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Chapter 4
Specifications
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Output specifications
Table 4-1. Output specifications
Number of relays 24
Relay configuration 2 banks of 8 and 2 banks of 4
Contact configuration
24 Form C (SPDT) Normally Open, Normally Closed and Common available at screw
terminals
Contact rating 6 A @ 240 VAC or 28 VDC resistive
Contact resistance 100 milliohms max (initial value)
Operate time 10 milliseconds max
Release time 5 milliseconds max
Vibration 10 to 55 Hz (amplitude 1.5 mm)
Shock 10 G (11 milliseconds)
Dielectric isolation
(between relay open
contact)
300 VAC, 50/60 Hz (1 minute)
Dielectric isolation
(between PCB output
lines)
500VAC, 50/60 Hz (1 minute)
Life expectancy 10 million mechanical operations, min
S2 =
pull-up
Energized. NO in contact with Common
Power on
state
S2 =
pull-
down
Not energized. NC in contact to Common
Relay control logic
polarity
User-configurable per bank via switch S1 for invert or non-invert (default). Switch settings
for polarity can be read back via software through the USB bus. Switch settings do not
affect the power on condition. Non-invert mode, when "0" is written or read back via the
USB bus, relays are not energized. Invert mode, when "0" is written or read back via the
USB bus, relays are energized.
Pull-up / pull-down
User-configurable per bank via switch S2 for pull-down (default) or pull-up. Switch
Settings can be read back via software. Pull-down will put the relays in non-energized
mode on power up. Pull-up will put the relays in energized mode on power up.
CyberResearch
®
Digital I/O UCERB 24
CyberResearch, Inc. 19
25 Business Park Drive P: (203) 483-8815; F: (203) 483-9024
Branford, CT USA www.cyberresearch.com