RDR2S-A and I8O4 Hardware Installation Description of Signals
24-10239-596 Rev. D
15
Open Collector Output Points
Description of Signals – The following are open collector outputs:
• Reader 1 Red LED
• Reader 1 Green LED
• Reader 2 Red LED
• Reader 2 Green LED
The allowable voltage range for these signals is 0-24VDC, limited to
50mA.
IMPORTANT: These open collector outputs can be damaged with the use of
alternating current (AC) potentials as low as 1VAC. The LED outputs can only
be connected to direct current (DC) loads up to 24VDC.
Reference – These signals are referenced to logic ground (COM).
Protection – Each signal has a 30V transient voltage suppressor between
it and system ground.
Relay Output Points
Description of Signals – NC, NO, and COM are the three connections to a
single pole, double throw relay.
The following are the relay outputs:
• Reader 1 Strike
• Reader 1 Shunt
• Reader 2 Strike
• Reader 2 Shunt
Reference – The relay is a dry contact relay rated at 1A at 24VDC/VAC,
25VA maximum.
Reader Power
Description of Signals – 250mA at 12VDC is provided for each reader.
Protection – There is a 750mA PTC (Positive Temperature Coefficient)
re-settable fuse.
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