SCHNEIDER AUTOMATION MODICON 140CPS21400 POWER SUPPLY 8AMP 24VDC,
PV: 03, RL: 19
Throughout these notes, all rings are assumed to be commutative
with identity.
§1. Definitions and examples
Definition 1.1. A ring R is called graded (or more precisely,
Z-graded ) if there exists a family of subgroups {Rn}n∈Z of R such
that
(1) R = ⊕nRn (as abelian groups), and
(2) Rn · Rm ⊆ Rn+m for all n, m.
A graded ring R is called nonnegatively graded (or N- graded) if Rn
= 0 for all n ≤ 0. A non-zero element x ∈ Rn is called a
homogeneous element of R of degree n. Remark 1.1. If R = ⊕Rn is a
graded ring, then R0 is a subring of R, 1 ∈ R0 and Rn is an
R0-module for all n. proof. As R0 · R0 ⊆ R0, R0 is closed under
multiplication and thus is a subring of R. To
see that 1 ∈ R0, write 1 =
P
n
xn where each xn ∈ Rn and all but finitely many of the
xn’s are zero. Then for all i,
xi = 1 · xi =
X
n
xixn.
By comparing degrees, we see that xi = xix0 for all i. Therefore,
x0 = 1 · x0 =
X
n
xnx0
=
X
n
xn = 1.
Hence 1 = x0 ∈ R0. The last statement follows from the fact that R0
· Rn ⊆ Rn for all n.
Exercise 1.1. Prove that all units in a graded domain are
homogeneous. Also, prove that if R is a graded field then R is
concentrated in degree 0; i.e., R = R0 and Rn = 0 for all
n 6= 0.
Exercise 1.2. Let R be a graded ring and I an ideal of R0. Prove
that IR ∩ R0 = I. Examples of graded rings abound. In fact, every
ring R is trivially a graded ring by letting R0 = R and Rn = 0 for
all n 6= 0. Other rings with more interesting gradings are given
below.
The CableFast wiring system eliminates wiring between the I/O
module and field wiring terminal blocks. The CableFast
system reduces wiring time, lowers installation cost, and
eliminates wiring errors.
The CableFast system consists of pre-wired Quantum field wiring
terminal strips, available in various cable lengths that
are terminated with "D" type connectors. The "D" connectors plug
into DIN rail mounted terminal blocks offered in straight
through or special application versions. Cables and terminal blocks
are ordered separately and all terminal blocks may
be used with any cable length. Pigtail cable versions are also
available.
i 140 CFA 040 00 The A block is a straight through point to point
connection on the terminal block.
Wiring of this block is identical to wiring the Quantum I/O
connector (140 XTS 002 00).
i 140 CFB 032 00 The B block is used for individually fused 2-wire
digital inputs. This terminal block is designed
to prevent a single point failure from affecting the remaining
inputs. It is not recommended for
sourced 1-wire inputs (powered from the field).
i 140 CFC 032 00 The C block provides connection for 32 group fused
input or output points. The block may be
used for 1- or 2-wire inputs or outputs, and features a fuse per
group, four groups total. Users
select input or output mode via four switches located on the
module. (The default is input mode.)
i 140 CFD 032 00 The D block is used for sensors requiring either
2- or 3-wire electrical interface. A fuse per group
is supplied to accomodate the I/O module (4) groups.
i 140 CFE 032 00 The E block provides connection for 32
individually fused 24 Vdc outputs. 1- and 2-wire
interfacing may be selected. Field power must be supplied to the
four groups.
i 140 CFG 016 00 The G block is a high power output block used on
both AC and DC circuits requiring up to 2 A.
Individual fusing is provided and may be used in both 1- and 2-wire
installations. It is also used
for isolated AC modules.
i 140 CFH 008 00 The H block is used for analog inputs, with
individual fusing provided per channel. This interface
provides plus, minus, shield, and power supply interface for both
field and loop power
configurations.
i 140 CFI 008 00 The I block is used for analog inputs. This
interface provides plus, minus, shield, and power
supply interface for both field and loop power configurations.
i 140 CFJ 004 00 The J block is used for analog outputs, with
individual fusing provided per channel. This interface
provides plus, minus, shield, and power supply interface for both
field and loop power
configurations.
i 140 CFK 004 00 The K block is used for analog outputs. This
interface provides plu
Specifications
Manufacturer Schneider Electric
Series Modicon Quantum
Warranty 2 year
Module format Standard
Power supply type Summable
Input voltage 24 V DC 20...30 V
Input current <= 3800 mA
Inrush current 25 A 24 V
14 A 20 V
Input power interruption 1 ms 20 V
<= 100 ms
Associated fuse rating 5 A slow-blow
Output voltage 5.1 V DC
Power supply output current 8 A summable
Output overvoltage protection Internal
Output overload protection Internal
Power dissipation 6 + (1.8 x Iout) where Iout is in A
Alarm output 1 NC 6 A 220 V power supply fault
Local signalling 1 LED green power (PWR OK)
Marking CE
