Section 1 Introduction; Overview; Specifications - Canary MicroMux User Manual

Section 1 - Introduction 3

1.1 Overview

The MicroMux expands the number of instruments that may be read by most all types of 5v/12v
dataloggers to 4 channels by 4 wire, or 8 channels by two wire, depending on the internal switch settings
and the type of sensor being read. In addition the MicroMux provides integral lightning protection by
utilizing plasma surge arrestors on the control lines. The MicroMux is provided in a panel mount
enclosure.
The MicroMux utilizes advanced high-reliability components such as terminal blocks from Phoenix
Contact, Panasonic relays and a flash microcontroller from Microchip Devices to help insure years of
reliable and trouble-free operation in most any environment (components are rated to standard long term
temp range of at least -40° C to +85° C). The use of low contact resistance relays means almost universal
instrument support, a high degree of lightning protection on the control lines, and virtually infinite channel
isolation.
Warranty is applicable for 2 years from date of shipment. Warranty does not cover failure by improper
installation, misuse, or by nature including, but not limited to; flood, lightning (by improper grounding), fire,
or other catastrophe. Should you encounter problems with your MicroMux, see section 3.1 for the
troubleshooting flowchart.
A diagram of the MicroMux terminal connections is shown below.

1.2 Specifications

General
Power requirements: 9-16 VDC (unregulated)
Quiescent current: < 0.1 µA (Mux Not Enabled)
Channel activated current (2-wire): 42mA
Channel activated current (4-wire): 42mA
Standby Current 1.2mA (Mux stepped past maximum channel)
Control line input impedance: <10K
Control line input levels: 5V through 12V (16V Maximum input)
Transient protection: TVS & Spark Gap
Operating temperature: -40 to +85° C (-40 to +185° F)
Relays
Surge withstand between contacts and coil: 2500V
Breakdown voltage between contacts and coil: 1,500V
Initial contact resistance, max (By voltage drop 6V DC 1A): 75m
Nominal switching capacity (resistive load): 2A 30V DC
Max switching current: 2A
8
Expected Mechanical Life (at 180cpm): 10 Cycles