EP20-XXXXX-XXX-XXX (en)
Page 21 of 44
Leak Detector Safe Loop Calculations
Leak Detector
Cable
Zener Barrier
IR Part Number 96270-2
Alpha Wire 1173C
IR Part Number 97414
Ui = 32 VDC
Uo = 25.2 VDC
Ii = 87 mA
Io = 74 mA
Pi = 0.616 W
Po = 0.464 W
Ci = 0.052 uF
Cc 0.055uF
Co = 0.107 uF
Li = 3.7 uH
Lc 6.488mH
Lo = 6.492 mH
Um = 250 VAC/DC
Um = 250 VAC/DC
Ta = -18oC To +80oC
Ta = -40
°
C To +60
°
C
Ui ≥ Uo (32 V > 25.2 V)
Ii ≥ Io (87 mA > 74 mA)
Pi ≥ Po (0.616 W > 0.464 W)
Maximum Cable Capacitance Cc = Co-Ci ≥ 0.107 uF - 0.052 uF = 0.055 uF
Maximum Cable Inductance Lc = Lo-Li ≥ 6.492 mH - 0.0037 mH = 6.488 mH
As per cable manufacturer Alpha Wire, Cable Capacitance = 33PF/FT, Cable Inductance = 0.00018 mH/FT
Maximum cable run length = 359 feet
Calculated Cable Capacitance = 11.8 nF < 0.055 uF
Calculated Cable Inductance = 6.48 mH < 6.462 mH
7.3.2 Thermal Protection - Hazardous Motor
CAUTION
Do not connect the "Logic Out" (Pin 10) from MCB 112 card to VFD digital input pin 33. The
digital inputs on the VFD are configured for NPN and are not compatible with the logic out from the PTC
thermistor card.
The hazardous motor is installed with 3 PTC thermal sensors in series. It is required to wire the PTC sensors to terminals T1
and T2 on the MCB 112 PTC thermistor card installed in the option A slot of the VFD. This card comes pre-installed when
the hazardous VFD option is ordered.
Ensure T37 (Safe Stop) from MCB 112 Thermistor card is wired to pin 37 on VFD as shown below. If an emergency stop is in-
stalled on this unit (recommended), it will need to be wired in series between these terminals as shown. Additionally, when
and emergency stop is in series with the output of the PTC thermistor card, the Safe Torque Off digital input (pin 37) can be
tripped by either the PTC thermal sensor or the E-stop (Alarm 68).
Please note that the option A slot is not available for fieldbus communication card options for hazardous duty pump con-
figurations.
PTC
M 3~
TP
TP
12 13 18 19 27 29 32 33 20 37
MS 220 DA
Code No. 130B1137
Motor protection
SEE MANUAL FOR
MCB 112 PTC Thermistor Option B
ADDITIONAL INSTRUCTIONS.
PTB 14 ATEX 3012U
CAUTION:
II (2) G [Ex e] [Ex d] [Ex n]
ε
10
10 mA
60 mA
12
20-28 VDC
20-28 VDC
II (2) D [Ex tb][Ex tc]
0102
12030-1201-03
.com
X44
1
T1 T2 NC NC NC NC NC NC NC
NC
LOGIC
SAFE STOP
OUT
T37
2
3
4
5
6
7
8
9
10 11 12
NOTE:
Ensure that the jumper wire (from factory) between pins 12 and 37
is removed prior to wiring the thermistor card to pin 37.
Содержание ARO EVO EP20 Series
Страница 43: ...EP20 XXXXX XXX XXX en Page 43 of 44...