INNCOM’s e4 Smart Digital Thermostat is a powerful, multi-purpose Direct Digital Control (DDC) device that can control virtually any HVAC system found in hotel guestrooms. The three e4 models meet different application requirements. The e528 and e527 are wired and are typically used for new installation. The e529 is batterypowered and is designed to meet the needs of existing properties where rewiring is not practicable. This document describes Model e528; information on the e529 and e527 can be found in their respective product guides
In its most basic form, the e528 functions as a programmable DDC thermostat, automatically adjusting fan speeds and valves to achieve set temperature (Note: Guests can manually select heat or cool by pressing the OFF/AUTO button and cycling through OFF, AUTO, HEAT and COOL). The e528 is also an “intelligent” device capable of linking ancillary sensors and serving as an information gateway. For example, coupled with a magnetic door switch (wired or wireless), motion detectors, and other devices, the e528 becomes the brain of a highly effective Energy Management System (EMS) application, communicating EMS information requirements to central servers. It comes standard with five relays and can be equipped with an on-board Infrared (IR) or radio frequency (RF) transceiver and Passive Infrared (PIR) motion detector. The e528 interfaces with all common HVAC unit voltage configurations (24 volt to 277 volt). The e528 can be installed in a wired or wireless INNCOM guestroom control system, which makes installation feasible and affordable in either new construction or retrofit installations. Through interfaces with other devices and sensors, the e528 supports the following functions:
A centrally controlled EMS package is created when the e528 is connected to the property’s Central Interface Network (CINET) with a pair of low voltage wires or by the property’s high-speed TCP/IP network with the addition of a TCT (an Ethernet gateway device). RF networking is possible with radio equipped models. The e528 features a guest-friendly graphic interface with intuitive controls (Figure 2). A user guide for the e528, written primarily for installers and facility management personnel, is available (see References below).
2.4HHz Wireless RF
Performance | 0dB | 20dB |
RF Data Rate | 250kbps | 250kbps |
Antenna Type | SMT | SMT |
Indoor Range | 70ft | 100ft+ |
Outdoor/RF line-of-site range | 540ft | 1000ft+ |
Transmit Power | 1mW | 10mW |
Receive Sensitivity | -94.6dBm | -94.6dBm |
Frequency Band | 2.4GHz | 2.4GHz |
Encryption | AES-128 | AES-128 |
Protocol | 802.15.4 | 802.15.4 |
Frequency Channels | 11-26 | 11-26 |
Location: The e528 must be located on a partitioning interior wall, approximately 1.5 m (5 ft) 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 grills, stairwells, outside doors, steam or water pipes, warm air stacks, unheated/uncooled areas, or sources of electrical or radio interference. The unit should not be placed on an outside wall or behind a door. It is essential that the e4 is mounted flush to the wall and mounted level in both the horizontal and vertical planes; incorrect mounting can degrade IR, PIR, and temperature measurement performance
Installation Requirements for e4 equipped with PIR Motion Detection The e4 thermostat can be equipped with a PIR detector to augment the energy management scheme by detecting motion in the guestroom. Consider the PIR’s view angle, range characteristics, and mounting position to ensure proper coverage. Figure 3 below shows the ranges of the flat and standard PIRs
The e528 is usually mounted on a standard double-gang (4 x 4) junction box. If mounted on a single-gang box, the left side (display side) of the e528 overlaps the wall area to the left of the junction box. A low-voltage mounting plate, mud ring, or low-voltage caddy may be used for mounting 24 volt applications.
To mount the e528:
To simplify installing and removing the e528, the headers and sockets described below and shown in Figure 5 are located on the back of the e528. These accept pre-made wiring harnesses provided by INNCOM. (Note: Take care to note which e528 model is being used. Each model has slightly changed headers and connectors as identified in the drawings on the next page
E528 3G headers
E528 4G headers
Wire Color | Female Connector | Male Connector | Function | Comment |
Brown | 1 | 1 | Common | GND |
Red | 2 | 2 | 12VDC Out/In | 12VDC Supply |
Orange | 3 | 3 | S5Bus Data Tx/RX or IN 2 | Communication Bus |
Yellow | 4 | 4 | IN 1 | Door, Window, PIR, Other |
Green | 5 | 5 | CNET B | RS485 Twisted Pair |
Blue | 6 | 6 | CNET A | RS485 Twisted Pair |
The I/O headers for the e528.3G* and 4G* thermostats are substantially different (see Figure 5 above). The statements and table below detail only the headers that differ in function.
Low Voltage comm / device connector: This header accepts the provided 6- pin harness used to connect low voltage communication, door/window position switch, and other room devices to the e528. Table 3 shows pinout and function for the 3G and 4G. For specifics, refer to the as-built wiring diagrams. “3G,” and “4G” are internal INNCOM product designations used for convenience to differentiate individual hardware configurations. No difference in device capability or effectiveness is implied. Due to end-of-life for certain 3G components, the e528.4G is now the standard INNCOM install, but 3G installations are still supported.
E528 3G/4G Low Voltage Harness (P/N 62-1467) Pinout
External temperature control sensor: This header accepts the wiring harness from an external temperature probe that can be used to supply the e528 with remote temperature measurements. The e528 uses a 10K 1% thermistor for external temperature measurement. This external temperature sensor can be used to monitor room temperature at a different location from where the e528 is mounted or to monitor pipe water temperature. RS485 Networks: (refer to Figure 5) E528.3G cannot act as the media gateway for in-room traffic towards the RS485 network. The most common way to connect the e528.3G is to connect a PC-485.S5 (P/N: 01-9905) on the S5bus.
E528.4G to 2G RS485 Networked Application: with or without door switch input
E528.4G New Installation
RS485 Networked Application with/without door switch input (See Figure 7)
The e528.4G can be used to retrofit an application where a legacy e528 was used. Follow the procedure below:
4G to 2G Standalone application: with/without door switch input (no backhaul network)
Molex 10-position female socket: This female socket accepts the provided 10-pin Molex connector pre-wired with 8- inch, color-coded wiring leads. These leads should be connected to the 24VAC or 100–277VAC power, valve/fan control wiring from the FCU, or other HVAC device with wire nuts inside in the wall junction box in accordance with the wiring diagram provided by INNCOM. Note: For installations in which all leads are not required, the extraneous leads should be cut off at the Molex connector. Figure 8 shows the pinout for the 10-position Molex male connector supplied with all relay output models of the thermostat. The end view of the male connector from the wire insertion side with the pin numbers is indicated. This is the same as looking at the female connector point on the back of the e528. Typical functions for each wire are listed in Tables 4 and 5. For specifics, refer to the as-built wiring diagrams.
24VAC Harness Color Code, Pinout, and Typical Functions 24VAC Harness
Pin | Color | Typical Function |
1 | Green | Ground |
2 | Red | 24VAC |
3 | Black | Common |
4 | Blue | High Fan |
5 | Brown | Medium Fan or Second Stage Heat |
6 | Yellow | Cold Water Valve (FCU) or Compressor Signal (Heat Pump) |
7 | White | Hot Water Valve (FCU) or Reversing Valve (Heat Pump) |
8 | Grey | Valve Power |
9 | Violet | Fan Power |
10 | Orange | Low Fan |
100-277VAC Harness Color Code, Pinout, and Typical Functions
Pin | Color | Typical Function |
1 | Green | Ground |
2 | Black | Line |
3 | White | Neutral |
4 | Yellow | High Fan |
5 | Orange | Medium Fan or Second Stage Heat |
6 | Red | Cold Water Valve (FCU) or Compressor Signal (Heat Pump) |
7 | Brown | Hot Water Valve (FCU) or Reversing Valve (Heat Pump) |
8 | Grey | Valve Power |
9 | Violet | Fan Power |
10 | Blue | Low Fan |
NOTE: If installing 01-9560 64K memory e528 Digital Thermostats, be aware that these devices support the INNCOM ES-1 Flash Memory Module. The ES- 1 provides the ability to copy HVAC related parameter settings from a “golden” e528 that has previously been installed in a room and had its HVAC related parameters set correctly and verified operationally with the HVAC equipment. Once these settings are copied to the ES-1 module, plugging the ES-1 into a new thermostat automatically uploads the settings.
Load Specifications
The following load specification table (Table 6) describes the submitted load Ncharacteristics for testing and UL certification of UL 873. The device complies with the requirements of CAN/CSA C22.2 No. 24-93.
Model | e528-A2L2- I0P0-00WH | e528-A3L2- I0P0-00WH | e528-A1L2- I0P0-00WH | e528-B0L2- I0P0-00WH | e528-C0L2- I0P0-00WH | e528-B1L2-I0P0- 00WH |
Voltage | 24VAC | 24VAC | 24VAC | 100-240VAC | 220-277VAC | 100-277VAC |
Heat Relay K4-5 | 3 amps 125-277VAC General purpose | 3 amps 125-277VAC General purpose | 24 VA PD | 24 VA PD | 24 VA PD | 3 amps 125-277VAC General purpose |
Cool Relay K4-5 | 3 amps 125-277VAC General purpose | 3 amps 125-277VAC General purpose | 24 VA PD | 24 VA PD | 24 VA PD | 3 amps 125-277VAC General purpose |
High Fan Relay K1 | 3 amps 125-277VAC General purpose | 3 amps 125-277VAC General purpose | 2.2 LLA 13.2 LRA | 2.2 LLA 13.2 LRA | 2.2 LLA 13.2 LRA | 2.2 LLA 13.2 LRA |
Medium Fan Relay K2-3 | 3 amps 125-277VAC General purpose | 3 amps 125-277VAC General purpose | 2.2 LLA 13.2 LRA | 2.2 LLA 13.2 LRA | 2.2 LLA 13.2 LRA | 2.2 LLA 13.2 LRA |
Low Fan Relay K2-3 | 3 amps 125-277VAC General purpose | 3 amps 125-277VAC General purpose | 2.2 LLA 13.2 LRA | 2.2 LLA 13.2 LRA | 2.2 LLA 13.2 LRA | 2.2 LLA 13.2 LRA |
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:
Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment.
IC ID: 1609A-202150TXR, or 1609A-202152TXR
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions:
Power Requirements | 24 VAC at 50/60 Hz, 24 VDC nominal, 2.4 VA (e528-3xx/7xx and e528-4xx) 100 to 277 VAC at 50/60 Hz, 2.4 VA (e528-8xx) |
Relay Contact Rating | See Table 4. |
Triac Relay Contact Rating | 50 m at minimum, 250 m at maximum (e528-4xx) |
Recommended Wire Size | 18 gauge |
Thermostat Measurement Range | 33 to 99 degrees F (1 to 37 degrees C) |
Outdoor Air Temperature | 0 to 99 degrees F (-18 to 37 degrees C) |
Display Resolution | Whole degree F, 0.5 degree C (0.1 degree F in test mode) |
Degrees C/Degrees F Display | Toggle Button located on front display |
Standard Deadband | 2 degrees F (1 degree C) between heating and cooling |
Ambient Operating | 41 to 149 degrees F (5 to 65 degrees C), 0-95% RH noncondensing |
Ambient Storage | 33 to 149 degrees F (1 to 65 degrees C) |
Dimensions | (H x W x D) 4.7 x 4.7 x 1.2 in. (120 x 120 x 30 mm) |
Shipping Weight | 0.6 lb (0.27 kg) |
Approvals | L listed #873, CAN/CSA C22.2 No. 24-93 File #E202540/Part 15 of the FCC Rules |
RF Specifications | See TXT RF Product Guide |
Document Revision History
REVISION | DATE ISSUED | REASON FOR CHANGE | |
First issue | 26-Apr-2006 | ||
v1 | 30-Jul-2007 | Reformatted for consistency with other product guides. Information about the other e4 models added to the Overview section. Information on all ordering options and new features added to the Ordering section. | |
v2 | Not issued | Product photos updated. Part number corrected. Figure 3 redrawn. | |
v3 | 27-Jun-2008 | New Figure 2 added (PIR range figures) and figure numbers changed to accommodate the added figure. | |
v4 | 30-Jun-2008 | Switched to new document format. | |
v5 | 30-Jun-2008 | Error in Figure 4 corrected; font discrepancies corrected. | |
v6 | 18-Feb-2010 | Reformatted to new template, RF data updated | |
v6.1 | 22-Apr-2010 | OP/N rewritten to include old scheme; photos updated. | |
v6.2 | 28-Oct-2010 | Added 3G pinout note | |
v7.0 | 05-Apr-2012 | Added 4G information | |
v7.1 | 18-Dec-2012 | Revised FCC/IC statements | |
v7.2 | 12-Feb-2013 | Removed ordering information | |
V7.3 | 10-Feb-2014 | Updated connector photos | |
V8 | 15-Dec-2016 | Reformat to HON branding. Remove G2 Legacy info |
Honeywell
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