacent 4-20 mA HART loop protocol pathways or analog instrumentation buses running within the same enclosure cabinet.

Frequently Asked Questions

Q: How does the dual-line field power distribution matrix operate when deploying the module in redundant configurations?

A: The board divides the 32 discrete output points into two distinct 16-channel execution blocks. Each block accepts independent external power feeds, allowing technicians to run separate field supply loops. If one external circuit protection breaker trips, the remaining 16 channels continue switching under their own independent field power rail.

Q: What are the consequences of driving switching loads below the 5 V, 10 mA minimum contact load threshold?

A: Operating under the 10 mA baseline prevents the mechanical contacts from performing self-cleaning electrical arcing. Over time, surface oxidation builds up on the contact faces, increasing contact resistance and leading to sporadic open-circuit conditions or missing discrete transitions.

Q: Can the SARM55W board interface directly with 64-point digital output modules?

A: Yes. The board interfaces with the 64-point ADV561 digital output card by utilizing the specialized high-density AKB337 signal cable. This matching pair splits and routes the control channels across the high-capacity M4 terminal screws.

Field Installation Guidelines

Cabinet Frame Seating: Align the chassis wings with the 19-inch enclosure rails. Fasten the unit securely using standard rack screws, verifying that the assembly establishes full structural contact with the panel framework.
M4 Terminal Torque Settings: Secure all field device wiring to the M4 screw terminals using the torque values specified in the facility installation code manual. Loose terminal contacts create resistive heating points and erratic discrete operations.
Low-Voltage Path Routing: Route the AKB331 or AKB337 system cables away from raw high-voltage AC cables. Maintain a minimal physical path clearance of 300 mm inside the cable trays to prevent induction noise from generating false output actions.
Thermal Circulation Control: Check that vertical air passages inside the cabinet housing are entirely free of obstructions. Ensure that active heat dissipation from the 32 mechanical relays does not push the local ambient air past the 50 deg C operational limit.

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