Distech Controls IO-R-16 Wiring Manual page 10

Power from IO-R-34
Power from IO-R-34
If powering one or more IO-R-16 modules from a IO-R-34 module, simply connect the modules as shown in
Power and RS-485 communication connection is provided through the 5-position "Powered RS-485" connector.
Each IO-R-34 can power up to four (4) IO-R-16 modules.
•
Do not apply power (at any location) until all other wiring is completed. See
•
Checkout," page 17.
Figure 5 IO-R-16 modules powered by IO-R-34 connection.
24Vac/24Vdc
EC-BOS-8
In some cases, some number of IO-R-16 modules may be powered this way (from IO-R-34), while others may be
powered locally using a third-party 13.5-15.75 Vdc power supply. This may be advisable when IO modules are
located long distances from the IO-R-34 providing power, to avoid excessive voltage drops due to wiring resistances.
See the following sections:
"Power from third party 13.5-15.75 Vdc power supply,"
•
Power from third party 13.5-15.75 Vdc power supply
IO-R-16 modules can be powered by a third-party, 13.5V–15.75Vdc power supply. A "battery backed" power supply
is recommended. This provides power to the IO module(s) during AC power loss scenarios.
Figure 6 shows wiring for two assemblies of IO-R-16 modules powered by a battery-backed power supply.
For power budgeting purposes, estimate each IO-R-16 module to consume 2W nominal (0.133 A @15V).
Notes •
Typical current will be less— as this estimate factors in all four relays being pulled in.
Be aware of potential voltage drops when connecting via "trunk power" cabling. Voltage drops are more
•
typical when modules are not located near the power supply. See
For other wiring on the 5-position end connector, see
•
Do not apply power (energize the power supply) until all other wiring is completed. See
•
Initial Checkout,"
10
IO-R-16
page 17.
D5 5C6 D6 D7 7C8 D8 D9
IO-R-16 IO-R-34
U1 0V U2 0V U4 U5 0V U6 U7 0V U8
U3
page 10
"Voltage drop considerations,"
"RS-485 Communications,"
Remote IO-R-16 Module Mounting and Wiring Guide
August 2, 2017
Wiring Details
"Power up and Initial
9C10 D10 AO1 0V AO2 AO3 0V AO4 AO5 0V AO6 AO7 0V AO8
U9 0V U10 U11 0V U12 U13 0V U14 U15 0V U16 AC AC
24Vac/24Vdc
page 11.
"Power up and
Figure 5.
page 3.