Emerson MultiFlex Series User manual

026-1704 Rev 6 06-APR-10
MultiFlex I/O Board
Installation and
Operation Manual

3240 Town Point Drive NW Suite 100
Kennesaw, GA 30144, USA
Phone: [phone]
Fax: [phone]
ALL RIGHTS RESERVED.
The information contained in this manual has been carefully checked and is believed to be accurate. However, Com-
puter Process Controls, Inc. assumes no responsibility for any inaccuracies that may be contained herein. In no event will
Computer Process Controls, Inc. be liable for any direct, indirect, special, incidental, or consequential damages resulting
from any defect or omission in this manual, even if advised of the possibility of such damages. In the interest of continued
product development, Computer Process Controls, Inc. reserves the right to make improvements to this manual, and the
products described herein, at any time without notice or obligation.
READ ALL INSTRUCTIONS CAREFULLY
If the equipment is not used in the manner specified by the manufacturer, the protection provided
by the equipment may be impaired.
SAVE THIS INSTRUCTION MANUAL
This instruction manual contains important operating instructions for the MultiFlex family of I/O
boards, including the MultiFlex 16 input boards, and the MultiFlex 88, 88AO, 168, 168AO, and
168DO combination input/output boards.

Table of Contents • v
Table of Contents
1 OVERVIEW OF THE MULTIFLEX PRODUCT LINE.......................................................................................... 1
1.1. MULTIFLEX 16 INPUT BOARD...................................................................................................................................... 1
1.2. MULTIFLEX COMBINATION INPUT/OUTPUT BOARDS................................................................................................... 2
1.3. OTHER BOARDS IN THE MULTIFLEX FAMILY .............................................................................................................. 3
1.3.1. The MultiFlex RTU ............................................................................................................................................... 3
1.3.2. The MultiFlex RCB ............................................................................................................................................... 3
1.3.3. The MultiFlex CUB-II and CUB-TD .................................................................................................................... 3
1.3.4. The MultiFlex PAK ............................................................................................................................................... 4
2 MOUNTING AND POWERING ................................................................................................................................. 5
2.1. SNAP-TRACK INSTALLATION........................................................................................................................................ 5
2.2. THE PLUG-INOUTPUT BOARD ..................................................................................................................................... 6
2.3. POWERING THE MULTIFLEX......................................................................................................................................... 6
2.3.1. Choosing Transformer Sizes................................................................................................................................. 7
2.3.2. MultiFlex 16 Power Wiring .................................................................................................................................. 7
2.3.3. MultiFlex Combination Input/Output Board Power Wiring................................................................................. 7
2.3.3.1. New-Style MultiFlex Combination I/O Boards (with Isolated Power Supply).................................................................. 8
2.3.3.2. Old-Style MultiFlex Combination I/O Boards (No Isolated Power Supply)...................................................................... 8
2.3.4. Wire Types and Maximum Distances.................................................................................................................... 9
3 THE I/O NETWORK.................................................................................................................................................. 10
3.1. WIRE TYPES ............................................................................................................................................................... 10
3.2. NETWORK CONFIGURATION
(DAISY CHAINS) .................................................................................................................................................................. 10
3.2.1. Maximum # of Boards on a Daisy Chain............................................................................................................ 10
3.3. NETWORK ID NUMBERS............................................................................................................................................. 11
3.3.1. Numbering the MultiFlex 16............................................................................................................................... 11
3.3.2. Numbering for MultiFlex Combination I/O Boards ........................................................................................... 11
3.3.3. Addressing the 168DO........................................................................................................................................ 12
3.4. SETTING THE BAUD RATE .......................................................................................................................................... 12
3.5. SETTING THE TERMINATING RESISTANCE JUMPERS................................................................................................... 12
4 I/O BOARD INPUT AND OUTPUT SETUP............................................................................................................ 14
4.1. THE INPUTS................................................................................................................................................................. 14
4.1.1. Connecting Sensors to Input Boards................................................................................................................... 14
4.1.1.1. Wiring ............................................................................................................................................................................... 14
4.1.1.2. Input Wiring When Replacing 16AI or CIO/8IO Boards With MultiFlex....................................................................... 14
4.1.1.3. Sensor Wiring Types ........................................................................................................................................................ 15
4.1.1.4. Input Type Dip Switches .................................................................................................................................................. 15
4.1.1.5. Pulse Type Inputs.............................................................................................................................................................. 15
4.1.2. Power Connection............................................................................................................................................... 16
4.1.2.1. Current Ratings for On-Board Power Sources ................................................................................................................. 16
4.1.2.2. Powering Sensors Requiring 24VAC Off the Power Transformer................................................................................... 16
4.1.3. Sensor Types for MultiFlex Input Points ............................................................................................................ 16
4.2. THE RELAY OUTPUTS................................................................................................................................................. 16
4.2.1. Output Fail-Safe Dip Switches............................................................................................................................ 16
4.2.2. Relay Output Ratings and Fuse Protection......................................................................................................... 17
4.3. THE ANALOG OUTPUTS.............................................................................................................................................. 17
4.4. THE DIGITAL OUTPUTS .............................................................................................................................................. 18

vi • MultiFlex I/O Board I&O Manual 026-1704 Rev 6 06-APR-10
5 BOARD STATUS LEDS ............................................................................................................................................. 19
5.1. STATUS LED............................................................................................................................................................... 19
5.2. TXAND RXLEDS....................................................................................................................................................... 19
5.3. CODE A AND CODE B LEDS...................................................................................................................................... 19
5.4. RELAY OUTPUT LEDS................................................................................................................................................ 20
6 THE MULTIFLEX HAND-HELD TERMINAL INTERFACE............................................................................. 21
6.1. MULTIFLEX I/O BOARD HAND-HELD TERMINAL SCREENS....................................................................................... 21
6.1.1. Navigation........................................................................................................................................................... 21
6.1.2. Opening Screen................................................................................................................................................... 22
6.1.3. Board Address..................................................................................................................................................... 23
6.1.4. Settings............................................................................................................................................................... 23
6.1.5. Input/Output Select Menu.................................................................................................................................... 23
6.1.6. Input Screens....................................................................................................................................................... 24
6.1.6.1. Input Status/Config Menu................................................................................................................................................. 24
6.1.6.2. Status-Volts....................................................................................................................................................................... 24
6.1.6.3. Status-Eng Units ............................................................................................................................................................... 24
6.1.6.4. Input Config...................................................................................................................................................................... 24
6.1.7. Relay Output Screens.......................................................................................................................................... 25
6.1.8. Analog Output Screens........................................................................................................................................ 26
6.1.8.1. Analog Status/Override..................................................................................................................................................... 26
6.1.9. Analog Fail-Safes................................................................................................................................................ 27
6.1.10. Digital Status (PWM)....................................................................................................................................... 27
6.1.11. Digital Period Status......................................................................................................................................... 27
6.1.12. Config Fail % Screen........................................................................................................................................ 28
7 RELAY OUTPUT TEST MODE................................................................................................................................ 29

MultiFlex 16 Input Board Overview of the MultiFlex Product Line • 1
1 Overview of the Multi-
Flex Product Line
The MultiFlex line of control system boards
provide a wide variety of input, output, and
smart control solutions, all of which are based on
a single universal hardware platform. The board
design uses flash-uploadable firmware and plug-
in expansion boards to configure the base plat-
form board and apply it for use as an input
board, relay output board, analog output board,
or a combination I/O board.
1.1. MultiFlex 16 Input Board
The MultiFlex 16 input board offers sixteen
combination analog/digital input points for use
by CPC Einstein and REFLECS control systems.
The MultiFlex 16 is designed to be 100% com-
patible with the previous generation of CPC
input boards (the 16AI), and may be used in ret-
rofits with no additional hardware or software
setup or upgrades.
Like the 16AI, the MultiFlex 16 communi-
cates with the site controller via an RS485 con-
nection to a REFLECS COM A&D network or
an Einstein I/O network. Dip switches on the
board set the network ID (board number) and
baud rate.
The board also provides both +5VDC and
+12VDC output voltage points for use in power-
ing transducers or other input devices that
require power.
Unlike the 16AI, the MultiFlex 16 has a
hand-held terminal interface, which may be used
by technicians to view the input voltage and
engineering unit values for each input point
without need of a voltmeter or front panel con-
troller display.
Table 1-1 shows the part number of the Mul-
tiFlex 16.
Figure 1-1 - MultiFlex 16 Input Board
1
2
3
4
5
678
LEGEND
General Status LED
Termination Resistance Jumpers (three)
I/O Network Connection Input Connections (16)
Input Dip Switches
1
2
3
4
AC Input Power Connection Address and Baud Rate Dip Switch
5
6
7
8
Hand-Held Terminal Port
I/O Net Tx and Rx LEDS 9
10 Transducer Power Out
9
10
P/N Model Name Description
810-3013 MultiFlex 16 16 analog/digital in-
puts, no outputs
Table 1-1 - MultiFlex 16 and 8 Input Board Models

2 • MultiFlex I/O Board Operator’s Guide 026-1704 Rev 6 06-APR-10
1.2. MultiFlex Combination In-
put/Output Boards
There are several models of the MultiFlex
board that combine the functionalities of input
boards, relay output boards, digital output
boards, and analog output boards. The MultiFlex
combination input/output boards are designed to
be replacements for the 8IO Combination Input/
Output Board, but the MultiFlex board provides
several new hardware options and software fea-
tures.
The MultiFlex combination I/O boards con-
sist of two circuit boards: a bottom layer with up
to 16 combination digital/analog inputs, and a
plug-in top layer which contains a combination
of relay outputs, digital outputs, and analog out-
puts.
All boards feature both +5VDC and
+12VDC output voltage points for use in power-
ing transducers or other input devices that
require power.
On the RS485 Network, the MultiFlex com-
bination input/output boards present themselves
to the Einstein or REFLECS site controller as
16AI Analog Input Boards, 8RO Relay Output
Boards, 8DO Digital Output Boards, and/or
4AO Analog Output Boards, depending on what
type of inputs or outputs are equipped. Dip
switches are used to assign network ID numbers
to each board type.
The MultiFlex combination input/output
boards also support a hand-held terminal inter-
face, which allows technicians to view input val-
ues, check output states, and override output
points with fixed digital or analog values.
Table 1-2 shows the available models of
MultiFlex combination input/output boards.
Figure 1-2 - MultiFlex 16AO Combination Input/Output Board
Figure 1-3 - MultiFlex 1616 Combination Input/Output Board
1
2
3
45
678
LEGEND
General Status LED
Termination Resistance Jumpers (three)
I/O Network Connection
Input Connections (16)
Input Dip Switches (S1 and S2)
1
2
3
4
AC Input Power Connection
5
6
7
8
Hand-Held Terminal Port
I/O Net Tx and Rx LEDs
9
10 Transducer Power Out
9
10
Network Failsafe
Analog Outputs (4)
Form C Relay Outputs (8)
Relay Output Fuses (8)
Output LEDs (OUT1-OUT8)
The 8RO and 4AO Address Dip Switch (S4)
The 16AI address and network baud rate dip
switch (S3)
11
12
13
14
15
16
11
12
13
14
15
16
Relay Output
Indicator Lights (16)
Network
Status LEDs
RS-485
Port
24VAC Power
Connector Relays (16)
Hand-Held
Terminal Jack
Failsafe
Dip Switches (16)
Analog
Outputs (4)
S4 and S3
Network Address
Switches
Input
Connectors (16)
General Status LED
Relays Output
Connectors (16)
P/N Model Name Description
810-3063 MultiFlex 88AO 8 analog/digital in-
puts, 8 relay outputs,
4 analog outputs
810-3064 MultiFlex 88 8 analog/digital in-
puts, 8 relay outputs
810-3065 MultiFlex 168AO 16 analog/digital in-
puts, 8 relay outputs,
4 analog outputs
Table 1-2 - MultiFlex Combination Input/Output Board Models

Other Boards in the MultiFlex Family Overview of the MultiFlex Product Line • 3
1.3. Other Boards in the Multi-
Flex Family
In addition to the I/O boards described
above, the MultiFlex hardware is used as the
base for a number of “smart” boards capable of
controlling refrigeration and HVAC systems or
subsystems independently from a central site
controller. These boards are considered “control-
lers” in their own right, and are therefore cov-
ered in separate manuals. For informational
purposes, these boards are described below.
1.3.1. The MultiFlex RTU
Similar in design to the MultiFlex combina-
tion input/output boards, the MultiFlex RTU
board is designed specifically for operating
package rooftop HVAC units as part of an Ein-
stein BX or REFLECS BCU building control
system. The MultiFlex RTU is designed to be a
replacement for the previous generation ARTC,
and is 100% compatible with all legacy Einstein
BX and BCU systems.
The MultiFlex RTU board has 16 analog
inputs, 8 relay outputs and 4 analog outputs.
Most of these I/O points are reserved for sensors
and input devices required to read environmental
data (such as space and supply air temperature)
and control all output devices that control the
environment (such as heat/cool stages and
dampers). The RTU relay outputs are rated for
line voltage (240VAC).
The RTU board controls the rooftop unit
directly with its built-in heating, cooling, and
humidity control algorithms. It may operate in
stand-alone mode, or it may interface with an
Einstein BX or BCU to control the store envi-
ronment in zones and pass along logging and
alarm information.
The MultiFlex RTU has its own installation
and operation manual, P/N 026-1706.
1.3.2. The MultiFlex RCB
The RCB is an improved version of the Mul-
tiFlex RTU. The RCB has sixteen fully configu-
rable analog and digital input points, whereas the
RTU has only eight inputs, two of which are
configurable. The RCB has four analog outputs
for use in controlling variable speed fans, econo-
mizers or modulating heating and/or cooling-
valves, whereas the RTU has only two analog
outputs for use only with VS fans and economiz-
ers. The RCB also features a more sophisticated-
HHT interface and updated algorithms for
controlling heating, cooling, dehumidification,
and air quality. The MultiFlex RCB has its own
installation and operation manual, P/N 026-
1707.
1.3.3. The MultiFlex CUB-II and CUB-
TD
The MultiFlex Condensing Unit Board
(CUB) is a “smart” input/output board designed
to control single condensing units. The Multi-
Flex CUB-II controls all aspects of a condensing
unit, including compressor control, and con-
810-3066 MultiFlex 168 16 analog/digital in-
puts, 8 relay outputs.
810-3067 MultiFlex 168DO 16 analog/digital in-
puts, 8 relay outputs,
and 4 pulse-width
modulating digital
outputs
810-3073 MultiFlex
1616LAO 16 analog/digital in- puts, 16 low-voltage
(24VAC rated) relay
outputs, and 4 analog
outputs.
810-3077 MultiFlex
1616LDO 16 analog/digital in- puts, 16 low-voltage
(24VAC rated) relay
outputs, and 4 pulse-
width modulating
digital outputs.
810-3072 MultiFlex 1616L 16 analog/digital in-
puts, 16 low-voltage
(24VAC rated) relay
outputs.
Table 1-2 - MultiFlex Combination Input/Output Board Models

4 • MultiFlex I/O Board Operator’s Guide 026-1704 Rev 6 06-APR-10
denser fan control. The MultiFlex CUB-TD is a
scaled-down version of the CUB-II that controls
condenser fans using a temperature differential
strategy.
The MultiFlex CUB uses the same general
hardware configuration as a MultiFlex 168AO.
It is equipped with a processor and extra mem-
ory to allow it to control compressors, condens-
ers, refrigeration, and defrost for a single
condensing unit using on-board I/O and control
algorithms.
The MultiFlex CUB has its own installation
and operation manual, P/N 026-1705.
1.3.4. The MultiFlex PAK
The PAK is a distributed pack (rack) control-
ler that controls compressors and condenser
fans. The PAK can control up to 8 compressor-
groups containing up to 16 compressors. The-
compressor control strategy is either Fixed Steps
with up to 20 fixed combinations of compressor
groups, or an alternate Cyclic strategy that dis-
tributes compressor activations, with setpoint/
deadband using ON and OFF delays.
The PAK can also control up to 4 condenser-
fan groups containing up to 8 total condenser
fans. The PAK condenser control strategy is
sequential TD control with setpoint/deadband
using ON and OFF delays.
The MultiFlex PAK has its own installation
and operation manual, P/N 026-1712.

Snap-Track Installation Mounting and Powering • 5
2 Mounting and Power-
ing
The MultiFlex boards are usually installed
by the refrigeration or building equipment man-
ufacturer. Therefore, the installer need only
make the necessary connections between the
boards and the site controller(s).
In some instances, an installer may be
required to mount an I/O board. There are no
restrictions on the location of these boards; how-
ever, for ease of network configuration, it is rec-
ommended that the boards be located adjacent to
the Einstein. I/O boards may be mounted with-
out an enclosure, but they should be mounted in
a location that is not easily accessible to avoid
tampering or damage.
2.1. Snap-Track Installation
MultiFlex boards not supplied in a custom
panel or other enclosure are supplied with a
snap-track for easy installation. The insulation
sheet and I/O board must be removed from the
track before the track is mounted. The snap-track
is mounted using the 0.1875” mounting slots.
Figure 2-1 shows this installation procedure.
Figure 2-2 provides mounting dimensions
for the MultiFlex board.
Figure 2-1 - MultiFlex Snap-Track Mounting
Figure 2-2 - MultiFlex Board Dimensions

6 • MultiFlex I/O Board Operator’s Guide 026-1704 Rev 6 06-APR-10
2.2. The Plug-In Output Board
All MultiFlex boards except the MultiFlex
16 have output sub-boards that plug in to the top
of the base board. These boards are shipped with
the output board pre-installed on the board using
stand-offs, so no additional hardware setup
should be necessary.
The additional board makes the MultiFlex
combination I/O boards considerably taller than
the MultiFlex 16 and all previous-generation
CPC I/O boards. If you will be mounting these
boards in an enclosure, the board will need at
least 2.5" of clearance between the base board
and the panel door.
2.3. Powering the MultiFlex
All models of MultiFlex require a 24VAC
Class 2 input power source. The MultiFlex 16
requires the power source to be center-tapped.
All other models do not use the center tap.
CPC supplies a wide variety of 24VAC trans-
formers with varying sizes and either with or
without center taps. Table 2-1 shows the trans-
former sizes and whether they are center-tapped
or non-center-tapped.
Figure 2-3 - Exploded View -- MultiFlex Combination I/O Board
Xformer P/N VA Rating Primary Voltage Center Tap?
640-0041 50 VA 110 VAC No
640-0042 50 VA 220 VAC No
640-0056 56 VA Multi-tap (120/208/240 VAC) Yes
640-0050 75 VA 110 VAC No
640-0045 75 VA 220 VAC No
640-0080 80 VA Multi-tap (120/208/240 VAC) Yes
Table 2-1 - Transformers Compatible with MultiFlex Board

Powering the MultiFlex Mounting and Powering • 7
2.3.1. Choosing Transformer Sizes
In most site installations, a single trans-
former will power multiple devices. Choose a
transformer with a VA rating large enough to
power all devices that will be attached to it.
Table 2-2 gives the VA ratings of the MultiFlex
board products. Refer to your site controller’s
manual for VA ratings of the other I/O boards
that may be powered by one of these transform-
ers.
2.3.2. MultiFlex 16 Power Wiring
The MultiFlex 16 requires connection to a
transformer with a center tap such as the 56VA
(640-0056) and 80VA (640-0080) transformers
listed in Table 2-1. The 56VA and 80VA trans-
formers have quick-connects on the primary and
secondary sides for connection to line voltage
and the MultiFlex 16 board. Figure 2-4 shows
how to make those connections. Note the center
tap connection on the secondary side (CT) must
be wired to the 0V terminal on the MultiFlex 16.
2.3.3. MultiFlex Combination Input/
Output Board Power Wiring
The MultiFlex 88, 88AO, 168, 168AO, and
168DO boards do not use a center tap. Instead,
the 0V terminal on the board should be con-
nected to a separate Earth ground.
Important! The rules that must be fol-
lowed when connecting a MultiFlex Combi-
nation I/O board to a transformer are
different depending on whether you have a
"new style" MultiFlex board with an isolated
power supply (all MultiFlex boards shipped
after November 1, 2002) or an "old style"
MultiFlex board (all MultiFlex boards
shipped before November 1, 2002).
A new-style MultiFlex Combination I/O
board has a green power LED located next to the
24VAC connection terminal in the upper right
corner of the circuit board (see Figure 2-5 for
reference).
Unit VA VAC Center
tapped?
MultiFlex 16 624Yes
MultiFlex 88,
88AO, 168,
168AO and
168DO
15 24 NO
Table 2-2 - Device Power Requirements
Figure 2-4 - 640-0056 and 640-0080 Transformer Wiring Figure 2-5 - New-Style vs. Old-Style MultiFlex Board
POWER LED
New Style
MultiFlex Board
(Top Left Corner)
NO POWER LED
Old Style
MultiFlex Board
(Top Left Corner)
24 VAC
24 VAC

8 • MultiFlex I/O Board Operator’s Guide 026-1704 Rev 6 06-APR-10
If there is a power LED next to the connec-
tor, your MultiFlex is a new-style MultiFlex --
refer to Section 2.3.3.1., New-Style MultiFlex
Combination I/O Boards (with Isolated Power
Supply) for power wiring instructions.
If there is no power LED next to the connec-
tor, your MultiFlex is an old-style MultiFlex --
refer to Section 2.3.3.2., Old-Style MultiFlex
Combination I/O Boards (No Isolated Power
Supply) for power wiring instructions.
2.3.3.1. New-Style MultiFlex Combina-
tion I/O Boards (with Isolated
Power Supply)
The new-style MultiFlex board can be con-
nected to any of the center-tapped transformers
mentioned in Table 2-2, provided the 0V termi-
nal of the board is connected to an Earth ground.
A center-tapped transformer may power
both center-tapped and non-center-tapped boards
at the same time, as long as none of the non-
center-tapped MultiFlex boards are old-style
MultiFlex boards. If an old-style MultiFlex
shares the same center-tapped transformer as a
device that uses the center tap, boards on the net-
work will be damaged. Figure 2-6 shows how to
wire a non-center tapped device to a center-
tapped transformer.
In addition, the MultiFlex combination
boards can be powered by one of the 50VA or
75VA non-center-tapped transformers listed in
Table 2-1 on page 6. Figure 2-7 shows how to
wire the transformers to the MultiFlex boards.
You may also tie one side of the secondary
(but not BOTH sides) or the center tap to an
earth ground, provided none of the boards pow-
ered by the same transformer are old-style Mul-
tiFlex boards (see Section 2.3.3.2.).
2.3.3.2. Old-StyleMultiFlexCombination
I/O Boards (No Isolated Power
Supply)
Like the new-style MultiFlex board, the old-
style MultiFlex Combination I/O board can be
connected to any of the center-tapped transform-
ers mentioned in Table 2-2, provided you follow
the following three rules:
Rule 1: Ground the 0V terminal on the old-
style MultiFlex board to an Earth ground.
Do not connect the center tap of the trans-
former to the 0V terminal.
Figure 2-6 - Wiring Non-Center Tapped MultiFlex Boards to
Transformers With a Center Tap
Figure 2-7 - Non-Center-Tapped Transformer Wiring
All wire connections to earth ground should
be less than six (6) inches long and use a wire
gauge of at least 14AWG.

Powering the MultiFlex Mounting and Powering • 9
Rule 2: Do not power an old-style MultiFlex
non-center-tapped board with a transformer
that is also powering a center-tapped device.
This means you cannot connect an old-style
MultiFlex non-center tapped board to a trans-
former that is powering a MultiFlex 16, 16AI,
8RO, 4AO, 8DO, a Gateway board, or any pre-
vious generation CPC board that uses center-
tapped power. Doing so will destroy the Multi-
Flex board.
Rule 3: The secondary of the transformer
must not be grounded on any side.
Verify that neither side of the transformer
secondary is connected to earth ground before
powering the old-style MultiFlex board. A
grounded secondary will damage the MultiFlex
board.
In addition, the old-style MultiFlex combina-
tion boards can be powered by one of the 50VA
or 75VA non-center-tapped transformers listed
in Table 2-1 on page 6. Figure 2-7 shows how to
wire the transformers to the MultiFlex boards.
2.3.4. Wire Types and Maximum Dis-
tances
For powering I/O boards, use only the listed
wire types from Table 2-3. Three-conductor non-
shielded cables are the recommended wire for
connecting between the center tapped trans-
former and the I/O boards. Shielded cable should
not be used for power wiring. The center tap
should be wired with the third conductor to earth
ground at the transformer.
Each MultiFlex board should have its 0V ter-
minal taken to a short, solid earth ground.
The wire length from the transformer and the
number of boards connected to the same wire
determines the type wire gauge used. In most
cases, the distance between the I/O boards and
the transformer that supplies power to them is
not enough to be concerned with. But it is very
important not exceed this maximum wire length
or the boards will malfunction.
Use these formulas to determine if the wire
gauge you are using fits within specification:
Power Wiring Types
14 AWG Belden 9495 or equivalent
18 AWG Belden 9493 or equivalent
Table 2-3 - Power Wiring Types
14 AWG:
Feet = 0.40/(VA/24) x 0.005
18 AWG:
Feet = 0.40/(VA/24) x 0.013
(VA is the total VA rating of the I/O boards)
For example, if you had an 80 VA load:
14 AWG: 24 ft. (rounded down)
18 AWG: 9 ft.
Figure 2-8 - Power Wire Lengths

10 • MultiFlex I/O Board Operator’s Guide 026-1704 Rev 6 06-APR-10
3TheI/ONetwork
All MultiFlex boards and controllers use an
RS485 network connection to communicate with
Einstein and REFLECS site controllers. Techni-
cians who are familiar with CPC’s previous gen-
eration 16AI, 8IO, and ARTC boards will find
the network setup procedure for the MultiFlex
boards to be very much the same.
3.1. Wire Types
CPC specs Belden #8641 shielded twisted
pair cables for use as I/O network wiring (or
Belden #82641 and Belden #88641 for plenum
installations).
If the recommended cable is not available in
your area, be sure the wiring meets or exceeds
the following specs:
3.2. Network Configuration
(Daisy Chains)
The RS485 Input/Output (I/O) network is
wired in a daisy-chain configuration. In a daisy
chain, boards are wired together in series with no
branches or "star configurations," and the net-
work is terminated at either end of the daisy-
chain.
A diagram of this network arrangement is
shown in Figure 3-1.
3.2.1. Maximum # of Boards on a
Daisy Chain
To determine how many MultiFlex control-
lers may be daisy-chained together, look for a
plus sign "+" at the end of the model type on the
board’s plastic insulating cover.
The "+", which appears on all MultiFlex
boards manufactured after May 2004, means the
board is equipped with a low-power network
transmitter. Up to 256 of these boards may be
connected to a single controller. If the board has
no "+" beside the model type, the maximum
number that can be connected to an E2 is 32.
If you have a mixture of plus and non-plus
boards, multiply the number of non-plus boards
by 8, and add that to the number of plus boards.
This will result in the maximum number of
boards you can interconnect.
Shielded? Yes
Conductor Type Twisted Pair
Gauge 18 - 24 AWG
Capacitance between
signal wires 31 pF/ft or less
Capacitance between
signal and shield 59 pF/ft or less
Nominal Impedance 12050
Table 3-1 - RS485 I/O Network Wiring Specifications
Figure 3-1 - I/O Network Configurations
Figure 3-2 - MultiFlex "Plus" Board Indicator
TERMINATION
TERMINATION

Network ID Numbers The I/O Network • 11
3.3. Network ID Numbers
Each device on an RS485 segment has a net-
work dip switch that must be used to assign the
board a unique network ID number.
The network ID number makes a board
unique from other boards on the network of the
same type. This allows the site controller to find
it and communicate with it.
Boards of the same type should be numbered
in sequence, starting with one and continuing
with two, three, and so forth.
3.3.1. Numbering the MultiFlex 16
Both the MultiFlex16 and the previous-gen-
eration 16AI are recognized as “16AIs” by the
site controller, and therefore each one of both
types of boards should have a unique board
number.
The network ID on the MultiFlex 16 is set
using the first five dip switches on dip switch
bank S3. Refer to Figure 3-3 for dip switch set-
ting instructions.
3.3.2. Numbering for MultiFlex
Combination I/O Boards
The "+", which appears on all MultiFlex
boards manufactured after May 2004, means the
board is equipped with a low-power network
transmitter. Up to 256 of these boards may be
connected to a single controller. If the board has
no "+" beside the model type, the maximum
number that can be connected to an E2 is 32.
If you have a mixture of plus and non-plus
boards, multiply the number of non-plus boards
by 8, and add that to the number of plus boards.
This will result in the maximum number of
boards you can interconnect.
Table 3-2 shows all of the combination Mul-
tiFlex I/O boards and the board numbers they
represent.
Because the 1616 family of MultiFlex
boards contains the same amount of relays as
two 8RO boards, these boards must be config-
ured as two 8RO boards with consecutive num-
bers. Selecting an address on the output switch
will number the relay outputs as an 8RO with the
selected address and a second 8RO of the next
consecutive address (for example, setting the
switch to #1 will number the relays as 8RO #1
and #2).
Figure 3-3 - 16 Network ID and Baud Rate Switches
S4 S3 S2 S1
23456781
ON
2345678
1
ON
2345678
1
ON
23456781
ON
16AI: POSITION 1-5 NETWORK ADDRESS (1-16)
POSITION 6-7 BAUD RATE (9600 or 19200)
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2
2
3
3
4
4
5
5
6
6
7
7
8
8
1
1
ON
BOARD 1 BOARD 2 BOARD 3 BOARD 4
BOARD 5 BOARD 6 BOARD 7 BOARD 8
BOARD 9 BOARD 10 BOARD 11 BOARD 12
BOARD 13 BOARD 14 BOARD 15 BOARD 16
ADDRESS
2345678
1
BAUD RATE
2345678123456781
19200 BAUD9600 BAUD
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
23456781
ON
23456781
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
BOARD 17 BOARD 18 BOARD 19 BOARD 20
BOARD 21 BOARD 22 BOARD 23 BOARD 24
BOARD 25 BOARD 26 BOARD 27 BOARD 28
BOARD 29 BOARD 30 BOARD 31
MultiFlexModel
Type 16AI 8RO 4AO 8DO
88 and 168 1 1
88AO and 168AO 1 1 1
168DO 1 1 1
1616L 1 2
1616LAO 1 2 1
1616LDO 1 2 1
Table 3-2 - Model Types and Board Address Requirements

12 • MultiFlex I/O Board Operator’s Guide 026-1704 Rev 6 06-APR-10
Figure 3-4 provides a graphic representation
of input and relay output board numbering for
two MultiFlex 16s, three 8ROs, two MultiFlex
88 boards, and a 1616LAO. Note in this configu-
ration that even though there are only 8 devices,
they behave on the network as if they are 13
devices: 16AIs #1-5, 8RO #1-7, and 4AO #1.
The board numbering dip switches on the
MultiFlex 88, 88AO, 168, and 168AO are S3
and S4, as shown in Figure 3-5. Switches 1-5 on
S3 set the input (16AI) network address.
Switches 1-5 on S4 set the relay output (8RO)
address, and switches 6-8 on S4 set the analog
output (4AO) address.
3.3.3. Addressing the 168DO
Setting up the network ID numbers for the
168DO is the same as setting up a 168AO (see
Section 3.3.2.), except switches 6-8 on switch
bank S4 set the virtual 8DO board address
instead of the 4AO address as shown.
3.4. Setting the Baud Rate
All I/O boards have dip switches that deter-
mine the baud rate at which they communicate.
Currently, the baud rate dip switch in network
components may be set at either 9600 or 19200
baud. Either may be used -- refer to your site
controller’s user manual for the baud rate recom-
mendation (currently 9600 baud for both
REFLECS and Einstein controllers).
On all MultiFlex boards, switches 6 and 7 on
S3 are used to set the baud rate. To communicate
at 9600 baud, set switch #6 UP and #7 DOWN.
For 19200 baud, set switch #6 DOWN and #7
UP. Refer to Figure 3-3 and Figure 3-5 for a
visual look at how the switches must be set.
3.5. Setting the Terminating
Resistance Jumpers
All MultiFlex boards and other RS485
devices have a set of terminating resistance
jumpers (one jumper for each wire lead). These
jumpers are labeled JP2, JP3, and JP4 on the
MultiFlex board.
The purpose of the jumpers is to indicate the
two ends, or termination points, of the segment.
On a daisy chain, one device at the beginning
and one device on the end must be terminated.
On the MultiFlex, this is done by placing all
three termination jumpers in the OUT (toward
the left edge of the board) position. To untermi-
Figure 3-4 - Network Device Numbering (E2 Network Shown)
Figure 3-5 - 168AO Network ID and Baud Rate Switches

Setting the Terminating Resistance Jumpers The I/O Network • 13
nate a MultiFlex, these jumpers must be set to
the IN (toward the center of the board) position.
Figure 3-6 shows the termination jumper set-
tings for all MultiFlex boards.
Figure 3-6 - I/O Network Termination Jumper Settings
S4 S3 S2 S1
2345678
1
ON
2345678
1
ON
2345678
1
ON
2345678
1
ON
TERMINATION JUMPERS
NO TERMINATION - IN (toward center) TERMINATION - OUT (toward left edge)

14 • MultiFlex I/O Board Operator’s Guide 026-1704 Rev 6 06-APR-10
4 I/O Board Input and
Output Setup
4.1. The Inputs
The inputs on a MultiFlex board are compat-
ible with a wide range of analog and digital sen-
sors and transducers. In general, the inputs are
capable of reading analog voltage signals in the
range of 0V to +7VDC and dry-contact (no out-
side voltage) digital sensors and switches.
The specific types of input devices that must
be used with MultiFlex is largely dependent on
the site controller MultiFlex is connected to;
refer to the site controller’s user’s manual for a
full list of compatible sensors and specific sen-
sor wiring instructions.
4.1.1. Connecting Sensors to Input
Boards
Wiring a sensor to the input points on a Mul-
tiFlex board requires three steps:
1. Connect the sensor’s signal wires to the two
terminals of an input point.
2. Set the input type dip switch that corre-
sponds to the point being connected.
3. If necessary, connect the sensor to one of the
5V or 12V power terminals.
4.1.1.1. Wiring
An input point on a MultiFlex board consists
of two terminals, as shown in Figure 4-1. One of
these terminals, labeled “SIG,” reads the signal
from the sensor, while the other, labeled “0v” is
where the sensor’s ground and/or cable shield
wire is connected.
4.1.1.2. Input Wiring When Replacing
16AI or CIO/8IO Boards With
MultiFlex
If the MultiFlex you are installing is replac-
ing an existing 16AI, CIO, or 8IO, you will not
be able to simply unplug the input connectors
from the old board and plug them into the Multi-
Flex. Doing so will cause the inputs to be
reversed and the polarity to be swapped for
points 1 through 8.
You must either re-wire points 1 through 8 to
the proper place on the MultiFlex board, or
obtain Multiflex input adapter cables (P/N 335-
2301), as shown in Figure 4-2. For each 8-ter-
minal connector plugged into points 1-4 and 5-8,
Figure 4-1 - Input Board Points