RIBMNW24B-BCAI
2.75" Track Mount BACnet® MS/TP Network Relay
Device; One Discrete Output (20 Amp Relay SPDT
+ Override); Two Discrete Inputs (Dry Contact,
Class 2); One Analog Input (T2/T3 Thermistor /
0-5 Vdc / 0-10 Vdc); 24 Vac/dc Power Input;
Optional End of Line Resistor (EOL) Included.
BI 1
BI 2
REF
A(–)
B(+)
}
BI 2 COM
MS/TP
See EOL
^*
resistor jumper.
Type Analog
O O Not dened
O On T2 Thermistor
On O T3 Thermistor
On On Analog In 5V or 10V
Both jumpers installed from factory. Move
one to Thermistor-Input-Select
Thermistor Input, otherwise leave both on for
5V or 10V Analog In. Connect Analog In
between AI and AI common. Connect
Thermistor between AI and Thermistor +5V.
^
Control
ADDRESS
1 2 3 4 5 6 7 8 9 10 11 12
Relay
Baud
Rate
LSB
MS/TP
MSB
BI 1 COM
1
0
RIBTW24B-BCAI
Enclosed BACnet® MS/TP Network Relay Device;
One Discrete Output (20 Amp Relay SPDT
+ Override); Two Discrete Inputs (Dry Contact,
Class 2); One Analog Input (T2/T3 Thermistor /
0-5 Vdc / 0-10 Vdc); 24 Vac/dc Power Input;
Optional End of Line Resistor (EOL) Included.
5 V
10 V
1 2
OPEN
Pink LED=BI 1 Status
for T2 or T3
Pink LED=BI 2 Status
Green LED=Network Status
Red LED=Relay Status
AI Voltage
Select Switch
Analog In
(Close only one)
SW1 Closed
5 V
SW2 Open
SW1 Open
10 V
SW2 Closed
Thermistor T2 or
T3 input, use 5 V
selection
24 Vac/dc
AI COM
Therm. +5V
EOL termination
^*
resistor jumper.
Connect jumper for
terminating resistor.
Common
N/C
AI
Relay
N/O
To select AI for Thermistor
^
Contacts
}
COM
T2 or T3 input, install jumper.
Specications
# Relays & Contact Type:
Expec
ted Relay Life:
Operating Temperature:
Humidity Range:
Operate Time:
Green LED:
Red LED:
Pink LED:
Pink LED:
Dimensions:
One (1) SPDT Continuous Duty Coil
10 million cycles minimum mechanical
-30 to 140° F
5 to 95% (noncondensing)
18mS
Network Communication
Relay Status
BI 1
BI 2
6.25˝ x 2.75˝ x 1.75˝ (RIBMNW24B-BCAI)
4.28˝ x 7.00˝ x 2.00˝
with .75˝ NPT Nipple (RIBTW24B-BCAI)
Track Mount:
Approvals:
Housing Rating:
MT212-6 Mounting Track Provided
UL Listed, UL916, C-UL
UL Listed, NEMA 1, C-UL, CE Approved,
UL Accepted for Use in Plenum,
Also available NEMA 4 / 4X
Relay Override Switch:
Gold Flash:
Network Media:
No
DIP Switch Control
Twisted Pair 22-24AWG, shielded
recommended
Terminations:
Functional Devices product installed at
both ends of the MS/TP network – Use
120 Ω end of line resistors. All other cases
– Follow instructions from the device
installed at the end of the
MS/TP network.
Polarity:
Baud Rate:
Network is polarity sensitive
9600, 19200, 38400, 57600, 76800,
115200 (DIP Switch Selectable)
DIP Switches* Baud Rate
8 9 10
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
9600
19200
38400
57600
76800
115200
DIP Switches* Relay State**
11 12
1 0
X 1
0 0
* 0 = Open ; 1 = Closed
** Device must be powered for override
All other combinations=9600 baud
• Dry contact digital input is a general purpose input that is not tied to the relay internally. Can be used
with any dry contact switching device, such as a current sensor, to feed back to the network.
Contact Ratings:
20 Amp Resistive @ 277 Vac
20 Amp Ballast @ 120/277 Vac (N/O)
10 Amp Ballast @ 120/277 Vac (N/C)
Not rated for Electronic Ballast
10 Amp Tungsten @ 120 Vac (N/O)
1110 VA Pilot Duty @ 277 Vac
770 VA Pilot Duty @ 120 Vac
2 HP @ 277 Vac
1 HP @ 120 Vac
Power Input Ratings:
81 mA @ 24 Vdc
111 mA @ 24 Vac
Auto
Override on
Override o
Network Compatible Relays
Notes:
• MS/TP Address & Baud Rate must be set prior to power
up via DIP switches.
• Device ID will default to 277XXX where XXX is the
MS/TP Address.
Examples:
MS/TP Address - 004
Device ID - 277004
• Device ID can be changed via network command.
Once changed, it will no longer default to 277XXX.
(MS/TP Address & Device ID must be unique.)
• Order NEMA 4 housing by adding “-N4” to end of model
number. (RIBTW24B-BCAI)
• This model utilizes: BO 1 (Relay output), BI 1 (Dry
contact digital input), BI 2 (Dry contact digital input),
AI 1 (Analog input)
• Device Instance changed via Object Identier Property
of Device Object
• Thermistor Type 2 (T2) Precon 10 K @ 77°F (25°C)
PN ST-R24, Model 24, (or equivalent.) Thermistor Type 3
(T3) Precon 10 K @ 77°F (25°C) Model 3, (or equivalent.)
Thermistor not included.
• If date code is prior to 083012, Version 1.03 or earlier:
• For both T2 and T3, MIN_PRES_VAL must be set to
-36 (real value) and MAX_PRES_VAL must be set
to 987 (real value).
• -35 to 100°C range in 1° steps.
• If date code is 083012 or later, Version 1.05:
• For both T2 and T3, MIN_PRES_VAL must be set to
-36 (real value) and MAX_PRES_VAL must be set
to 66.3 (real value) for Celcius. For Fahrenheit,
MIN_PRES_VAL must be set to -32.8 (real value) and
MAX_PRES_VAL must be set to 151.34 (real value).
• -35 to 10°C
10 to 32°C range in 0.1° steps / 50 to 90°F range in 0.18° steps
range in 1° steps / -31 to 50°F range in 1.8° steps
32 to 100°C range in 1° steps / 90 to 212°F range in 1.8° steps
• For all versions, raw analog default settings are 0 and
1023 (real), respectively. Units default to 95 (no units).
• When connecting 24 Vac to both this device and a
half-wave device, damage to device can occur.
Option 1: Use separate transformers for each device.
Option 2: Add diode between devices, see Option 2
note below.^^
• PIC Statement available on website.
http://www.functionaldevices.com/pdf/datasheets/
pics/BACnet-BCAI_PIC_12_18_12.pdf
Or scan QR code with your smart phone.
MS/TP Address - 121
Device ID - 277121
Made in USA
Meets
“Buy American”
of ARRA 2009
24 Vac
RIBMNW24B-BCAI or RIBTW24B-BCAI
24 Vac/dc
Com
IN4004
Half-Wave Device
24 Vac
Com
^^ Option 2:
Add diode on 24 Vac power (Com)
interconnection between devices.
Band on diode faces towards -BCAI.
071717
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