Carrier 30XW150-400 Control Module Communication, Energy Management Module EMM Inputs and Outputs

Table 9 — Energy Management Module (EMM) Inputs and Outputs

INPUT/OUTPUT	DESCRIPTION	I/O TYPE	DISPLAY MODULE POINT NAME	CONNECTION POINT
4-20 mA Demand Limit	4-20 mA Demand Limit	4-20 mA*	Limit 4-20 mA Signal, DMD	EMM-J7B-CH6
4-20 mA Temperature	4-20 mA Temperature Reset/	4-20 mA*	Reset/Setpnt 4-20 mA Signal, RSET	EMM-J7A-CH5
Reset/Cooling Setpoint	Cooling Set point
Demand Limit SW2	Demand Limit Step 2	Switch Input	Switch Limit Setpoint 2, DLS2	EMM-J4-CH9
Ice Done	Ice Done Switch	Switch Input	Ice Done Storage Switch, ICE.D	EMM-J4-CH11A
Occupancy Override	Occupied Schedule Override	Switch Input	Occupied Override Switch, OCCS	EMM-J4-CH8
Remote Lockout Switch	Chiller Lockout	Switch Input	Remote Interlock Switch, RLOC	EMM-J4-CH10
SPT	Space Temperature Thermistor	10k Thermistor	Optional Space Temp, SPT	EMM-J6-CH2
% Total Capacity	Percent Total Capacity Output	0-10 vdc	Chiller Capacity Signal, CATO	EMM-J8-CH7
RUN R	Run Relay	Relay	Running Status, RUN	EMM-J3-CH25
SHD R	Shutdown Relay	Relay	Shutdown Indicator State, SHUT	EMM-J3-CH24
CA_S	Run Status for Circuit A	Relay	Compressor A Run Status, Q_RUN_A	EMM-J2A-CH17
CB_S	Run Status for Circuit B	Relay	Compressor B Run Status, Q_RUN_B	EMM-J2A-CH18

* A field-supplied 1/2 watt 250 ohm resistor is required across terminals TB6-1,2 (CH6) and/or TB6-3, 4 (CH5).

Local Equipment Network — Information is trans- mitted between modules via a 3-wire communication bus or LEN (Local Equipment Network). External connection to the LEN bus is made at TB3.

Board Addresses — All boards (except the Main Base Board and Energy Management Module Board) have 8-position DIP switches.

Touch Pilot™ Display — The Touch Pilot display port connections are shown in Table 10. Wiring is shown in Fig. 13.

Control Module Communication

RED LED — Proper operation of the control boards can be visually checked by looking at the red status LEDs (light- emitting diodes). When operating correctly, the red status LEDs will blink in unison at a rate of once every 2 seconds. If the red LEDs are not blinking in unison, verify that correct power is being supplied to all modules. Be sure that the Main Base Board (MBB) is supplied with the current software. If necessary, reload current software. If the problem still persists, replace the MBB. A red LED that is lit continuously or blink- ing at a rate of once per second or faster indicates that the board should be replaced.

GREEN LED — All boards have a green LEN (SIO) LED which should be blinking whenever power is on. If the LEDs are not blinking as described check LEN connections for

potential communication errors at the board connectors. See input/output Tables 3-10 for LEN connector designations. A 3-wire bus accomplishes communication between modules. These 3 wires run in parallel from module to module. The J9A connector on the MBB provides communication directly to the Navigator™ display module.

YELLOW LED — The MBB has one yellow LED. The Carrier Comfort Network® (CCN) LED will blink during times of network communication.

Table 10 — Touch Pilot™ Display Port

Connections

CONNECTOR		PIN	FUNCTION
		1	24VAC +
J1	(Power)	2	24VAC -
		3	Earth Ground
		1	RS485 Port (D+)
J2	(COM1)	2	RS485 Port (GND)
		3	RS485 Port (D-)
		1	24VAC (+)
		2	RS485 Port (D+)
J3	(RJ11)	3	RS485 Port (GND)
		4	Unused (no connect)
		5	RS485 Port (D-)
		6	24VAC(-)

Fig. 13 — Touch Pilot™ Display Wiring

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