Honeywell 202151TXR User Manual
Confidential |
Copyright © 2012 INNCOM |
e527 Datasheet
Overview
Like the larger e528, the compact, low profile e527 thermostat takes advantage of component end-of-life to redesign hardware and produce a more efficient, lower cost device. With onboard radio and RS485 connection and an added CDS light sensor, the e527 maintains its position as an integral part of the INNCOM Integrated Room Automation System (IRAS) and a property’s Energy Management System (EMS).
Features
In an EMS, the e527 controls room heating and cooling using occupancy data collected
from motion detectors and door switches and can be networked to the property’s Figure 1 E527 central management system. As an IRAS device, the e527 can communicate with
devices within a room and function as a room gateway device towards the mesh network.
•British gang mounting (American gang mounting with optional frame)
•Accurate temperature measurement +/- 1 degree F
•External temperature sensor support
•Motion sensor for occupancy detection
•RF transceiver (onboard 802.15.4, 2.4GHz radio) for wireless guestroom and backhaul network communications
•RS485 for wired backhaul network communications
•Photo sensor for light level detection
Installation Requirements
The e527 must be located on a partitioning interior wall, approximately 5' (1.5 m) above the floor, in a site of average temperature. It is important to ensure that the thermostat is located away from direct sunlight or radiant heat, air discharge grilles, stairwells, outside doors, steam or water pipes, warm air stacks, unheated/uncooled areas, or sources of electrical interference. The unit should not be placed on an outside wall or behind a door.
The e527 is designed to be mounted on a standard British-style single-gang electrical box. For use with an American box, the e527 can be installed in an optional frame by means of two screws. Screws for attaching the optional frame and mounting the e527 are included. The device is shipped with a clear clamshell dust cover.
E 5 2 7 D a t a s h e e t |
P a g e 2 o f 7 |
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Headers
Figure 2 E527 Front/Back and External Headers
H1 |
ICP microprocessor programming |
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H2 |
Humidity sensor |
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H3 |
System interconnect |
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H4 |
PIR sensor |
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H5 |
ES1 |
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H6 |
RS485 network header (see pinout below) |
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H7 |
System 5 header (see pinout below) |
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H8 |
System interconnect |
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H9 |
External temperature control sensor (see pinout below) |
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H6 Pinout |
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Pin |
Function |
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Comment |
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1 |
Common |
GND |
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2 |
12VDC |
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Min |
Nom |
Max |
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10V |
12V |
14V |
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3 |
S5bus |
Communication bus |
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4 |
Dry Input |
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Input |
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5 |
RS485B |
RS485 Twisted Pair |
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6 |
RS485A |
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RS485 Twisted Pair |
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E 5 2 7 D a t a s h e e t |
P a g e 3 o f 7 |
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H7 Pinout
Pin |
Function |
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Comment |
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1 |
Common |
GND |
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2 |
12VDC |
Min |
Nom |
Max |
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10V |
12V |
14V |
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3 |
S5bus |
Communication bus |
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H9 Pinout
Pin |
Function |
Comment |
1 |
Common |
GND |
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2 |
Common |
GND |
3External temp sensor
Motion Detection
The optional motion detector available on the e527 works in conjunction with the electronic door lock to determine room occupancy. If the door lock reports that the door has opened and closed and no motion is detected in the room for a set number of minutes, the e527 engages energy conservation setbacks. When motion is detected, the e527 returns to its occupied state. Also, the e527 reports occupancy changes to the central server.
Figure 3 Motion Sensor Sensitivity
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