Carrier 040-420 - Manual (Page 71)

- - - - - - - - -
- - - - - - I I -
I
- - - - - - - - - I
I
! I
I
L - B - - - - - I
l
211
I
I
w - - - m - - - -
I
I
r - - - - - - - -
- - - -
S W I T C H
l - - - ‘ I
I
I
I
- -
I
- - - - - - - - - - - - - - - A - - - - - - -
I
- - - - - - - - m - w - - - - - - -
4-20 OUTPUT
I
- - - - - I - - - - - - - - - - - - - - - - Y - -
LEGEND
Contactor Switch
Circuit Breaker Transformer
C O M M Communications Bus UR Unloader Relay
Fig. 25 Accessory Unloader Control Wiring, 130 (50 Hz), 280
FIELD WIRING
Refer to Fig, 26 36 for field wiring.
4 O U T
M O D U L E
! - - - - - - i t - - - -
STAGE 1
L
STAGE2
- - - - - - - - - - -
u
NOTE: Contacts must be rated for dry circuit application, capable of
reliably switching a 5 vdc,
to 20 load
Fig. 26A Demand Limit Two External Switch
Inputs, and Associated Modular Units
T B 7
STAGE 1
L - - - - - - - - - - -
T B 7
r e m - - - H - - - -
I
T B 7
STAGE2
2 T B 7
Terminal Block
N O T E S :
1
Requires accessory options module package.
2 Contacts must be rated for dry circuit application, capable of re-
liably switching a 5 vdc, 1 to 20 load
Fig. 26B Demand Limit Two External Switch
Inputs, 250, 280 Units
71