LP4502 connections - Synergis™ Cloud Link

Synergis™ Cloud Link Hardware Installation Guide

Applies to
Synergis™ Cloud Link
Last updated
2022-09-15
Content type
Guides > Installation guides
Language
English
Product
Synergis™ Cloud Link
Version
2.0

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.
LP4502 unit with connections
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 and ULC-S319 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 1k ohm pull-down resistor between D0 and GND, see KBA-78953.