Carrier 19XL - Manual (Page 79)

Processor Module (PSIO) (Fig. 41)
INPUTS — Each input channel has 3 terminals; only 2 of
the terminals are used. Application of chiller determines which
terminals are normally used. Always refer to individual unit
wiring for terminal numbers.
OUTPUTS — Output is 20 vdc. There are 3 terminals per
output, only 2 of which are used, depending on the appli-
cation. Refer to the unit wiring diagram.
Starter Management Module (SMM) (Fig. 42)
INPUTS — Inputs on strips J2 and J3 are a mix of analog
and discrete (on/off) inputs. Application of the chiller de-
termines which terminals are used. Always refer to the
individual unit wiring diagram for terminal numbers.
OUTPUTS — Outputs are 24 vdc and wired to strip J1. There
are 2 terminals used per output.
Options Modules (8-Input) — The options modules
are optional additions to the PIC, and are used to add tem-
perature reset inputs, spare sensor inputs, and demand limit
inputs. Each option module contains 8 inputs, each input meant
for a specific duty. See the wiring diagram for exact module
wire terminations. Inputs for each of the options modules
available include the following:
OPTIONS MODULE 1
4 to 20 mA Auto. Demand Reset
4 to 20 mA Auto. Chilled Water Reset
Common Chilled Water Supply Temperature
Common Chilled Water Return Temperature
Remote Temperature Reset Sensor
Spare Temperature 1
Spare Temperature 2
Spare Temperature 3
OPTIONS MODULE 2
4 to 20 mA Spare 1
4 to 20 mA Spare 2
Spare Temperature 4
Spare Temperature 5
Spare Temperature 6
Spare Temperature 7
Spare Temperature 8
Spare Temperature 9
NOTE: Address switches on this module can be at any position.
Addresses are only changed through the LID screen or CCN.
Fig. 40 — LID Module (Rear View) and
LED Locations
NOTE: Address switches on this module can be at any position.
Addresses are only changed through the LID screen or CCN.
Fig. 41 — Processor (PSIO) Module
NOTE: SMM address switches should be set as follows:
S1 set at 3; S2 set at 2.
Fig. 42 — Starter Management Module
(SMM)
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