From 9d87c925a9eaa4fc256be3173c14a20d1469472d Mon Sep 17 00:00:00 2001
From: fishsoupisgood <github@madingley.org>
Date: Wed, 9 Sep 2020 11:53:37 +0100
Subject: everything, mostly, working

---
 radiator-plc/DOCS/valve_wiring.txt | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 radiator-plc/DOCS/valve_wiring.txt

(limited to 'radiator-plc/DOCS/valve_wiring.txt')

diff --git a/radiator-plc/DOCS/valve_wiring.txt b/radiator-plc/DOCS/valve_wiring.txt
new file mode 100644
index 0000000..882aa63
--- /dev/null
+++ b/radiator-plc/DOCS/valve_wiring.txt
@@ -0,0 +1,15 @@
+Pin numbers on RJ45 and DB-9 are the same
+
+1 or/w  1 wire bus
+2 or    GND
+3 g/w   uSwitch (short to gound to indicate valve open)
+4 bl    5V
+5 bl/w  24V
+6 g     uSwitch 
+7 br/w  coil - plc pulls to ground to open valve
+8 br    coil
+
+(doubling up is to make wirign in plc neater)
+
+
+
-- 
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