Honeywell SZL-WLA-A

The following Series C I/O items are included in this document.

• Digital Input 24 VDC 

• Digital Input 110 VAC / 125VDC

• Digital Input 220 VAC

• Digital Output (24 VDC bussed) 

• Digital Output Relay

• High Level Analog Input with HART 

• High Level Analog Input without HART

• Analog Output with HART 

• Analog Output without HART

• Low Level Multiplexer – RTD & TC

• Low Level Input – RTD & TC

• Pulse Input

• Universal Input Output

Description:

All Series C components feature an innovative design that supports enhanced heat management. This unique look 

provides a significant reduction in overall size for the equivalent function.

The unique features of Series C I/O include:

• I/O Module and field terminations are combined in the same area. The I/O Module is plugged 

into the IOTA to eliminate the need for a separate chassis to hold the electronics assemblies.

• Two level “detachable” terminals for landing the field wiring in the enclosure, providing easier 

plant installation and maintenance.

• Field power is supplied through the IOTA, with no need for extra power supplies and the 

associated craft wired marshalling.

• Redundancy is available directly on the IOTA without any external cabling or redundancy control 

devices, by simply adding a second IOM to an IOTA.

• The Series C innovative styling is one of its unique features. This styling includes features to 

facilitate the effective use of control hardware in a systems environment. These features include:

• Vertical mounting for more effective wiring since most field wiring applications require entry from the top or bottom of 

the systems cabinet.

• An “information circle” for a quick visual cue to draw the Maintenance Technician’s eye to important status 

information.

• “Tilted” design for effective heat management within the cabinet enclosure. Since Series C allows for a significant 

increase in cabinet density, an effective heat management system is critical for high systems availability.

• Input and output circuits are protected from shorts to alleviate the need for in-line fusing, reducing installation and 

maintenance costs.

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