As part of your installation, you might need to include a Mercury LP4502 intelligent controller.
IMPORTANT: LP controllers include a Micro USB port. This connection is not
to be used if UL/ULC listed access control system compliance is required and is to
be maintained.
The following diagram demonstrates how to connect the controller.
| A | Reader connections | TB8: Door 1 Reader NOTE: The wire colors in the illustration refer
to "pigtail" HID readers; the information in parentheses refers
to "terminal block" HID readers.
|
| B | Reader connections | TB9: Door 2 Reader NOTE: The wire colors in the illustration refer
to "pigtail" HID readers; the information in parentheses refers
to "terminal block" HID readers.
|
| C | Power In | Connect + to VIN (observe polarity). Connect - to GND. Use 20 AWG wires minimum. |
| D | Ethernet cable | Connect to the Synergis™ Cloud Link directly or through the network infrastructure. |
| E | RS-485 bus | RS-485 bus connection to other Mercury modules. |
| F | Reader power | 12V = 12 V dc at readers, PASS = voltage “passed through” to
readers. IMPORTANT: For UL294
compliant Synergis™
installations, always install the jumper in the PT
position.
|
| G | 4 x Form-C LP4502: NO: 5A, NC: 3A, inductive @30 V dc, 0.6 PF |
|
| H | Resistors | For OSDP integrations, prevent readers from misinterpreting noise
on a non-driven RS-485 line as data by installing a 1k ohm pull-down
resistor from D0 to GND on both TB8 and TB9. For wiring distances over 10 meters, install a 120 ohm termination resistor between D0 and D1, as well as between A (-) and B (+) on the RS-485 bus of the last connected reader. To find out whether you need to add a 1k ohm pull-down resistor between D0 and GND, see [KBA-78953] Communication issues between OSDP readers and some Mercury hardware. |