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ii • XR75CX I&O Manual 026-1210 Rev 4

8.3. PRESSURE SWITCH (I2F=PAL) ................................................................................................................................... 13

8.4. D

OOR SWITCH INPUT (I1F OR I2F=DOR) .................................................................................................................... 13

8.5. S

TART DEFROST (I1F OR I2F=DEF)............................................................................................................................ 13

8.6. S

WITCH THE AUXILIARY RELAY (I2F=AUS) ............................................................................................................. 13

8.7. I

NVERSION OF THE KIND OF ACTION: HEATING - COOLING (I2F=HTR) .................................................................... 13

8.8. E

NERGY SAVING (I2F=ES) ......................................................................................................................................... 13

8.9. ON - OFF F

UNCTION (I2F=ONF)................................................................................................................................ 13

8.10. D

IGITAL INPUTS POLARITY....................................................................................................................................... 14

9 RS485 SERIAL LINE (FOR MONITORING SYSTEMS)...................................................................................... 15

10 X-REP OUTPUT (OPTIONAL)............................................................................................................................... 15

11 INSTALLATION AND MOUNTING ..................................................................................................................... 16

12 ELECTRICAL CONNECTIONS............................................................................................................................. 16

12.1. P

ROBE CONNECTION................................................................................................................................................. 16

13 HOW TO USE THE HOT KEY ............................................................................................................................... 17

13.1. H

OW TO PROGRAM A HOT KEY FROM THE DEVICE (UPLOAD) ............................................................................... 17

13.2. H

OW TO PROGRAM THE DEVICE USING A HOT KEY (DOWNLOAD)......................................................................... 17

14 ALARM SIGNALS ................................................................................................................................................... 18

14.1. S

ILENCING BUZZER/ALARM RELAY OUTPUT ........................................................................................................... 18

14.2. A

LARM RECOVERY ................................................................................................................................................... 18

14.3. O

THER MESSAGES .................................................................................................................................................... 18

15 SPECIFICATIONS.................................................................................................................................................... 19

16 CONNECTIONS ........................................................................................................................................................ 21

17 E2 MODBUS NETWORK WIRING ....................................................................................................................... 22

18 ECT MODBUS NETWORKING TO E2S............................................................................................................... 23

18.1. COM P

ORT ASSOCIATIONS - E2 VERSIONS 3.XX AND BELOW ................................................................................ 23

18.2. COM P

ORT ASSOCIATIONS - E2 VERSIONS 4.2 AND ABOVE ................................................................................... 23

18.3. E2 S

ETUP OF DEVICES .............................................................................................................................................. 24

18.3.1. Set Up Network Ports........................................................................................................................................ 24

18.3.2. Add and Connect the Device ............................................................................................................................. 24

18.4. W

IRING TYPES .......................................................................................................................................................... 25

18.5. MODBUS T

ERMINATION BLOCKS ........................................................................................................................... 26

19 DEFAULT SETTING VALUES .............................................................................................................................. 27

APPENDIX A - ALTERNATE MODBUS COM WIRING METHOD FOR E2, XR, XM, AND XEV DEVICES 31