Technical data

Publication 1794-2.1 - January 2000
140 24V dc 2 Channel Very High Speed Counter Module Cat. No. 1794-VHSC FLEX I/O and FLEX Integra Product Data
Wiring
C
onnect
i
ons
f
or
1794-TB3G shown
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
Chassis Gnd Chassis Gnd
Channel 0 Counter/Frequency Input Channel 1 Counter/Frequency Input
6 Chassis Ground
for Shields
Row 1
Row 2
Row 3
24V Inputs 24V Inputs
5V Inputs 5V Inputs
AABBZZZ O0 O1 A A BB ZZO2 O3
AABBZZ R0 R1 A A BBZZR2 R3
COM+24V-V+V-V+V+24V COM
Where: A, A = incremental encoder input A (+5 or +24V dc)
B, B
= incremental encoder input B (+5 or +24V dc)
Z, Z
= incremental encoder input Z (+5 or +24V dc)
O = sourcing outputs
R = returns for sourcing outputs
+V = +5 or +24V dc isolated power externally supplied for outputs (1A max)
-V = negative isolated power connection (1A max)
+24V dc = 24V dc terminal base power for module
COM = return for +24V dc terminal base power for module
Chassis Gnd = chassis ground for input or output cable shields
41704
Power for 00 to 01 Power for 02 to 03
C
B
A
ATTENTION
!
To reduce susceptibility to noise, power analog modules and
digital modules from separate power supplies. Do not exceed a
length of 10m (33ft) for module dc power cabling.
Total current draw through the terminal base unit is limited to
10A. Separate power connections to the terminal base unit may
be necessary.
Incremental
Encoder
Inputs
Channel 0 Channel 1
+24V Inputs +5V Inputs +24V Inputs +5V Inputs
Input A A-0 B-17 A-8 B-25
Input A
A-1 B-18 A-9 B-26
Input B
A-2 B-19 A-10 B-27
Input B
A-3 B-20 A-11 B-28
Input Z A-4 B-21 A-12 B-29
Input Z
A-5 B-22 A-13 B-30
Outputs Sourcing
Out
Return Outputs Sourcing
Out
Return
O0 A-6 B-23 O2 A-14 B-31
O1 A-7 B-24 O3 A-15 B-32
+24V Terminals B-34 and C-50
24V COM Terminals B-35 and C-51
+5V or +24V output power Terminals B-37 and C-46
-V output power Terminals B-39 and C-48
Chassis Ground Terminals B-16, B-33 and C-40 thru C-45