Notes:
1.
The reader wiring shown is for a standard format Nortech reader (MP1-EM1-0000)
configured for Wiegand format. For other readers, refer to the reader manual.
2.
The power supply to readers at the reader interfaces is fixed at 12v dc. Ensure that this is
appropriate for the reader(s) that you wish to connect to the controller. If the reader requires
a 5v dc supply, connect the +v power lead to the 5v pin on the opposite edge of the PCB.
3.
The maximum distance between 1st and last device = 1,200m.
Use 2 twisted pair screened cable such as Belden 9729. Use 1 twisted pair for D+ and D-
and the other twisted pair for signal ground. Connect the screen to ground at one end only.
Other twisted pair screened cables such as CAT5 may be used as long as all unused pairs
are connected to ground at one end (same as screen).
4.
Where the ACU needs to manage a second door (CRC220 only), wire these terminals to Door 2
using the same method as that shown for Door 1.
Node Selection
DIP Switches 1 to 5 are used to set the node address in binary format:
=Node 0, =Node 1, =Node 2, = Node 3, etc.
5 4 3 2 1
5 4 3 2 1
5 4 3 2 1
5 4 3 2 1
DOC0055 V3.0
