P/N 315-095355-9
Figure 7
Wiring Diagram of Intrinsically Safe Zone
NOTES:
1. Intrinsically Safe Output:
Open Circuit Voltage: 28 VDC
Short Circuit Current: 93mA
2. Maximum loop resistance must not exceed 35 ohms.
3. A maximum of ten DI-3IS Ionization Detectors or up to five
S121 or S122 Flame Detectors can be used in addition to
mechanical (non-energy storing) shorting devices.
4. Maximum safe system voltage is 250 VAC.
5. For mounting and installation of the ISI-1, see the ISI-1
instructions.
6. Only mechanical (non-energy storing) shorting devices
such as the MS-51 Manual Station may be used.
7.
WARNING:
Do not make any connection to terminal 6
of the DB-3S base. Such a connection would void use
in an intrinsically safe application.
8. In addition, S121 and S122 are also approved for use
in Class II and Class III, Groups E, F, and G.
9. For guidance on installation see ANSI/ISA RP 12.6,
“Installation of Instrinsically Safe Instrument Systems in
Class I Hazardous Locations”
.
10. For DI-3IS information, see the DI-3 Series installation
instructions, P/N 315-081943.
11. For S121 and S122 information, see the installation
instructions, P/N 315-085258.
INTRINSICALLY SAFE APPLICATION
FM APPROVED ONLY
7
8
9
10
11
12
6
5
4
3
2
1
7
9
10
11
12
6
4
3
2
1
8
5
ISI-1*
*THE ISI-1 IS A TWO-CHANNEL INTERFACE.
ONE CHANNEL IS SHOWN CONNECTED.
ISI-1*
Mechanical Installation
1.
Mount the CZM-1B6 in a standard two gang
electrical box. The box must have a depth of at
least 3½ inches.
2.
When the field wiring is connected (See above),
press the CZM-1B6 into the box and fasten it with
the four screws provided.
3.
Attach a dress bezel if necessary, making sure
that the
ALARM
LED is aligned with the hole in the
bezel.
Electrical Ratings
t
n
e
r
r
u
C
e
l
u
d
o
M
C
D
V
5
e
v
i
t
c
A
A
m
0
t
n
e
r
r
u
C
e
l
u
d
o
M
C
D
V
4
2
e
v
i
t
c
A
A
m
0
5
t
n
e
r
r
u
C
e
l
u
d
o
M
C
D
V
4
2
y
b
d
n
a
t
S
A
m
5
.
2
1
Zone resistance:
35 ohms total
S
A
E
R
A
1
-
I
S
I
L
E
N
N
A
H
C
E
F
A
S
S
U
O
D
R
A
Z
A
H
+
1
9
5
-
1
8
4
+
2
2
1
2
-
2
1
1
1
0
1
,
7
,
6
,
3
:
N
O
I
T
C
E
N
N
O
C
O
N
