Entelli-Switch 250 Microprocessor Controller; Overview - GE ZTS Series Operation And Maintenance

Entelli-Switch 250 Controller
Entelli-Switch 250 Controller
Consists of two major assemblies:
The Microprocessor contains the following:
I.
A. Entelli-Switch 250 Board - Customer Input
and Output (I/O) for system interface. Located
on the left hand side of the back of the unit
(see figure 6)
1. I/O accessories that can be found here are:
a. Engine start relay P output
b. Pre-Signal to transfer T3, W3 and
UMD output (optional)
c. Transfer Inhibit Q3 and Q7 input
(optional)
d. Remote test Q2 input (optional)
e. Network interface ZNET
input/output (optional)
B. LCD and Keypad located on the exterior
of the door (see figure 7)
1. User accessibility to the following:
a. LED indication of source
availability
b. LED indication of transfer
switch position
c. LCD screen indicates:
(1) timer count down (numeric)
(2) event reporting (text)
d. Keypad provides user interface to:
[in conjunction with LCD screen]
(1) Setting sensors and timers
(2) Configuring logic accessories
II. The R/T box (relay transformer box) contains
the following: (see figure 6)
A. Relays which are required for controller output
to energize the transferring mechanism of the
transfer switch at line voltage.
B. Transformers which drop line voltage
to control level for controller input.
6
ZTS / ZTSD Operation and Maintenance Manual (71R-3000)
Engine Start Relay P
I/O Interface
M O N 2 3 A P R 2 0 0 2
M O R E
Entelli-Switch 250
Entelli-Switch 250
Board
Battery Strip
and
Access
Code Label
R/T Box
Figure 6
S 1 O K
2 1 : 5 6
T E S T
Figure 7
GE Zenith Controls