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Powering
Trusted Identities
2.1 Supplying power to the MR16in
The MR16in accepts 12 to 24V DC for power. Locate power source as close to the unit as possible.
Connect power with minimum of 18 AWG wire.
Observe POLARITY on VIN!
The VOUT terminal on TB11 is the same as VIN.
2.2 Communication wiring
The MR16in communicates with an intelligent controller (EP2500 for example) via a 2-wire RS-485 interface. The
interface allows multi-drop communication on a single bus of up to 4,000 feet (1,200 m). Shielded cable of 24 AWG with
characteristic impedance of 120Ω is specified for the RS-485 interface. See Specifications.
Install RS-485 termination jumper, J3, on the interface boards at each end of the communication line only.
PLT-05250, A.1
2-wire RS-485
(only 2-wire RS-485 is supported)
6
HID® Mercury™ MR16in-S3 Processor
Installation and Specifications
August 2022
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