
HONEYWELL EXCEL 5000 OPEN SYSTEM 
FEATURES 
 Various state-of-the-art communication options: Open 
 Unique features in open L
 Reduced engineering and start-up costs: Huge variety 
 Easy and flexible installation: Screw terminals; mounting 
 Operating options: Integrated operator interface, XI582 
GENERAL 
The Excel 50 controller has built-in communication capability, 
allowing it to be integrated into a Honeywell EXCEL 5000® 
System or into an open L 
with Excel 10 controllers as room/zone controllers or with 3 
party products. It can also serve as a stand-alone controller. 
Typical areas of application include heating systems, district 
heating systems, and air conditioning plants for restaurants, 
shops, offices, and small branch government buildings. 
The Excel 50 supports standard LonMark™ Network Variables according to the LonMark™ Interoperability Guidelines 
V.3.0. It can serve 22 integrated I/Os and supports peer-topeer communication; thus, in the case of larger-scale applications, several different controllers can be linked and 
accessed. The system firmware is stored in Flash EPROM 
located in the application module (a separate module plugged 
into the controller housing.) Flash EPROM allows easy 
upgrading of the operating system via download. 
The Excel 50 is a freely programmable controller engineered 
using Honeywell’s CARE programming tool. For L 
interoperability, a maximum of 46 LonMark™ NVs are 
available. 
ONWORKS® network communicating 
ONWORKS® 
DESCRIPTION 
The Excel 50 controller is available in two housing versions, 
one with and one without a Man-Machine-Interface (MMI.) 
The MMI version allows buswide access to other controllers. 
The XI582 operator interface or the PC-based XL-Online 
rd
operator and service software can be used in conjunction with 
either version. The housing can be mounted inside a cabinet 
on a DIN-rail or in a cabinet front door. 
The Excel 50 has eight analog inputs, four analog outputs, 
four digital inputs (three of which can be used as totalizers,) 
and six digital outputs. The digital outputs allow the direct 
drive of 3-position actuators (up to the max. load.) The controller can be wired either with screw terminal blocks directly 
at the housing.) Pre-wiring is possible in both cases, and a 
controller can be replaced without rewiring. 
The application modules – all with Flash EPROM – are 
available in five bus-wide access versions and one standalone version. They feature a variety of bus interfaces (see 
Table 1.) Large RAMs provide for increased trending 
capability. 
All changeable parts or switches are accessible without 
opening the housing. Communication capabilities and 
memory are easily upgraded by replacing application 
modules. 
Excel 50 
CONTROLLER 
SPECIFICATION DATA 
L
ONWORKS® bus, Meter-bus, or C-bus communication 
Booster® reduces the number of required NVs and thus 
also the number of required controllers; NV bindings can 
be restored after controller reset (and thus need not be 
redone after exchanging controllers); 46 NVs supported for 
L
ONWORKS® integration 
of pre-tested and fully documented applications 
inside cabinet (DIN rail) or in cabinet front door 
Remote Interface, XI882 Remote Touch-Panel Interface, 
and XL-Online PC-based interface 
ONWORKS® networks: NV-
 ® U.S. Registered Trademark 
Copyright © 2015 Honeywell Inc. • All Rights Reserved    EN0B-0088GE51 R0215 

EXCEL 50 CONTROLLER – SPECIFICATION DATA 
SPECIFICATIONS 
Versions 
Housing 
 XL50A-MMI and XL50A-CY (with Man-Machine Interface);  
 XL50A (without MMI.) 
Versions with MMI 
Both the XL50A-MMI and the XL50A-CY feature a keypad 
(with eight function keys and four fast-access keys) and an 
LCD display. 
 The LCD display of the XL50A-MMI has four lines, 16 
characters per line, adjustable contrast, and backlight. 
 The LCD display of the XL50A-CY features 128 X 64 dot 
graphics, adjustable contrast, and backlight. 
Application Modules 
The Excel 50 controller can be upgraded by direct firmware 
download via serial port or C-Bus. Contact your local 
Honeywell affiliate for more information on the available 
firmware and applications. 
Table 1. Module versions 
module  description 
XD50C-F 
XD50C-FC 
XD50C-FL 
XD50C-FCL 
XD50-FCS  Bus-wide access via C-Bus / Meter-Bus; 1 MB 
XD50-FLS  Bus-wide access via LONWORKS® / Meter-Bus; 
Mounting Options 
Front door mounted with sealing ring. 
Cabinet mounted on DIN-rail (rail clips shipped with device.) 
I/O Terminal Connection 
Screw terminal blocks directly attached to housing. 
Power Supply 
Voltage 
24 Vac, ±20 %, 50/60 Hz from external transformer. 
Current 
3 A (2 A if digital output current  1.5 A.) In case of power 
failure, the super gold capacitor saves RAM content and realtime clock for 72 hours (thus, no battery disposal necessary.) 
Power Consumption 
Max. 10 VA without load at digital outputs. 
Stand-alone; 2 MB Flash EPROM; 256 KB RAM; 
European and Chinese language support 
Bus-wide access via C-Bus; 2 MB Flash EPROM; 
256 KB RAM; European and Chinese language 
support 
Bus-wide access via L 
Flash EPROM; 256 KB RAM; European and 
Chinese language support 
Bus-wide access via C-Bus / 
2 MB Flash EPROM; 256 KB RAM; European 
and Chinese language support 
Flash EPROM; 256 KB RAM 
2 MB Flash EPROM; 256 KB RAM 
ONWORKS® Bus; 2 MB 
 LONWORKS® Bus; 
Input/Output Specifications 
type  characteristics 
eight analog 
inputs 
(universal) 
four digital 
inputs 
four analog 
outputs 
(universal) 
six digital 
outputs 
Voltage:  0...10 V (software-controlled switches 
Current:  0...20 mA (via external 499  resistor) 
Resolution: 10-bit 
Sensor: NTC 20k, -58...+302 °F (-50...150 °C) 
Voltage:  max. 24 Vdc ( 2.5 V = logical status of 
Voltage:  0...10 V, max. 11 V, ±1 mA 
Resolution: 8-bit 
Relay:  via MCE3 or MCD3 
Voltage:  24 Vac per triac 
Current:  max. 0.8 A, 2.4 A for all six triacs 
for high impedance) 
0,  5 V = logical status of 1,) 0...0.4 Hz 
(0...15 Hz for three of four inputs when 
used as totalizer, 4 
parameter requirements) 
together 
th
 input only for static 
All inputs and outputs protected against overvoltage up to 
24 Vac and 35 Vdc. Digital outputs protected against short 
circuits via a changeable fuse (built-in fuse, 5 x 20 mm, 4 A 
quick-blow.) 
Bus and Port Connections 
C-Bus Connection 
Optional; located on application module. Up to 76.8 Kbaud, 
switch provided for selectable termination. 
ONWORKS® Bus Connection 
L
Optional; located on application module. 78 Kbaud, FTT-10A 
Free Topology Transceiver, using LonTalk® protocol. 
Controller Serial Port Connection 
9-pin Sub-D connector, RS 232, 9.6 Kbaud for XI582, XLOnline. 
Meter-Bus Connection 
Optional; located on application module. RS232 serial link 
with RJ45 connector (PW3 Meter-Bus adapter also required.) 
I/O Connectors 
I/O Connector A: 26-pin port, digital outputs and power. 
I/O Connector B: 34-pin port, analog and digital inputs, analog 
outputs. 
EN0B-0088GE51 R0215  2 

EXCEL 50 CONTROLLER – SPECIFICATION DATA 
Environmental Ratings 
Operating temperature:  0...50 °C (+32…+122°F) 
Storage temperature:  -20...+70 °C (-4…+158°F) 
Relative humidity:  5...93% non-condensing 
Purpose:  for home (residential, commer-
cial, and light-industrial) environments 
Construction:  for incorporate mounting in 
cabinets 
RFI, EMI  according to CE regulations 
Pollution degree:  Class II 
Action: Type 1 
Software: Class A 
Impulse voltage:  500 V 
Protection Standards 
IP54 (when front-door mounted with MMI in a cabinet 
conforming to IP54 and use of ACC3 mounting clamps and 
sealing ring.) 
IP20 (when wall-mounted: both with and without MMI.) 
UL94-0: Flame-retardant class of housing material. 
Certifications 
 CE  
 UL 916 and cUL  
 Meets FCC Part 15, Subpart J for Class A equipment. 
Application Module 
Firmware 
The firmware is downloadable via the PC-based XL-Online 
operator and service software or C-Bus. 
Housing 
Plug-in plastic module, wired with screws. 
Application Module LEDs and Ports 
LonWorks service button
POWER, GREEN
LonWorks service LED, RED
XD50-FLS
1 2 3
A1
A2
not used
LonWorks BUS
M-BUS TxD, YELLOW
M-BUS RxD, YELLOW
RESERVED
METER BUS
(RJ45 JACK)
LEDs
XD50C-FCL
1 2 3
A1
LonWorks BUS
Fig. 1. Application modules (examples) 
4 5 6
C-
A2
C+
SHIELD
not used
LonWorks service button
POWER, GREEN
LonWorks service LED, RED
C-BUS TxD, YELLOW
C-BUS RxD, YELLOW
RESERVED
C-BUS TERMI-
NATION SWITCH
C-BUS
TOP 
MIDDLE 
BOTTOM
Terminal Blocks 
fuse
(4 A, quick-acting)
block A block B
Fig. 2. Removable screw terminal blocks 
Block A
24 Vac24 Vac
24 Vac24 Vac
5
1
3
7 9 11 13
42
{
DO1 DO2 DO3 DO4 DO5 DO6
15 33
19
LEDs
16 34
{{{{{{{{{{{{{{{
AO1 AI1AO2 AI2AO3 AI3AO4 AI4DI1
1086
{
{
2117
Fig. 3. Terminal assignment of screw terminal blocks 
port for
application
module
port Bport A
hardware
adjustment
reset
for LCD
serial port
12
14
{
{
{
Block B
26 4424 4222 4020 3818 36
28 4630 32 48
DI2 AI6DI3 AI7DI4 AI8
+10 V / 5 mA REF. DI-POWER
{
AGNDGND
37 39234125 43274529 31 4735
AI5
{
 3 EN0B-0088GE51 R0215 

EXCEL 50 CONTROLLER – SPECIFICATION DATA 
Dimensions 
100
198
cut-out: 186
port for
application
module
70
81
106
34 34
72
1 2
cut-out: 138 150
fuse
hardware
reset
port Bport A
adjustment
for LCD
serial port
85 85
97
126
DIN rail clip position
for models without MMI
1
DIN rail clip position 
for models with MMI
2
Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies Sàrl, Rolle, Z.A. La Pièce 16, Switzerland by its Authorized Representative: 
Automation and Control Solutions 
Honeywell GmbH 
Böblinger Strasse 17 
71101 Schönaich, Germany 
Phone +49 (0) 7031 637 01 
Fax  +49 (0) 7031 637 740 
http://ecc.emea.honeywell.com 
EN0B-0088GE51 R0215  Subject to change without notice