Specifications

Figure 1.0-2 Model 518 Side Interface Panel

1.1.2.1 AC Power Cord Input (Mains)

Labeled POWER, this Universal IEC power connector is located on the

bottom, center of the panel. The Voltage supplied (Mains) must match

the Chamber voltage. All Chambers are 115 VAC / 60 Hz, unless

otherwise specified.

1.1.2.2 COMM PORT (RS 485 & Analog Voltage Outputs)

The Comm Port is the 9-pin subminiature-D jack (sub-D) located to the left

of the AC Power Input. This connector is used for both the analog sensor

output signals and the RS485 communications output (optional) from the

microprocessor controllers. The Comm Port is common to both the

Temperature and Humidity Microprocessor Controller. (See Sections 3.4

& 5.4 CALCOMMS Computer Interface)

1. RS 485 Computer Interface (Optional)

The standard Model 518 does not include the RS 485 Comm

option. RS 485 Communication PC Boards must be ordered

separately. They can either be installed when the Chamber is

ordered or can be retrofitted in the field by the user.