Emerson XM670K - General Description; Ordering Codes; Installation and Mounting

Document Part # 026-4280 Rev 1 Page 2 of 33
©2022 Emerson Digital Cold Chain, Inc. This document may be photocopied for personal use.
Visit our website at www.climate.emerson.com for the latest technical documentation and updates.
3 General Description
The XM670K isa high level microprocessor based controllers for multiplexed cabinets suitable for applications on medium or
low temperature. It can be inserted in a LAN of up to 8 different sections which can operate, depending on the programming, as
stand alone controllers or following the commands coming from the other sections. The XM670K has respectively 4 and 6 relay
outputs to control the solenoid valve, defrost - which can be either electrical or hot gas - the evaporator fans, the lights, an
auxiliary output (XM670K) and an alarm output (XM670K). The XM670K also has four probe inputs, one for temperature
control, one to control the defrost end temperature of the evaporator, the third for the display and the fourth can be used for
application with virtual probe or for inlet/outlet air temperature measurement. Finally, the XM670K is equipped with three
digital inputs (free contact) fully configurable by parameters.
The instruments are equipped with the HOTKEY connector that permits to be programmed in a simple way. Direct serial output
RS485 ModBUS-RTU compatible permits a simple XWEB interfacing. The HOTKEY connector can be used to connect X-REP
display (depending on the model).
3.1. Ordering Codes
4 Installation and Mounting
This device can operate without any user interface, but normal application is with CX660 or CH660 keyboard (both 660 displays
are supported).
Part Number Description
318-6521 XM670K Case Controller Solenoid, 110V, V5.4, NTC CPC, with Connectors
318-6750 Remote Display Keyboard CX660 for XMs
318-6751
Remote Display Keyboard CH660 for XMs
Table 3-1 - Product Ordering Codes
CX660 CH660
Figure 4-1 - CX660 Keyboard Installation and Mounting
The CX660 keyboard should be mounted on a vertical panel,
in a 29 x 71 mm hole, and secured using the special bracket
supplied Figure 4-1
The temperature range allowed for correct operation is 32 to
140°F (0 to 60°C). Avoid places subject to strong vibrations,
corrosive gases, excessive dirt or humidity. The same
recommendations apply to probes. Allow air to circulate
through the cooling holes.