Metrix MX2034 Installation Manual

Doc# 100545 • REV C (May 2016) Page 11 of 16
Intrinsically Safe Installaon in Hazardous Environments
The driver requires a minimum of 17 VDC for proper operaon. The voltage drop across the
specied zener barriers on the installaon drawings with a 20 mA loop current is 8.1 VDC. The
minimum loop power supply voltage required is 25.1 VDC plus 1 volt for each 50 Ω of loop
resistance. The maximum loop power supply voltage that may be applied to the safety barrier
is 26 VDC. Therefore, the maximum loop resistance with a 26 VDC supply is 45 Ω.
Example: Single wire resistance = 5 Ω
Resistance of receiver = 50 Ω
Total loop resistance = 55 Ω
Minimum supply voltage = 55 Ω (1VDC/50 Ω) + 25.1 VDC = 26.2 VDC
Permanent wiring connecon to the Dynamic Signal terminal or BNC connectoris not allowed
under the intrinsic safety cercaon requirements. Table 1 lists recommended zener barri-
ers. Other barrier manufacturers can be used as long as they meet the required parameters
noted on the installaon drawings.
DPS Model MTL Barrier Model
MX2034 MTL 787(+) or
equivalent
Table 1: Recommended Barriers
INPUT/OUTPUT PARAMETERS
Power Terminal
Enty Parameters
U
i
28V
I
i
93mA
P
i
0.66W
C
i
18nF
L
i
0
Table 2: Power Terminal Enty Parameters
UL/CSA Parameters
V
oc
= 5.36V
I
oc
= 93mA
C
a
= 62uF
L
a
= 8.5mH
P
o
= 0.5W
Table 4: Probe Connector
UL/CSA Enty Parameters
ATEX Parameters
U
o
5.36V
I
o
3.64mA
P
o
20mW
C
i
24nF
L
i
110μH
C
o
32μF
L
o
500μH
L
o
/R
o
> 1000μ/H/Ω
Table 3: Probe Connector
ATEX Enty Parameters

Metrix MX2034 Specifications

General

Brand	Metrix
Model	MX2034
Category	Measuring Instruments
Language	English