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Part# 8112

(SeaDAC Lite PLC-8)

USB to 4 Optically Isolated Inputs / 4 Form C Relay Outputs Digital Interface Adapter


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Control and monitor four optically isolated inputs and four Form C (SPDT) relay outputs via any USB connection with the 8112. Inputs can range from 5-30VDC and provide 3500VDC (2500VAC RMS) isolation to ground, while the high-current Form C relays can switch up to 6A loads at 250VAC and up to 5A at 60VDC. The Form C relays can be wired for either normally open or normally closed operation. Each Form C relay has a discrete common and each pair of inputs share a common. Status LEDs display I/O activity and field wiring is simplified via 3.5mm removable terminal blocks.

The SeaMAX software suite supports the SeaDAC Lite family and is designed to work with third party applications via the SeaMAX API. Sealevel's SeaMAX software drivers and utilities make installation and operation easy using Windows and Linux operating systems.

The 8112 integrates Sealevel's SeaLATCH locking USB port, which is fully compatible with standard USB cables. When used with the included USB cable with a SeaLATCH USB type B connector, the metal thumbscrew provides a secure connection to the device and prevents accidental cable disconnection.

SeaDAC Lite modules are housed in a rugged, attractive plastic enclosure ideal for mounting on walls, under counters, or inside panels. The 8112 is USB bus powered, so no external power supply is needed. Standard operating temperature range of SeaDAC modules is 0C to +70C and extended temperature range (-40C to +85C) is optional.
Call for Price No
Brand/Family SeaDAC Lite
Host Interface(s) USB
# of Ports 4/4
Digital I/O Isolated Inputs, Form C Relay Outputs
Number of Inputs/Outputs 4 Inputs, 4 Outputs
USB Specification 1.1 Compliant, 2.0 Compatible
Power Requirement +5V @ 500mA
Input Range 5-30 VDC
Input Isolation 2500VAC RMS, 3500VDC
Input Impedance 6.2K Ohms in series
Output Power DC 240W, AC 1200 VA
Contact Voltage 60VDC max., 250VAC max., (5VDC min.)
Contact Current AC 6A max.
Contact Current DC <30 VDC @ 5A max., >30 VDC @ 700mA max., (100mA min.)
Contact Operate Time 10ms max.
Contact Release Time 5ms max.
Operating Temperature 0 - +70C
Extended Temperature Call for Options
Storage Temperature -50 - +105C
Humidity Range 10 - 90% Relative Humidity, Non-Condensing
Dimensions 4.3" (L) x 3.4" (W) x 1.3" (H)
  • • 4 optically isolated inputs
  • • Optical isolation provides protection against surges and ground loops
  • • 4 SPDT Form C relays
  • • Field wiring is simplified via removable 3.5mm terminal blocks compatible with 16-30 AWG wire
  • • Optional removable spring-clamp terminal blocks available
  • • Status LEDs display I/O activity and USB connection
  • • Sealevel's SeaLATCH locking USB port provides secure connection with SeaLATCH USB cables via metal thumbscrews
  • • Powered by USB connection
  • • Sealevel software supports Windows 7/Vista/XP/2000 operating systems
  • • Housed in rugged, attractive plastic enclosure
  • • Includes 6' USB type A to SeaLATCH USB type B device cable (Item# CA356)

USB Extension Cable
USB Extension Cable


The Digital I/O Handbook
The Digital I/O Handbook


Isolated 7-Port USB Hub
Isolated 7-Port USB Hub


Spring Clamp Terminal Blocks
Spring Clamp Terminal Blocks


SeaLATCH Locking USB Device Cable
SeaLATCH Locking USB Device Cable


The Digital I/O Handbook (*Free)
The Digital I/O Handbook (*Free)


USB Device Cable
USB Device Cable


7-Port USB 2.0 Hub
7-Port USB 2.0 Hub


DIN Rail Mounting Clips
DIN Rail Mounting Clips


Screw Terminal Blocks
Screw Terminal Blocks


Proudly Made in the USA
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