ClimateMaster MPC User Manual

THE SMART SOLUTION FOR ENERGY EFFICIENCY
MPC MultiProtoCol DDC Controls
November 19, 2018
8
Figure 6: Communications Selections
Communications Selection
When the Communications Selection jumper is in the
“BACnet over ARC156” position, DIP switch selectors
SW1, SW2, SW3, and SW4 are all disabled. When the
communications selection jumper is in the “BACnet over
ARC156” position, BACnet protocol is selected and the
baud rate is also selected to be 156 kbps.
When the communications port is congured for RS-
485 communications, use standard dedicated 22AWG-
18AWG twisted pair wire.
When the communications port is congured for the
ARC156, use a ARC156 cable available from
Automated Logic.
For complete details on wiring, termination, for BACnet
MS/TP, refer to ANSI/ASHRAE 135-1995, clause 9.2.2.
Refer to the Application Note for the BACnet devices
that you will be interfacing with for specic wiring.
Communications Wiring Instructions
1. Be sure the module’s power is off before
wiring it to the ARC156 or RS-485
communications bus.
2. Check the network communication wiring
for shorts and grounds.
3. Connect the ARC156 or RS-485 wires and
shield to the module’s screw terminals as
shown in Figure 9. Be sure to follow the
same polarity as the rest of the ARC156 or
RS-485 communications network.
4. Power up the module.
5. Proper communications for all protocols
and baud rates can be veried by making
sure the transmit (Tx) and receive (Rx) LEDs
are active.
Protocol Congure
The communications port on the MPC has MultiProtoCol
capability which means the MPC can be congured
to communicate via BACnet, Johnson Controls N2, or
ModBus communication protocols. This conguration is
done via the “Communications Selection” jumper and
the 4-position DIP switch package (SW1, SW2, SW3,
SW4) located on the MPC. The communications port’s
baud rate is also set with this same 4-position DIP switch
package. See Figure 5 below.
Note: If using ARC156 wiring, then only BACnet
protocol can be used. When using RS-485 wiring, any
of the 3 protocols (BACnet, N2, ModBus) can be used.
Figure 5: Wiring the ARC156
MPC Controller Overview

ClimateMaster MPC Specifications

General

Brand	ClimateMaster
Model	MPC
Category	Controller
Language	English